New South Wales Code of Practice for Plumbing and Drainage Third Editions 2006

8/19/2019 New South Wales Code of Practice for Plumbing and Drainage Third Editions 2006

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New South Wales Code of Practice

Plumbing and Drainage

Produced byCommittee on Uniformity of Plumbing

and Drainage Regulations in NSW(CUPDR)

1 July 2006


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NSW Code of Practice for Plumbing and Drainage 3rd

Edition 2006 PREFACE

PREFACE

This Code was prepared by the Committee on Uniformity of Plumbing and

Drainage in New South Wales (CUPDR), to provide uniform administrative

and technical requirements for the installation of plumbing and drainage in

NSW.

This Code replaces the New South Wales Code of Practice: Plumbing and

Drainage, Edition No 2 July 1999.

This Code adopts the National Plumbing and Drainage Code AS/NZS

3500:2003 and amendments and Part 5 2000, with New South Wales

variations and additional provisions as set out in this Code.

ISBN 0 9757516 3 8

1 July 2006

© Copyright – CUPDR

Users of this Code are reminded that copyright subsists in all CUPDR

publications. Except where the Copyright Act allows no publication

produced by CUPDR may be reproduced, stored in a retrieval system in any

form or transmitted by any means without prior permission in writing from

CUPDR. Permission may be conditional on an appropriate royalty payment.

Requests for permission should be directed to the Secretary of the

Committee.

CUPDR

c/- Department of Energy, Utilities and Sustainability

Level 17

227 Elizabeth Street

Sydney NSW 2000

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2.2.3 Storage Tank Fire Sprinkler System 22

2.2.4 Sealing Of Fire Services 22

2.2.5 Fire Service Usage Monitoring 22

2.2.6 Booster Pumps For Fire Services 22

2.2.7 Work Of Irrigation 232.2.8 Water Services – DN 32 Or Greater 24

2.2.9 Cross-Connection Control And Backflow Prevention Devices 24

2.2.10 Meters 25

2.2.11 Privately Owned Meters 26

2.2.12 Joint (Or Split) Property Services 26

2.2.13 Multiple Occupancy 26

2.3 DRINKING WATER 26

2.3.1 Temporary Construction Site Services And Vacant Land 26

2.3.2 Temporary Extended/Joint-Multiple Non-Standard Water Services 272.3.3 Installation of Drinking Water Storage Tanks 27

2.3.4 Maintenance of Water Storage Tanks 28

2.4 NON-DRINKING WATER INSTALLATIONS 28

2.4.1 Permitted Use 28

2.4.2 Installation Procedures in Non-Drinking Water (Recycled Water) Areas 29

2.5 INSTALLATION OF PUMPS 29

3 ON-SITE WATER SERVICES WHERE A RETICULATED WATER SUPPLY

IS INSTALLED 31

3.1 RAINWATER HARVESTING 313.1.1 General 31

3.1.2 Rainwater Use 31

3.1.3 Single Domestic Premises 32

3.1.4 Installations Other Than Single Domestic Premises 32

3.1.5 Cross-Connection Control and Backflow Prevention 32

3.1.6 Maintenance 33

3.1.7 Rainwater Tank Top-Up Facilities 33

3.2 ON-SITE GREYWATER DIVERSION SYSTEMS AND RECLAIMED

WATER TREATMENT SYSTEMS – SINGLE RESIDENTIALDWELLINGS 33

3.2.1 Scope 33

3.2.2 Permitted Re-Use 34

3.2.3 General Requirements 34

3.2.4 Approvals Required 34

3.2.5 Installation Requirements 36

3.2.6 Backflow Prevention 36

3.2.7 Maintenance Requirements 36

3.2.8 Diversion or Treatment System Top-Up Facilities 36


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1.2 STANDARD 51

1.3 NSW VARIATIONS AND ADDITIONAL PROVISIONS TO

AS/NZS 3500 51

NSW VARIATIONS AND ADDITIONAL PROVISIONS TO

AS/NZS 3500

PART 1: WATER SERVICES 53

SECTION 2 MATERIALS AND PRODUCTS 53

SECTION 3 SIZING OF WATER SERVICES 54

SECTION 4 CROSS-CONNECTION CONTROL AND BACKFLOW

PREVENTION 57

SECTION 5 INSTALLATION OF COLD WATER SERVICES 58

SECTION 6 FIRE SERVICES 62

SECTION 7 IRRIGATION AND LAWN WATERING SYSTEMS 64SECTION 8 WATER STORAGE TANKS 65

SECTION 9 NON-DRINKING WATER SERVICES 67

NSW

SECTION 9A ON-SITE GREYWATER SERVICES 70

SECTION 10 WATER FOR SANITARY FLUSHING 75

SECTION 11 PUMPS 76

SECTION 12 WATER REQUIREMENTS FOR HAEMODIALYSIS

MACHINES 77

SECTION 13 INSTALLATION OF WATER METERS 78

SECTION 14 INSTALLATION OF WATER SUPPLY SYSTEMS FROM

RAINWATER TANKS 82SECTION 15 MULTI-UNIT DEVELOPMENTS 92

PART 2: SANITARY PLUMBING AND DRAINAGE 93


SECTION 3 DRAINAGE DESIGN 94

SECTION 4 DRAINAGE SYSTEM 99

SECTION 5 EXCAVATION BEDDING SUPPORT AND BACKFILLING 103

SECTION 6 GENERAL DESIGN REQUIREMENTS FOR SANITARY

PLUMBING SYSTEMS 104

SECTION 9 GENERAL INSTALLATION OF PIPEWORK 105SECTION 10 PUMPED DISCHARGE 106

NSW

SECTION 10A ON-SITE GREYWATER DRAINAGE SYSTEMS 107

SECTION 11 FIXTURES AND APPLIANCES 112

NSW

SECTION 14 LIQUID TRADE WASTE 114

PART 3: STORMWATER DRAINAGE 119

SECTION 1 SCOPE AND GENERAL 119


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PREFACE NSW Code of Practice for Plumbing and Drainage 3rd

Edition 2006

PART 4: HEATED WATER SERVICES 121

SECTION 1 SCOPE AND GENERAL 121


SECTION 3 CROSS-CONNECTION AND BACKFLOW PREVENTION

AND THERMOSTATIC MIXING VALVES 124SECTION 4 INSTALLATION OF COLD AND HEATED WATER PIPING

AND CONTROLS 125

SECTION 5 INSTALLATION OF WATER HEATERS – GENERAL

REQUIREMENTS 126

SECTION 6 INSTALLATION OF SOLAR WATER HEATERS 127

REFERENCED DOCUMENTS 129

APPENDICES

APPENDIX 1 Application for Plumbing and Drainage Permits andCertificate of Compliance Forms 133

APPENDIX II Inspection Testing and Maintenance Report for Backflow

Prevention Devices and Registered Air Gaps 139

APPENDIX III Commissioning/Maintenance Report for Thermostatic

Mixing Valves 143

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PART A

INTRODUCTION


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PART A NSW Code of Practice for Plumbing and Drainage 3rd

Edition 2006

PART A - INTRODUCTION

1 SCOPE AND APPLICATION

1.1 SCOPE

1) This Code is called the New South Wales Code of Practice for Plumbing and Drainage. It

gives the regulatory requirements in New South Wales for work carried out on:

(i) Water services – drinking and non-drinking;

(ii) Rainwater tank supply systems;

(iii) Sanitary plumbing and drainage – including septic tanks;

(iv) Greywater reuse plumbing systems;

(v) Stormwater drainage;

(vi) Heated water services; and(vii) Recycled water systems

when referenced into the Authorities’ Acts and Regulations.

2) These regulatory requirements are for administrators, plumbing Licensees, developers and

property owners/occupiers.

3) Regulatory authorities have other written requirements in Acts and Regulations. These

shall also be read and followed.

NOTE: Sanitary plumbing and drainage in this Code also applies to the work of sanitary plumbing

and drainage connected to a septic tank system. Refer to Clause 21 Local Government (General)

Regulation 2005.

1.2 PAST CODES OF PRACTICE

Past Codes of Practice will no longer be in effect for plumbing and drainage work

commenced after 1 July 2006. All worked commenced after 1 July 2006 shall be carried out

to the requirements of this Code.

Work commenced prior to 1 July 2006 shall be carried out either to the requirements of the

past NSW Code of Practice July 1999 or this Code.

This commencement date may be varied in the Authorities’ Regulations and advice should be

sought as to the commencement date in the area of operation of the respective regulators.

1.3 PREPARATION OF THIS CODE

This Code was written by the Committee on the Uniformity of Plumbing and Drainage

Regulation in New South Wales (CUPDR). The CUPDR has representatives from the

following bodies:

• Department of Energy, Utilities and Sustainability

•

Sydney Water Corporation• Hunter Water Corporation


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Edition 2006 PART A

4) “Licensee” means a person who holds either:

(i) an endorsed licence (i.e. a contractor licence with a “Q” shown on the bottom

right-hand corner) issued by the Office of Fair Trading authorising the holder to

carry out the work covered in this Code; or

(ii) a qualified supervisor certificate issued by the Office of Fair Trading authorising

the holder to carry out the work covered in this Code.

5) “Local Government Authority” means a local council constituted under the Local

Government Act 1993.

6) For definitions of other terms in this Code see the Acts and Regulations of the Authorities

and AS/NZS 3500.0:2003.

1.9 INTERPRETATION

If any terms used in this Code do not match these definitions, the Acts, Regulations andAS/NZS 3500:2003 take precedence.

Where a difficulty arises in the interpretation of this Code, the Authority shall resolve the

issue.

1.10 PERFORMANCE CODES

Australian Standard AS/NZS 3500:2003 provides plumbing and drainage solutions that will

satisfy the performance requirements outlined in the Plumbing Code of Australia. The

Plumbing Code of Australia has been prepared by the National Plumbing Regulators Forum

(NPRF). The NPRF at the time of writing is a cooperative arrangement between allAustralian jurisdictions but has no legal standing.

The NSW Government, through the CUPDR, supports in principle, the introduction of

performance codes. This Code provides additional plumbing solutions in Part C.

If alternative solutions are proposed by a licensee, each Authority is responsible for

determining acceptance in their area of operation. In the case of country New South Wales,

this is at the direction of the Department of Local Government.

1.11 RESPONSIBILITY FOR DESIGN OPERATION AND PERFORMANCE

1) This Code sets out the minimum requirements for the work of plumbing and drainage.The Authority does not accept any responsibility for:

• design;

• operation;

• performance;

• adequacy of flow; or

• failure of any installation.


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PART A NSW Code of Practice for Plumbing and Drainage 3rd

Edition 2006

2) Compliance with this Code does not necessarily ensure satisfactory operation. The

Licensee shall be responsible for carrying out any additional work to ensure satisfactory

operation.

1.12 MAINTENANCE

It is the property owner’s responsibility to maintain the plumbing and drainage works on the

property and to comply with any specific maintenance requirements referred to in this Code.

The Licensee shall provide written advice on the specific and general maintenance

requirements for the property owner/agent.

1.13 CUPDR CIRCULARS

The CUPDR may issue Circulars to deal with arising issues such as new additions and

amendments of AS/NZS 3500 and such Circulars shall become part of this Code and

enforceable as if in the original Code.


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PART B

ADMINISTRATIVE REQUIREMENTS


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PART B NSW Code of Practice for Plumbing and Drainage 3rd Edition 2006

PART B – ADMINISTRATIVE REQUIREMENTS

1 GENERAL

1.1 SCOPE

This section sets out the general administrative requirements to be followed for the work of

plumbing and drainage.

1.2 PERSONS PERMITTED TO CARRY OUT WORK

1) A Licensee.

2) A person under the immediate supervision and control of a Licensee.

3) A person under the general supervision and subject to the control of a Licensee, but onlyif that person has a Trade Persons Certificate issued by the Office of Fair Trading

authorising that person to carry out that work.

NOTE: An Authority may permit the changing of tap washers and fitting of water saving devices by

the property owner or occupier, within its area of operations.

1.3 PERMITS TO CONNECT/CARRY OUT PLUMBING OR DRAINAGE

1) No work except as provided in Clause 1.5 of this Code for an emergency is to be carried

out without a Permit and approval of the relevant Authority.

2) In areas where plumbing work is regulated under the Local Government Act 1993 aCouncil may impose a Permit requirement as a condition of council approval for

plumbing work.

3) Application for a Permit, where required, shall be made in the form of Appendix 1.

4) An application for a Permit shall be made at least two (2) working days prior to the

commencement of the work.

5) The application shall not contain false or misleading information. It shall be completed in

full. It shall detail all proposed work to be carried out.

6) Fees and/or charges required by the Authority shall be paid prior to the issue of a Permit

prior to commencing work.

7) Fees and/or charges required by any other authority affected by the work shall also be

paid prior to the issue of a Permit.

8) The issue of a permit under this Code does not supersede the requirement to obtain

approval, under Section 68 of the Local Government Act 1993, to carry out plumbing and

drainage work where the Local Government Authority is the approving Authority under

the Act.


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1.3.1 Issue of permits

Permits are issued in accordance with the Authorities’ Acts/Regulations. The Authority may

issue a permit after:

(i) it has received an application;

(ii) it is satisfied with the details supplied in the application; and

(iii) the fees and/or charges for the application have been paid.

Permits to do work of plumbing or drainage may be in the form of permit lodgement and

approval by the Authority, written approval to do work, receipt for work to be carried out or

any other form required by the Authority.

The Authority may:

(i) refuse to issue a Permit;

(ii) require additional information before issuing a Permit; and/or

(iii) impose conditions on a Permit; and/or

(iv) revoke a Permit upon such grounds as it may consider proper, with right of appeal by

the affected party.

1.3.2 Work not in accordance with Permit

Where the conditions of the Permit have not been met, the Authority may order that the

installation be either:

(i) disconnected and removed, or

(ii) rectified within the time specified in the order, or

(iii) disconnection, removal or rectification may be done by the Authority and charged

back to the property owner.

1.3.3 Alteration of permitted work

Work shall be carried out according to the provisions of the Permit. Authorisation of theAuthority is needed before alteration of the work is permitted.

1.4 PERFORMANCE OF WORK

1) The Licensee shall carry out the work according to:

(i) the Authority’s Acts and Regulations;

(ii) the terms of the Permit issued;

(iii) the provisions of the licence issued by the Office of Fair Trading;

(iv) the provisions of this Code; and


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(v) any conditions or directions of the Authority.

2) The Licensee shall perform work as follows:

(i) using only authorised materials;

(ii) taking all necessary safety precautions; and

(iii) in a tradesperson-like manner.

3) The Licensee shall also:

(i) check with the property owner or Agent that the proposed appearance of the

intended installation is satisfactory before commencing work;

(ii) check the position of easements and services belonging to any Authority before

starting work;

(iii) prevent damage to any easements and services belonging to any Authority. If any

damage occurs, the Licensee shall immediately notify the responsible Authority;

(iv) produce the Permit issued for the work in question when the Authority requests it;

(v) correct or remove any work that does not comply with the regulations as directed

by the Authority;

(vi) ensure that during any choke clearing operation of a private sewerage service that

foreign materials, substances or other matter other than sewage, is not flushed,

washed or forced into the Authority’s sewerage system;

(vii) submit an “As Completed” Plan as outlined in Clause 1.6 of this Code if required

by the Authority; and

(viii) notify the Authority at completion of work, complete and issue a Certificate of

Compliance where required by Authorities in their areas of operation. This shall

be submitted within two (2) working days of completion of the work. A copy shall

be issued to both the Authority and to the property owner/occupier.

Licensees are required to make reference to the Building Code of Australia (BCA) where

plumbing works impact on the building structure.

1.5 EMERGENCY WORK

1) Emergency work is when a job needs to be done to:

(i) stop water wastage and/or damage; or

(ii) clear blocked pipes; or

(iii) protect public health and safety.

2) Emergency work may be carried out by a Licensee without first obtaining a Permit.


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3) Where required, on completion of emergency work, the Licensee shall within two (2)

working days provide the Authority with information as required for issue of a Permit.

Plumbers should submit Permits for maintenance work carried out and also copies of

Certificates of Compliance.

1.6 “AS COMPLETED” PLANSThe Licensee shall, if required, issue to the Authority or their nominee, an “as completed”

plan of the work carried out. The plan shall be prepared and submitted in the form required

by the Authority. This shall be done at the time of inspection and submitted prior to the issue

of the Certificate of Compliance.

Plans (diagrams) shall include the following:

(i) Sanitary drainage;

(ii) Rainwater tank plumbing;

(iii) Greywater systems plumbing;

(iv) Backflow prevention devices;

(v) Plumbing from any alternative water sources, e.g. bores, desalinated water etc;

(vi) Fire services;

(vii) Trade waste; and

(viii) Recycled water systems.

1.7 INSPECTION BY THE AUTHORITY

1) The Authority decides what inspection of the work is required and what tests it needs to

witness and Licensees shall establish these requirements prior to commencement of work.

The Licensee shall arrange times for these inspections and/or tests. The times arranged

shall be acceptable to the Authority.

2) The Authority requires two (2) working days’ notice before an inspection and/or

witnessing of tests.

3) Where inspection is required, no work shall be covered up, concealed or put into use untilit has been inspected and accepted unless with the prior permission of the Authority.

4) All work of water supply, sanitary plumbing and sanitary drainage shall be inspected,

tested and commissioned by the Licensee in accordance with the relevant testing and

commissioning procedures set out in AS/NZS 3500.

1.8 INSTALLATIONS AND MATERIALS NOT MENTIONED

1) Any methods of installation or materials that are not covered in this Code shall be

authorised by the Authority before they can be used.


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2) In the case of Authorities covered by the Local Government Act 1993 in Part A Clause 1.4

of this Code, the Local Government Authority shall obtain the concurrence of the

Department of Energy, Utilities and Sustainability.

1.9 SERVICES IN PUBLIC RIGHTS-OF-WAY

Before laying any service in a public right-of-way, Local Government Authority permissionshall be obtained.

1.10 LARGE OR COMPLEX INSTALLATIONS

Proposals for large or complex installations shall be submitted in detail for the Authority to

assess. The Authority requires a minimum of twenty (20) working days advance notice to

process the application for a large or complex installation.

Installations of a large or complex nature include:

(i) industrial complexes;

(ii) commercial complexes;

(iii) residential complexes;

(iv) hospitals;

(v) institutions;

(vi) schools;

(vii) buildings with six (6) or more floors (including basement levels); and

(viii) other installations considered by the Authority as large or complex.

1.11 MATERIALS, FITTINGS AND FIXTURES

1) Only materials and products certified under the National Plumbing and Drainage Products

Certification Scheme shall be used.

2) Materials fittings and fixtures shall display the StandardsMark, WaterMark or Type Test

Mark as required by the Manual of Authorisation Procedures for Plumbing and Drainage

Products (SAA-MP52) or AS 5200 as applicable.

3) Certified materials and products shall be used in accordance with the Conditions of

Certification and any limitations set out in this Code.

4) All materials and products used for work of plumbing and drainage shall be selected to

ensure satisfactory service for the life of the installation, with a minimum life of 50 years,

unless otherwise approved by the Authority.

5) The Authority may reject any material, fitting or fixture (including certified materials and

products) which it deems defective, unsuitable for its application or unsuitable for use in

its area of operation.


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1.12 RETENTION OF EXISTING WORK

Systems not presently connected to the Authority’s mains may be connected only if the work

consists of approved materials and the Authority gives permission. The Licensee shall obtain

the requirements of the relevant Authority before connecting any pre-existing system. The

Authority shall require a test to be carried out to verify soundness of the installation.

1.13 DISUSED SERVICES (WATER/DRAINAGE)

Where a service or part of a service becomes disused, it shall be disconnected as required by

the Authority at the property owner’s expense. Where a property water service is no longer

required, it shall be capped off at the main tap with an approved cap or approved fittings.

Disused sewer services are to be sealed off at the sewer junction using approved materials in

accordance with AS/NZS 3500.

1.14 INDEMNITY

An indemnity statement from the property owner/Agent shall be provided when requested by

the Authority for:

(i) installation of a reflux valve;

(ii) connection of underground structures to the sewer;

(iii) installation of work under special permission that would not otherwise be authorised

under the Code;

(iv) connection of basement drainage gravitating to the sewer;

(v) rehabilitation of a sanitary drain, e.g. relining;

(vi) installation of reduced grades in sanitary drains; or

(vii) retention of existing work.

The Licensee shall have the property owner/Agent of the property complete and sign the

indemnity statement. The statement shall be in a form as required by the Authority. No work

shall commence until the Authority has received this statement and accepted it.


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2 WATER SERVICES FROM RETICULATED SUPPLY

2.1 SCOPE

This section sets out the administrative requirements to be followed for the work of water

services. It covers both drinking and non-drinking reticulated water services.

For the Technical requirements for reticulated water services refer to Part C NSW Variations

and Additional Provisions to AS/NZS 3500: Part 1 Water Services of this Code.

2.2 GENERAL

2.2.1 Fire service installation

Where dual reticulated water services are provided the Authority shall advise applicants

whether fire services are to be connected to the drinking or non-drinking water supply. Fire

services shall not be connected to both supplies in an attempt to improve supply security and

fire system rating.

The supply of water from a fire service for any purpose other than fire fighting or testing of

fire fighting equipment shall only be permitted under special conditions imposed by the

Authority.

Valves shall be protected from damage. Where valves are located below ground within the

property boundary, they shall be provided with a surface box and riser. The box lid shall be

permanently marked with a “W”.

An application to install a fire service shall include the following information:

1) A duplicate set of drawings of the proposed work, indicating:

(i) the location of the property;

(ii) the materials to be used;

(iii) size of pipes;

(iv) positions of all hydrants, hose reels, valves and stop taps; and

(v) type of containment devices to be installed.

2) Location and details of any off-takes, water storage tanks, booster assemblies, pumps,

meter and backflow prevention device.

In the case of fire sprinkler systems, drawings shall show the following:

(a) work up to and including the sprinkler valve assembly;

(b) any fire sprinkler water storage tank to be installed; and

(c) any booster assembly to be installed.


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(Where required, these drawings shall be approved by the New South Wales Fire Brigades

prior to submission.)

3) Details of the proposed connection to the Authority’s main, including:

(i) the location of the connection;

(ii) the size of the connection; and

(iii) the proposed draw-off rate.

2.2.2 Fire hose reels

All fire hose reels shall be connected to a metered service, unless otherwise permitted by the

Authority.

2.2.3 Storage tank fire sprinkler system

In the case of a fire sprinkler system supplied from a storage tank, the Licensee shall be

responsible only to the Authority for:

(i) pipe-work from the water main to the jacking pump;

(ii) the storage tank; and

(iii) the air gap and overflow.

2.2.4 Sealing of fire services

The Authority may require sealing of:

(i) hydrants;

(ii) hose reels; and

(iii) control valves

that are installed in an unmetered fire service.

2.2.5 Fire service usage monitoring

The Authority may require an appropriate double check detector assembly to be installed on afire service to enable monitoring of water usage.

The fact that a fire service is metered does not authorise the use of water from the service for

purposes other than those associated with fire fighting.

2.2.6 Booster pumps for fire services

Installation of booster pumps for fire fighting purposes from the mains water supply shall

require the approval of the Authority.

An application to install any booster pump shall include:


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(i) the brand name and/or name of the manufacturer;

(ii) the model number of the pumping unit;

(iii) the type of pump;

(iv) the size of the inlet and outlet connections of the pump;

(v) the normal speed of the pump in revolutions per minute;

(vi) the kilowatt rating of the pump motor;

(vii) the size and type of the pump impeller;

(viii) the distance of water service pipe between:

(a) the water main, meter, and pump, and

(b) the inlet valve and the water storage tank,

(ix) the vertical difference in height between:

(a) the centre line of the pump and street level; and

(b) the centre line of the pump and the top water level within the storage tank;

(x) a copy of the appropriate pump characteristics curve (head/flow); and

(xi) any other information necessary for a proper consideration of the application.

2.2.7 Work of irrigation

Work of irrigation includes the construction, alteration, extension, disconnection, removal,

maintenance, repair, renewal or clearing of any pipes, fittings or equipment of any irrigation

system communicating or intended to communicate directly or indirectly with any water main

of an Authority. Where dual reticulated water services are provided, the Authority shall direct

whether irrigation services are to be connected to the drinking or non-drinking water supply.

Irrigation services shall not be connected to both supplies in an attempt to improve supply

security and pressure availability.

Irrigation systems for class 1 and 2 buildings may be installed without a permit ONLY IF the

irrigation system is the following type:

(i) a system connected to a hose outlet that is fitted with an authorised hose connection

vacuum breaker. This hose connection vacuum breaker shall be located at a

minimum of 450 mm above the height of the irrigation outlets; and

(ii) pipe and outlets laid at a minimum of 150 mm above ground level and not subject to

ponding.

All other irrigation systems shall be installed by a Licensee.


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When required by the Authority, an application to install irrigation systems shall include:

(a) a detailed drawing of the proposed irrigation system;

(b) a detailed drawing of the method of connection to the water service;

(c) an estimate of the anticipated maximum flow rate requirements of the system;

(d) the position of the proposed backflow prevention device;

(e) the type of proposed backflow prevention device;

(f) details of the proposed pipework (material, size, class of pipe);

(g) type and size of solenoid valves when fitted to the system; and

(h) type and size of all stop taps, valves and control equipment.

2.2.8 Water services – DN 32 or greater

An application for water services DN 32 and greater shall include:

1) Duplicate sets of drawings for the water supply arrangements.

2) Drawings in plan and elevation of:

(i) hot and cold water service;

(ii) boosted water system;

(iii) urinal system; and

(iv) flusherette system.

3) The plans shall be drawn to a scale of not less than 1 in 100 and clearly indicate:

(i) the type of materials;

(ii) the nominal size of all water service pipes;

(iii) the position of all water meters, stop valves, stop taps and other valves; and

(iv) any water storage to be provided, including air gap requirements, overflow pipe

arrangements and any booster pumps.

2.2.9 Cross-connection control and backflow prevention devices

1) The Authority may, at any point in time, require any residential or non-residential

premises connected to the water supply to be provided with a backflow prevention

device(s) for containment at the property boundary. The containment backflow

prevention device(s) and individual or zone backflow prevention devices (accepted in lieu

of containment devices) shall be suitable for the degree of cross-connection hazard rating

deemed applicable by the Authority. Where required by the Authority backflow

prevention devices shall be:


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• registered with the Authority where the backflow prevention device is a break tank,

registered air gap, reduced pressure zone device, pressure vacuum breaker or testable

double check valve assembly;

• of an authorised type;

• installed according to the provisions of this Code;

• maintained in a satisfactory operating condition;

• if required by the Authority as part of the registration process, subject to an agreement

between the Authority and the property owner regarding their installation and

maintenance.

2) All backflow prevention devices are the responsibility of the property owner.

3) The maintenance and testing of backflow prevention devices shall be carried out only byauthorised persons, who are accredited to carry out testing procedures. The accredited

person shall ensure that backflow testing gauges/test units are certified every year by a

qualified instrument maker and details are affixed to the test unit.

4) The property owner shall arrange for all devices to be tested and a “Backflow Prevention

Inspection Testing and Maintenance Report” be provided with the prescribed fee to the

Authority at least on an annual basis. The Authority may require more frequent testing.

5) An Authority may register, inspect, test and carry out maintenance on backflow

prevention devices for a fee. An Authority may also impose a late fee on the property

owner where the testing of backflow prevention devices, submission of the required“Backflow Prevention Inspection Testing and Maintenance Report” and/or payment of

the prescribed fee is not completed by the date specified.

6) Where, in the opinion of the Authority, a potential or physical cross-connection is found

in the water service at any property, or if the water service is installed in a manner that

will enable backflow to occur, the property owner shall, upon written advice of the

Authority, ensure that such cross-connection is immediately disconnected or altered to

comply with the Authority’s requirements or otherwise removed. Failure to comply

within the period nominated by the Authority, may at the Authority’s discretion, result in

the immediate restriction or disconnection of the property from the Authority’s water

supply.

7) The installation of a backflow prevention device(s) may significantly reduce the pressure

and flow rate of the water supply within the premises. The potential for this to occur

needs to be taken into consideration by the Licensee when fitting backflow prevention

devices and the property owner/occupier advised in writing accordingly by the Licensee.

It is the property owner’s/occupier’s responsibility to undertake, at their cost, any works

on the premises necessary to provide an adequate water flow rate.

2.2.10 Meters

Water meters shall be installed as and where required by the Authority. Authorities may not

require metering of particular water services but provision for installation of a water meter

may be required by the Authority. Water meters shall be installed:


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(i) by the Authority or by a licensee;

(ii) within 2 working days of the connection being made to the Authority’s water main

(unless the installation is carried out by the Authority);

(iii) above ground unless under an agreed arrangement with the Authority such as in areassubject to freezing; and

(iv) all DN 20 water meters newly installed/replaced shall have an integrated dual check valve

for backflow prevention unless a more stringent backflow prevention device is required

in accordance with this Code.

Sydney Water Corporation and Hunter Water Corporation shall arrange the installation of all

DN 20 – DN 50 light duty meters in their areas of operation. For DN 50 – DN 300 water

meter assemblies, licensed plumbers are required to arrange with Sydney Water Corporation

and Hunter Water Corporation for delivery of water meter assemblies for each site and to be

installed by the licensee within 24 hours of delivery.

2.2.11 Privately owned meters

The Authority may permit the use of privately owned meters. Privately owned meters on any

water service:

(i) shall be of an authorised design and type; and

(ii) the Authority may examine, test and require stamping of any private meter prior to fixing.

2.2.12 Joint (or split) property services

Where permitted by the Authority, a joint property service installed to serve two adjoining

properties shall be laid in an approved material to a defined point outside the property

alignment to the centre of a “Y” or tee junction where the service shall be bifurcated or

“split”. From the “Y” or tee junction, single services shall be extended to each of the

individual properties to a defined point inside its property alignment and a defined distance

from the adjacent property alignment as specified by the Authority. A pressure limiting valve

shall also be installed on each individual property supply, where required by the Authority.

2.2.13 Multiple occupancy

Where required by the Authority, properties proposed for multiple occupancies shall have the

water supply designed and installed so that each occupancy has its own individual isolation

valve, and provision for metering located in a position determined by the Authority.

2.3 DRINKING WATER

2.3.1 Temporary construction site services and vacant land

A “temporary construction service” is when a water service is required for demolition work,

site preparation or building work.

1) Permission from the Authority shall be obtained before a temporary construction service

is installed.

2) An application shall be made on the appropriate form.


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3) Such services shall be metered and if required by the Authority provided with backflow

prevention commensurate to the degree of hazard as assessed by the Authority.

2.3.2 Temporary extended/joint-multiple non-standard water services

1) Where required by the Authority, an application for permission to install a temporary

extended service shall include the following:

(i) a sketch showing the proposed installation;

(ii) the location of the properties;

(iii) the size of the service requested;

(iv) the material to be used for the service; and

(v) written consent of the Local Government Authority and/or property owner.

Where the service is laid in any public place, road or street written consent shall be

obtained from the Local Government Authority.

Where the service is laid through private property, written consent shall be obtained

from the property owner.

2) The installation shall be in accordance with the technical requirements of this Code.

3) The water service pipe between the water main and the property boundaries and up to the

water meter stop tap shall be of a material approved by the Authority.

4) A water meter shall be installed on private property as near as possible to the water main

or as authorised by the Authority.

5) Temporary services shall be maintained by the owners of the properties for which the

temporary service is installed.

2.3.3 Installation of drinking water storage tanks

The storage for drinking purposes shall be kept separate from storage for all other purposes.

This clause covers the installation of drinking water storage tanks excluding rainwater tanks

referred to in Part C, Section 14 of this Code.

1) An application to install a storage tank shall include:

(i) site details showing:

(a) the location of the tank; and

(b) the arrangement of the inlet/outlet pipe and the overflow pipe;

(ii) tank capacity;

(iii) tank dimensions;

(iv) structural details of the tank;


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(v) details of protective coating or lining against corrosion; and

(vi) purpose of use of tank.

2) All tanks and supports must be structurally sound. If the tank is to hold more than 2,500

litres the application shall also include a Certificate of Structural Adequacy. Thecertificate shall approve the design and support of the tank. A professional structural

engineer shall provide the certificate.

Coated galvanised steel/zincalumeTM tanks with a capacity greater than 2,500 litres shall

not be used inside buildings.

3) Tanks shall be constructed and installed entirely above ground level, unless otherwise

permitted by the Authority.

4) For rainwater tanks, refer to Technical Requirements of this Code.

2.3.4 Maintenance of water storage tanks

1) Storage tanks for drinking purposes shall be regularly tested, cleaned and disinfected to

ensure good drinking quality water is provided. Cleaning intervals shall not exceed two

(2) years.

2) The required air gap shall be maintained for all tanks.

3) Inspection of satisfactory air gap requirements shall be carried out in accordance with the

requirements of AS/NZS 3500.1 Section 4 and shall take place at intervals not exceeding

one (1) year. A Licensee shall undertake the inspection. The Licensee shall give a

written statement of compliance on the appropriate form to the Authority.

4) Records of maintenance shall be retained on site by the property owner/occupier for a

period not less than seven (7) years.

2.4 NON-DRINKING WATER INSTALLATIONS

2.4.1 Permitted use

Permitted use is determined by the Authority in accordance with the advice of NSW Health

requirements, including the NSW Guidelines for Urban and Residential Use of Reclaimed

Water 1993 and Recycled Water Guidelines Multi-Unit Dwelling Developments.

Reclaimed/recycled water may be used as an alternative water source for the following:

• Toilet/urinal flushing;

• Clothes washing machines;

• Garden irrigation with uncontrolled access;

• Car washing and similar outdoor use;

•

Filling external ornamental ponds (not including water contact);


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• Cooling towers;

• Fire fighting.

The supply of recycled water shall be to the washing machine cold water supply only and the

recycled water is not to be accessible from the laundry tub.

2.4.2 Installation procedures in non-drinking water (recycled water) areas

In some areas Authorities may provide both drinking water systems and non-drinking water

systems. Services from these two reticulated supplies may be extended and located below

ground within each property. Licensees are required to raise both services above ground for

installation of water meters as required by the Authority.

During construction, internal plumbing pipework may be installed and the drinking water

used to charge both supplies for testing purposes. A connection to the recycled water service

is only made when the final plumbing inspection of all fixtures and fittings is completed prior

to occupation.

Connection to the recycled water supply shall not be made until the property pipework is

examined by the Authority to ensure there are no cross-connections between the drinking

water and recycled water systems.

2.5 INSTALLATION OF PUMPS

Installation of pumps drawing water from the mains water supply or recycled water shall

require the approval of the Authority.

An application to install any pump shall include:

(i) the brand name and/or name of the manufacturer;

(ii) the model number of the pumping unit;

(iii) the type of pump;

(iv) the size of the inlet and outlet connections of the pump;

(v) the normal speed of the pump in revolutions per minute;

(vi) the kilowatt rating of the pump motor;

(vii) the size and type of the pump impeller;

(viii) the distance of water service pipe between:

(a) the water main, meter, and pump, and

(b) the inlet valve and the water storage tank,

(ix) the vertical difference in height between:

(a) the centreline of the pump and street level; and


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(b) the centreline of the pump and the top water level within the storage tank;

(x) a copy of the appropriate pump characteristics curve (head/flow); and

(xi) any other information necessary for a proper consideration of the application.


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3 ON-SITE WATER SERVICES WHERE A RETICULATED WATER

SUPPLY IS INSTALLED

3.1 RAINWATER HARVESTING

This section sets out the administrative requirements for plumbing associated with rainwatertank systems where a reticulated drinking water supply is installed and applies to tanks that

collect roof water.

Rainwater is water collected from a roof of a dwelling or building. Roofs with access,

particularly vehicular, may result in the contamination of the rainwater and shall be treated as

surface water.

3.1.1 General

Surface or roof water shall NOT discharge directly or indirectly into the sewerage system

unless used to replace the Authority’s water supply in accordance with Clause 3.1.2 of thisCode.

Where the rainwater tank is topped up or inter-connected with a mains drinking water supply,

use of the tank supply shall be subject to any water restrictions imposed by the Authority.

3.1.2 Rainwater use

In urban areas, rainwater can provide an alternative source for a number of uses including the

following:



• Garden irrigation;


• Filling ornamental ponds;

• Filling of swimming pools and spas; and

• Fire fighting.

Some consumers in single domestic premises may also wish to use rainwater for all domestic

purposes including drinking, cooking, bathing and in hot water systems. In these cases, it is

particularly important that they are made aware of the advice from NSW Health.

NSW Health Guideline GL2005_033 of January 2005 in part states:

“A properly maintained tank can provide good quality drinking water. NSW Health

strongly advises householders, councils and developers to ensure that an adequate

system of cleaning and maintenance is in place if rainwater is the sole source of

drinking water.


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Those who use rainwater should be aware of potential risks associated with chemical

and microbiological contamination. Collection of rainwater for human consumption

(drinking and cooking) in areas affected by heavy traffic, incinerators, smelters or

heavy industry is not recommended.

The use of rainwater tanks for drinking purposes is not recommended where areticulated potable water supply is available.”

NOTE: Further information on health risks and tank maintenance can be obtained from the following

sources:

www.health.nsw.gov.au/public-health/ehb/water/rainwater.html

http://enhealth.nphp.gov.au/council/pubs/documents/rainwater_tanks.pdf

3.1.3 Single domestic premises

1) Permission shall be obtained from the Local Government Authority to install a rainwater

tank where the tank capacity is greater than 10,000 litres.

2) Tanks up to 10,000 litres that do not comply with the provisions of State Environmental

Planning Policy 4 also require development approval from the Local Government

Authority.

3) Plumbing installation requirements shall be in accordance with the technical provisions of

this Code.

3.1.4 Installations other than single domestic premises

An application shall be made to the Authority for permission to install a rainwater tank for

other than a single domestic installation.

The application shall include:

(i) Duplicate set of plans of the rainwater service.

(ii) The plan shall clearly indicate:

(a) type of material to be used;

(b) backflow prevention devices and their respective locations;

(c) fixtures to be supplied; and

(d) proposed uses.

3.1.5 Cross-connection control and backflow prevention

Where the Authority requires testable backflow prevention devices to be installed:

(i) they shall be registered with the Authority;

(ii) an appropriately accredited tester shall certify annually that they are functioning as

designed; and

(iii) a copy of the certificate shall be forwarded to the Authority.

http://www.health.nsw.gov.au/public-health/ehb/water/rainwater.htmlhttp://enhealth.nphp.gov.au/council/pubs/documents/rainwater_tanks.pdfhttp://enhealth.nphp.gov.au/council/pubs/documents/rainwater_tanks.pdfhttp://www.health.nsw.gov.au/public-health/ehb/water/rainwater.html


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3.1.6 Maintenance

All rainwater tank systems shall be maintained in accordance with the technical provisions of

this Code, AS/NZS 3500 and NSW Health “Rainwater Tanks” brochure available from NSW

Health or their website at www.health.nsw.gov.au.

Maintenance of the rainwater tank system, including the backflow prevention devices, is the

responsibility of the property owner/occupier, not the Authority.

3.1.7 Rainwater tank top-up facilities

Where required by the Authority, rainwater tank top-up facilities shall incorporate an external

visible air gap. A visible air gap is defined as the unobstructed vertical distance through the

free atmosphere between the lowest opening of a water service pipe or fixed outlet supplying

water to a fixture or receptacle and the highest possible water level of such fixture or

receptacle, and which is external to the rainwater tank.

3.2 ON-SITE GREYWATER DIVERSION SYSTEMS AND RECLAIMED WATERTREATMENT SYSTEMS – SINGLE RESIDENTIAL DWELLINGS

3.2.1 Scope

The following installation requirements are for plumbing associated with the re-use of

wastewater including greywater generated on a single residential premises where a reticulated

water supply is also installed. It covers the pipework from the generation of the wastewater

through the sewage management facility such as:

• a greywater diversion device which diverts but does not treat greywater;

• a greywater treatment system which diverts and treats greywater;

• an aerated wastewater treatment system which diverts and treats sewage; or

• any other system which treats sewage such as a septic tank or greywater to a standard

suitable for re-use

to the point of disposal, such as the land application system. This Section 3.2 does not apply

to reticulated wastewater reclamation schemes.

NOTES:

1. In plumbing and drainage, sewage and wastewater are identical and include all the household

wastewater from baths, showers, basins, laundries, kitchens and toilets. Kitchen wastewater is

not recommended for re-use in greywater diversion devices or greywater treatment systems as it

may contain large amounts of grease, fat, food waste and detergent and be alkaline.

2. Greywater only includes household wastewater of baths, showers, basins, laundries and kitchens.

3. Sewage contains greywater and blackwater (e.g. toilet and bidet discharges).


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management is also required. The Local Government Authority shall not allow the

installation of a manufactured greywater treatment system or sewage management facility

available by retail sale unless it has been accredited by NSW Health.

2) Permission shall also be obtained from the Authority to install a sewage management

facility or greywater treatment system where a reticulated water service or sewerageservice is also provided to the property.

3) An application for a Permit to the Authority shall be supported with written confirmation

of the Local Government Authority’s approval of the proposed installation. The

application shall also include details of the proposed changes to the house drainage and

any proposed on-site wastewater distribution pipework.

4) The re-use of untreated greywater for sub-surface irrigation does not require Local

Government Authority operation or installation approval subject to compliance with the

requirements of Clause 75A of the Local Government (General) Regulation 2005, and the

following conditions:

(i) Wastewater is not diverted from kitchen or toilet plumbing;

(ii) An on-site sewage management facility is not in place;

(iii) Greywater is not stored in any way, other than the practice of capturing in a

bucket or container, and transferring that water to the garden or using it to flush a

toilet, or treated other than primary screening or filtration;

(iv) A washing machine standpipe, or licensed diversion device delivers the greywater

to a sub-soil or sub-surface land application system;

(v) The standpipe or diversion device has a manual switching or selection facility so

that greywater can be easily diverted back to the sewer;

(vi) Any diversion device connected to, or modifying the existing plumbing system is

a licensed device, and must be installed by a licensed plumber;

(vii) Any diversion other than by gravity is only via a licensed non-storage surge tank

and pump system installed by a licensed plumber;

(viii) Some form of non-storage surge attenuation is installed as part of the diversion

device or as a sub-soil trench;

(ix) The local water utility must be notified by the installing plumber that a greywater

diversion device is in place; and

(x) The landowner is required to comply with any Guidelines issued by the Director

General of the Department of Energy, Utilities and Sustainability.

Sewage management facility by definition in the Local Government (General) Regulation

2005 includes:

• Septic tank and collection well;


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• Septic closet;

• Pump well;

• Aerated wastewater treatment system;

• Greywater treatment system;

• Waterless composting toilet;

• Wet composting toilet;

• Incinerating toilet;

• Waste treatment devices;

•

Sand filters; and

• Biological toilets

but not greywater diversion devices.

3.2.5 Installation requirements

The installation shall be installed in accordance with AS/NZS 3500.1 Section 9 Non-drinking

Water and the technical section of this Code, or otherwise approved by the Authority.

3.2.6 Backflow prevention

1) Where a greywater diversion device is installed on a single residential property, the

licensee or property owner shall notify the Authority to ensure that a meter with an

integral dual check valve is installed on the water service for the property.

2) All properties with an on-site greywater treatment system or aerated wastewater treatment

system shall have a testable backflow containment device installed at the water meter, at

the property owner’s cost.

3.2.7 Maintenance requirements

All greywater diversion systems and sewage management facilities are required to be

maintained in accordance with the above provisions of this Code and all other statutory

requirements.

Maintenance of greywater diversion systems and sewage management facilities is the

responsibility of the property owner/occupier, not the Authority.

Local Government Authorities have the right to inspect greywater diversion systems and

sewage management facilities. Local Government Authority approval to operate a sewage

management facility is required for which fees may be charged.

3.2.8 Diversion or treatment system top-up facilities

Greywater or reclaimed water treatment system top-up facilities, where used, shall be througha visible air gap external to the tank of not less than 100 mm. The property owner shall


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maintain the top-up facility. Where required by the Authority the visible external to the tank

air gap shall be registered with the Authority, inspected and tested annually by a licensee.

3.3 RECLAIMED WATER TREATMENT SYSTEMS – MULTI OCCUPANCY

RESIDENTIAL

3.3.1 Scope

The following installation requirements are for plumbing associated with premises with multi

occupancy such as duplexes, flats, home units and townhouses and use of reclaimed water,

that is the re-use of water generated on a residential premises pooled, treated and used by that

same residential premises, where a reticulated water supply is also installed. It covers the

pipework from the generation of the wastewater through the sewerage management facility

such as:

• a greywater treatment system;

•

a wastewater treatment system; or

• any other system which treats sewage or greywater to a standard suitable for re-use.

Greywater diversion devices are NOT permitted on multiple occupancy dwellings.

This Section 3.3 does not apply to dual reticulation schemes.

3.3.2 Permitted use

Permitted use of recycled/reclaimed water is determined by the Local Government Authority

in accordance with Guidelines for Private Decentralised Recycled Water Systems

downloadable from www.deus.nsw.gov.au.

Reclaimed/recycled water may be used as an alternative water source for garden irrigation

and, where approved, for the following:



• Garden irrigation with uncontrolled access;


• External ornamental ponds (not including water contact); and

• Cooling towers.

3.3.3 General requirements

Interim guidance has been developed by NSW Health titled “Greywater and Sewage

Recycling in Multi-Unit Dwellings and Commercial Premises - Interim Guidance”

downloadable from http://www.health.nsw.gov.au/policies/gl/2005/gl2005_051.html.


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Maintenance of recycled/reclaimed water systems is the responsibility of the property

owner/occupier, not the Authority.

Local Government Authorities have the right to inspect systems of sewage management. In

all cases an approval to operate, for which fees may be charged, is required.

3.3.8 Diversion or treatment system top-up facilities

Recycled/reclaimed water or greywater treatment system top-up facilities, where used, shall

be through a visible air gap external to the tank of not less than 100 mm. The property owner

shall maintain the top-up facility. Where required by the Authority, the visible external air

gap shall be registered with the Authority, inspected and tested annually by a licensee.


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4 SANITARY PLUMBING AND SANITARY DRAINAGE

4.1 SCOPE

This section sets out the administrative requirements to be followed for the work of sanitary

plumbing and sanitary drainage, including trade waste.


1) Installations of a large or complex nature include:

• industrial complexes;

• commercial complexes;

• residential complexes;

• hospitals;

• institutions;

• schools;

• buildings with six (6) or more floors, including basement levels; or

• other installations considered by the Authority as large or complex.

2) Applications for large or complex installations, if required by the Authority, shall

include:

(i) Duplicate set of coloured plans indicating:

(a) size of sanitary drain;

(b) location of any sanitary drain including any boundary trap or inspection shaft;

(c) overflow gully;

(d) inspection chamber and reflux valve, where required; and

(e) the property owner’s acceptance in writing of full responsibility for any

basement drainage (see Clause 1.14 of this Code).

Drawings shall be in both elevation and plan view.

Drawings shall also show the correct relationship between any sanitary drains and:

• any building;

• boundaries of property; and

• any sewer


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The plans shall be neatly and accurately drawn. Each separate section of the work shall

be clearly marked using the following colour code:

Green - work of sanitary drainage

Red - vent pipes

- vent stacks

Blue - soil pipes

- combined soil and waste pipes

- combined soil and waste stacks

Yellow - waste pipes

- waste stacks

(ii) A block plan of the property, including the layout of the sanitary drain.

This drawing shall be to a scale of not less than 1:500.

(iii) Details of the method of connection to the sewer. This shall include details

of the discharge pipe or rising main from any sewage ejector or pump.

(iv) The reference level of the overflow gully.

(v) The lowest fixture to be drained to the sewer using gravity.

(vi) The proposed layout of the sanitary drains, including:

(a) size and fixture unit loading;

(b) detailed venting arrangements of the installation;

(c) location of all fixtures;

(d) special pits or arrestors,

(e) any polluted areas to be drained; and

(f) any proposed basement drainage.

(vii) Details of the installation of sewage ejectors or sewage pumps from

fixtures located in basements.

(viii) The proposed discharge rate of any ejectors or pumps.

(ix) Details of any subsoil drainage, including any pits or sumps. Also the

method of discharging subsoil water and/or water from a fire sprinkler

system.


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(x) Details of the existing work of sanitary plumbing where additional fixtures

shall be connected to an existing stack.

(xi) Individual fixtures shall be indicated clearly, using the abbreviations set

out in AS/NZS 3500.2 Table 6.1.

(xii) Other fixture abbreviations shall be shown in a legend on the drawing.

4.3 REDUCED GRADE IN SANITARY DRAINS

Grades in drains less than that stated in AS/NZS 3500 may be permitted by the Authority if:

(i) the property owner accepts responsibility in writing; and

(ii) the property owner agrees in writing to install a flushing tank as directed by the

Authority.

4.3.1 Drains laid at less than reduced grade

Before laying sanitary drain at a grade less than “reduced grade”, as detailed in AS/NZS

3500 Table 3.3, permission of the Authority shall be obtained.

The application shall include:

(i) Plans of the proposed pipeline including:

(a) proposed levels and grades;

(b) point of connection to sewer; and

(c) material and size of drain.

(ii) Fixture unit loading.

(iii) Height of overflow gully above soffit of sewer.

(iv) Proposed survey method.

4.3.2 Drains in deep or wide trenches

Before laying a sanitary drain in a deep trench (i.e. depth greater than 3 metres) or a wide

trench (i.e. width at top of pipe greater than outside diameter of pipe plus 600 mm), the

following is required:

1) Permission of the Authority.

2) A certificate of structural adequacy for:

• class of pipe; and

• bedding, side support, overlay and backfill issued by a suitably qualified civil

engineer registered on the Institution of Engineers, Australia National Professional

Engineers Register (NPER-3) or equivalent.


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4.4 TIDAL OR WATER CHARGED CONNECTIONS

The removal of the cap or plug at the point of connection to the Authority’s sewer in tidal or

water charged ground shall be done in the presence of the Authority’s inspector, unless

otherwise permitted by the Authority.

4.5 CONNECTION OF UNDERGROUND STRUCTURES

An application to connect an underground structure (such as a telephone system inspection

chamber) to the sewer where no other drainage method is available, shall include a duplicate

set of drawings showing the following details:

• location of the underground structure to be drained;

• proposed point of connection to the sewer;

• location of reflux valve installation; and

• a letter of indemnity as required in Clause 1.14 of this Code.

4.6 LOCATION OF THE POINT OF CONNECTION TO THE SEWER

1) The Licensee is responsible for locating the point of connection to the sewer.

2) A plan showing approximate depth and point of connection to the sewer is obtainable

from the Authority. Where the connection is not located, the Licensee shall excavate at

least one (1) metre either side and/or one (1) metre below the indicated position.

3) If the point of connection cannot be located, the Licensee shall contact the Authority

immediately for further directions.

4) In Hunter Water Corporation’s area of operations the connection to pumping/rising mains

or mains DN 300 and greater is prohibited. Properties connected to sewer mains in a

known surcharge area shall incorporate a minimum of 100 mm educt vent. Hunter Water

Corporation may also require a reflux valve in the same situations. When a property is

connected to a sewer main directly affected by a pumping or rising main, a boundary trap

and a minimum of 100 mm educt vent shall be installed .

4.7 DISCHARGE TO SEWER

Surface or roof water shall NOT discharge directly or indirectly into the sewerage system

unless approved by the Authority.

4.8 GENERAL REQUIREMENTS FOR SEWAGE PUMPING

1) Where it is practicable to use gravity, pumping to the sewer is not normally permitted.

2) An application to pump to the sewer shall include:

(i) plans in duplicate showing:

• the description of pumping;

• the capacity and construction of:


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(a) collection wells;

(b) pump suction wells; or

(c) sewage ejectors.

(ii) details of all pumps:

(a) type;

(b) number of pumps;

(c) pumping rate;

(d) expected frequency of operation; and

(e) pump curve details.

(iii) the point of connection to the rising main, or to the Authority’s sewer, and

elevation above pump;

(iv) the venting arrangements for pump wells;

(v) size, length and materials to be used in rising main or discharge pipe; and

(vi) rising mains shall be laid in the Authority’s footpath allocation, or as directed by

the Local Government Authority.

3) Sewage management facilities for less than or equal to 10 EP, or less than or equal to2,000 litres per day flow (pump out septic tanks, collection wells or sewage ejectors)

when installed on single domestic premises shall be accredited by NSW Health and

comply with the Local Government Act 1993 and the Local Government (General)

Regulation 2005.

4.9 JOINTS BETWEEN SANITARY DRAINAGE AND SANITARY PLUMBING

When sanitary drains are to be connected with:

• sanitary plumbing;

• soil pipes;

• waste pipes;

• vent pipes; or

• sanitary plumbing stacks

the connection shall be made by joints that are:

(i) located immediately above ground or at finished floor surface level, wherever

practicable;


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(ii) the Licensee carrying out the plumbing work shall be responsible for making and

sealing the joints according to (i) above.

4.10 MULTIPLE OCCUPANCY

Where required by the Authority, properties proposed for multiple occupancy shall have the

sanitary drainage lines designed and installed so as each occupancy has its own individualsanitary drainage line, each with an inspection shaft and overflow gully.

4.11 LIQUID TRADE WASTE

1) All work of sanitary plumbing and sanitary drainage associated with trade waste shall be

carried out in accordance with the provisions of this Code.

2) All trade waste fixtures and products shall be authorised by the authorisation body for the

area of installation. In the case of Local Government areas, other than those where

Sydney Water Corporation or Hunter Water Corporation is the Authority, installations of

trade waste fixtures and products shall be to the Department of Energy, Utilities andSustainability’s (DEUS) requirements.

3) No discharge of other than domestic liquid waste is permitted to discharge into the

sewerage system without prior written approval of the Authority.

4) Biological or other residuals from sewage management facilities, greywater diversion

devices or water treatment systems (e.g. desalination plants) shall not be returned to the

sewerage system without prior approval of the Authority. The Authority may set limits as

to the rate of flow entering the sewerage system.

4.11.1 Food waste disposal units

1) Food waste disposal units are only permitted for domestic use with the Authority’s

approval. Sydney Water Corporation and Hunter Water Corporation allow installations

of domestic units but require notification of new installations provided on the Permit –

Certificate of Compliance for the property.

2) To install a food waste disposal unit for commercial use where Sydney Water

Corporation or Hunter Water Corporation is the Authority, the following is required in all

cases:

(i) permission of the Authority;

(ii) the waste disposal unit shall only receive normal food for kitchen garbage; and

(iii) the discharge from the waste disposal unit shall be connected to an authorised

grease arrestor.

3) The installation of a food waste disposal unit for non-residential use in Local Government

areas, other than those where Sydney Water Corporation or Hunter Water Corporation is

the Authority, shall not be permitted by the Department of Energy, Utilities and

Sustainability. Existing installations of food waste disposal units in hospitals and nursing

homes may be permitted provided the wastewater generated from these units is

discharged through an adequately sized grease arrestor. Should a hospital or nursing


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home kitchen equipped with food waste disposal units undergo refurbishment then these

units shall be removed at that time.

4.11.2 Arrestors and special pits

An application to install an arrestor or special pit shall include:

• design;

• size;

• construction;

• a trade waste application for permission to discharge to the Authority’s main;

• a product authorisation number; and

• any other information required by the Authority.


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5 STORMWATER DRAINAGE

5.1 SCOPE

This section applies to stormwater drainage which includes:

• roof water;

• surface water;

• subsoil drainage water;

• fire sprinkler water; or

• water from the washing of parked vehicles draining to:

- stormwater drains;

- combined sewers; or

- stormwater channels.

In Local Government areas to which the Hunter Water Act 1991 and the Sydney Water Act

1994 do not apply, the person responsible for any stormwater drainage work is required to

obtain the prior approval of the Local Government Authority under Section 68 of the Local

Government Act 1993.

5.2 GENERAL REQUIREMENTS

1) Permission shall be obtained for any stormwater drainage discharge. In no case shall anysewage or trade waste be connected to stormwater drainage.

2) Applications shall include:

(i) plans and details of the proposed stormwater system;

(ii) details of the proposed discharge rates; and

(iii) a statement of whether the discharge is to go into a:

•

stormwater drain;

• combined sewer; or

• stormwater channel.

3) Connection to mains or channels shall be made in a manner authorised by the Authority.

4) The Authority may require the following to be pumped to the stormwater drainage and

application to the Authority shall be made in each instance:

• stormwater;

• subsoil drainage water; or


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• seepage from any property.

5.3 PLANS AND DETAILS

1) An application for installation of a stormwater service shall include duplicate copies of:

(i) site plan drawn to a scale of not less than 1:500 showing:

(a) the layout of the service;

(b) areas to be drained;

(c) any polluted areas;

(d) proposed point of connection to Authority’s service;

(e) relationship between area to be drained and Authority’s service;

(f) site boundaries and buildings;

(g) nominal size, grade, invert and relative levels of stormwater service; and

(h) materials to be used.

2) Details and location of:

(i) inspection chambers, boundary traps, reflux valves, pits, sumps, arrestors

including venting arrangements, subsoil drainage; and

(ii) stormwater detention.

3) Plans and details shall be neatly and accurately drawn and coloured to indicate the

different parts of the service, e.g. stormwater, subsoil, rising main etc. The colours used

shall be different to those used for sewerage plans.


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6 HEATED WATER SYSTEMS

6.1 SCOPE

All work of heated water systems shall be carried out in accordance with AS/NZS 3500 and

this Code.


For hot water services which have a cold water supply to the heating system of DN 32 or

greater, an application shall be made in accordance with Clause 2.2.8 of this Code.

6.3 INSTALLATIONS NOT DETAILED IN THIS CODE

For installations not detailed in this Code, an application shall be submitted to the Authority

which includes:

(i) type and capacity of hot water system;

(ii) method of heating;

(iii) materials used; and

(iv) method of connection to water supply, including backflow prevention devices where

required.


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7 MOVEABLE DWELLINGS

7.1 SCOPE

1) This section sets out the administrative requirements to be followed for work of plumbing

and drainage in moveable dwellings as defined in the Local Government Act, 1993.

2) Moveable dwellings shall not be connected to the Authority’s services, or caravan

park/camping ground services unless the plumbing and drainage complies with the

requirements of this Code.

7.2 RELOCATABLE HOMES

1) Relocatable homes and manufactured homes, as defined in the Local Government

(Manufactured Home Estates, Caravan Parks, Camping Grounds and Moveable

Dwellings) Regulation 2005, shall be fitted with a NSW & ACT Water/Sewage

Authority’s Compliance Plate (obtainable only from Authorities) stating:

(i) certificate of compliance number;

(ii) test by Licensee No.;

(iii) date of test; and

(iv) the unique identification number of the home.

This information shall match the Certificate of Compliance. The Compliance Plate shall

be permanently fitted by a licensed plumber on the home, next to either the compliance

plate required by the relevant Local Government Regulation or next to a plumbing

connection. It shall be clearly visible.

2) Relocatable homes or manufactured homes constructed prior to commencement of this

Code may be connected where:

(i) a Plumbing and Drainage Certificate of Compliance is provided, or

(ii) permission is given by the Authority, even though the home/dwelling does not

comply with this Code.

7.3 SHORT-TERM RESIDENCE

Moveable dwellings, including relocatable homes and caravans, installed in a caravan park forshort term residence, are not required to be connected to the water or sanitary drainage service

of the park, unless they have installed a:

(i) water closet;

(ii) shower; or

(iii) laundry.

NOTE: Short term residences are sites ordinarily used for holiday purposes.


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PART C

TECHNICAL REQUIREMENTS


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PART C NSW Code of Practice Plumbing and Drainage 3rd Edition 2005

PART C – TECHNICAL REQUIREMENTS

1.1 SCOPE

This part gives the technical requirements to achieve an acceptable solution for the work of plumbing and drainage.

1.2 STANDARD

The work of plumbing and drainage shall comply with the following Australian Standard

AS/NZS 3500 and amendments, with New South Wales variations and additional provisions.

The Australian Standard consists of:

New South Wales Code of Practice for Plumbing and Drainage Third Editions 2006

Documents

Transcript of New South Wales Code of Practice for Plumbing and Drainage Third Editions 2006