6. WATER SUPPLY - Taurangaecontent.tauranga.govt.nz/data/documents/regulatory_docs/idc/2002/... ·...

SECTION 6 Code of Practice for Development TAURANGA DISTRICT COUNCIL Water Supply

Water Supply.doc Print Date: May, 2002 VERSION 1 R1 Page 6 - 1

6. WATER SUPPLY

MINIMUM REQUIREMENTS

6.A General

6.A.1 Standard of Duty For urban developments (unless otherwise agreed by the Group Manager : City Services), an urban water supply system shall be installed, adequate for firefighting purpose and for estimated domestic, commercial and industrial consumption.

C1 The definition of urban includes residential, rural residential, industrial and commercial. With respect to water supply refer to the TDC Water Supply Bylaw Part 8

Unless otherwise approved, all urban residential allotments shall be provided with a water supply connection which shall be 20mm internal diameter minimum.

The T.D.C. Water Supply Area as constituted under the L.Govt. Act 1974, Section 377 is currently subject to public consultation.

Isolated properties in a rural setting may be adequately served by individual rainwater tanks, or where an adequate and confined aquifer exists, by individual privately owned bores or wells, provided that adequate fire protection can be arranged through the New Zealand Fire Service.

6.A.2 Level of Service The water supply reticulation shall be to Water Supply Classification E, or such higher classification as appropriate in terms of the NZ Fire Services Code of Practice 1992.

The design of the reticulation shall conform to the NZ Fire Service Code of Practice 1992, and shall be such that a water supply connection can be readily provided for each allotment.

The minimum firefighting residual running water pressure should be preferably 100 kPa (1 atmosphere, 10m head of water) at any hydrant.

The minimum working residual water pressure, in other than firefighting conditions, should be preferably 300 kPa (3 atmospheres, 30m head of water) at the ground level at the normal house site in each lot.



6.A.3 Where water mains have been or are to be installed by Council, contributions on an area basis shall be made in terms of the development impact fees or other agreed cost sharing arrangement.

MEANS OF COMPLIANCE

6.B Water Demand and Pressure

6.B.1 Domestic Supply In developments of an average size, the domestic demand is not critical and the supply of water for firefighting purposes will generally determine the pipe sizes required. For more extensive areas however the pipe network shall be designed to provide for annual, seasonal and peak demand utilising the available pressures in the existing mains. The design shall provide for an average domestic demand of 430 litre/head/day with a peak flow of 4.3 times this amount.

6.B.2 Commercial and Industrial Supply The water demand for commercial and industrial areas or for irrigation shall be analysed and specifically allowed for in the design, if relevant, but shall not be less than shown in the table below.

Type of Development Fire Flow Domestic Consumption (peak hourly flow)

Residential (based on 50persons/ha) Class E 25 l/s 1.07 1/s/ha

Schools, small hospitals, rest homes, small shopping areas Class D 50 l/s 0.60 l/s/ha

Suburban industrial areas high rise in residential H, large schools and hospitals Class C 100 l/s 1.00 l/s/ha

Large commercial and industrial development Class B 200 l/s 2.00 l/s/ha



6.B.3 Firefighting Supply The water reticulation shall be designed to comply with the requirements of the NZ Fire Service Code of Practice 1992 and amendments and in particular shall meet the code requirements with regard to firefighting flows, running pressure and the spacing of hydrants, together with any additional requirements set out herein, including storage where applicable.

Unless stated otherwise in the Council’s standard requirements, the fire risk classification shall be as shown in the table above.

6.B.4 Design Basis The Council shall provide details of the working pressure or pressures at the point or points of connection to the existing reticulation in which case these will be used for design purposes. The Council shall have the right to specify the diameters to be used for the principal watermains within the development.

Working pressure classes are as follows:

Class of Pipe Maximum working pressure Metre/head kPa C 90 900 D 120 1200 E 150 1500

6.C Reticulation Layout 6.C.1 A watermain of not less than 100mm diameter fitted with fire hydrants (hereinafter referred to as the principal main) shall be laid on one side of all through streets and one side of every cul-de-sac to within 65m of the end of the cul-de-sac subject to the requirements of Clause 6.I.2 regarding hydrant spacing.

6.C.2 A rider main shall be laid along the road frontage of all lots not fronted by a principal main.

6.C.3 Rider mains shall be supplied from a principal main at both ends, except for private ways or at the discretion of the Group Manager City Services.



6.C.4 In the case of arterial and dual carriageway streets, the Group Manager City Services may require principal mains to be laid both sides of the street.

6.C.5 In industrial and commercial areas the pipe sizes shall be adequate for the likely demand. The minimum requirement may be for a 150mm or possibly a 200mm diameter principal main on one side of the street, with another principal main on the other side.

6.D Alignment of Water Mains

6.D.1 Position in Street (a) The position of watermains in the street will nominally be 1.8m from the property boundary. There will be a minimum separation of 500mm, measured horizontally, between the watermain and any other service laid parallel to it. (Drawing W1) Any variation shall be subject to approval of the Group Manager City Services. (b) In areas of steep terrain, such that the area of the street between the back of the footpath and the boundary is normally too steep for topsoiling and grassing or for any form of vehicular access, the watermain would be appropriately laid under the footpath (assuming that in such cases the footpath is next to the kerb) or under the carriageway. (c) If the watermain is under the carriageway, it shall be on an alignment at a prescribed distance from the kerb face. In any case, the Group Manager City Services shall approve a logical combined layout for all underground services in the street. (d) Trees, manholes and similar structures shall not be positioned in berms where they will interfere with the standard alignment of the water main, unless approval is given by the Group Manager City Services.

C2 Refer to Drawing R2 ‘Standard Service Locations’

6.D.2 Setting Out The watermains are to be laid with reference to permanent land transfer pegs or temporary boundary marks placed by the registered surveyor responsible for the final land transfer pegging.



Laying by reference to the kerbline should only be carried out where the surveyor has confirmed that it is the correct designed distance from the land transfer peg positions. The depth of principal mains may vary within the tolerances stated in Clause 6 K, and the pipes laid to grade so that any high and low point occurs adjacent to a fire hydrant.

Laying tolerances shall be up to 100mm of the design alignment. Any problems due to boundary alignment shall be resolved by the consent holder to the satisfaction of the Group Manager City Services and other underground service authorities.

6.E Intersections

At street intersections 90o tees or 90o bends are preferred rather than two 45o bends with a short length of pipe between them. With the kerb to boundary widths and watermain alignments given in (Drawing W1), 90o tees or bends or both can normally be located between the kerb and boundary.

Where the principal watermain is to be laid around the corner, then 45o or similar bends should be used. Drawing W2 sets out the general principles, including the positioning of the valves.

6.F Water Mains with Fire Hydrants (Principal Mains)

6.F.1 General Principal mains shall not be less than 100mm diameter.


Water Supply.doc Print Date: May, 2002 VERSION 1 R1 - 6

6.F.2 Pipe Standards The following pipes may be used for principal mains, providing they comply with the relevant New Zealand or other standard:

• Steel (arc butt welded) NZS 4442 • PVC NZS 7648 • Cast iron NZS 628 • Ductile iron AS 2280:1986

6.F.3 Acceptability of Pipe Materials

PVC pipes are acceptable in all normal circumstances including crossings under carriageways, except as specifically required by Group Manager City Services. The installation should be to NZS 7643 and with particular attention to the anchoring of valves and hydrants against displacement in operation.

Concrete lined steel pipes may be required in potentially unstable ground, for lengths of exposed pipe, or in other special cases and should be the subject of specific design.

Cast iron pipes may be appropriate for lengths of exposed pipe or in other special cases and use shall require specific approval by the Group Manager City Services.

6.F.4 Pipe Pressure Classes Pipes for watermains shall normally be a minimum PN9 or equivalent although a higher class shall be used if necessary to provide for the maximum working pressure in the area in which they are to be laid.

C3 Class “C” now superseded by PN9.It should be noted that mPVC and PE pipe will not meet the test requirements of Clause 6.P.(a). The mPVC pipe may meet the requirements if joints are suitably strengthened, otherwise pipe in these materials shall be a minimum PN12 (Class D)

6.F.5 Joints Joints for PVC pipes shall normally be spigot and socket rubber ring type (Z joints). For other types of pipe joints shall be as recommended by the pipe manufacturer. Gibault joints for use on pressure mains are to have a centre ring. The length of this ring is to be not less than half the pipe diameter.



6.G Rider Mains

6.G.1 Pipe Sizes Rider mains shall have a minimum internal diameter of 50 mm. The table below sets out the desirable maximum number of domestic connections which may be permitted to be served by a rider main. This will depend on the level of service required by the Council.

Dia of Rider Main

Maximum Desirable Number of Dwelling Units (Service Connections)

High Pressure Areas (1) Medium Pressure Areas (2) Low Pressure Areas (3) mm One-end

supply Two-end supply

One-end supply

Two-end supply

One-end supply

Two-end supply

50 20 40 15 30 7 15 NOTE: 1. High pressure means normal working pressure in the principal mains

(other than when firefighting) usually not below 600 kPa. 2. Medium pressure means normal principal main working pressure usually 600 kPa to 400 kPa.

3. Low pressure means normal principal main working pressure which may be below 400 kPa.

6.G.2 Pipe Materials Pipes for rider main construction shall be Class D PVC to NZS 7648 or polyethylene PN12 to AS/NZS 4130:1997. Other pipes, such as polyethylene, may be permitted or required by the Group Manager City Services .

Joints for 50mm diameter PVC pipes shall be spigot and socket rubber ring type (Z joints) except solvent joints assembled in “factory” conditions may be permitted where necessary at tees and valves.

6.H Connection of Rider Main to Principal Main

6.H.1 Where a rider main is to be extended at right angles to a principal main, this shall normally be connected with a cast iron tee with a female threaded branch (or an elongated gibault joint, tapped) and with a brass valve socket, as shown in Drawing W3.



6.H.2 Where a rider main is to be extended along the same alignment beyond the end of the principal main, it shall normally be connected with a similar cast iron tee (or elongated gibault joint) with an anchored blank end plate, and with a vertical socket and right angle brass bend, as shown on drawing W3.

6.H.3 In very soft ground, an additional length of PVC pipe of the principal main diameter, filled with concrete, may be laid beyond the last cast iron tee. This pipe should be well anchored by compaction along its length and terminated with a blank end gibault and an adequate concrete anchor block.

6.H.4 Taper reducers shall be used only in firm ground where the taper can be adequately anchored to the sides of the trench and with the specific approval or requirement of the Group Manager City Services .

6.H.5 The method of jointing shall be to the approval of the Group Manager City Services .

6.I Hydrants

6.I.1 Hydrant Type Hydrants shall be screw-down type, clockwise closing. Types currently approved are Gillies Blakeborough medium and tall pattern, Crevett NZ Hydrant and Humes Torq-Lock. Squat hydrants shall not be used unless specifically approved by the Group Manager City Services may approve the short pattern. The use of ball hydrants is not permitted.

Drain holes for frost protection are not required. If the hydrant is drilled for this purpose, the hole shall be plugged.

6.I.2 Hydrant Spacing Hydrants shall be spaced at intervals not exceeding the following:

• Residential areas 135m • Commercial and industrial areas 90m



(a) Notwithstanding the above spacings, hydrants are to be located to the satisfaction of the New Zealand Fire Service. The New Zealand Fire Service has agreed that fire hydrants shall be spaced along the street at distances not exceeding 135 m. In addition, every building area serviced by hydrants within the street under construction, shall be within 135m of a fire hydrant. For the purposes of this requirement, a building area means any part of a front, corner or through site and that part of a rear site which does not include the access strip. The distance shall be measured along a route which a fire hose would normally be laid. Attention shall be given to the location of hydrants at intersections and in cases of dispute the Group Manager City Services shall refer the matter to the Area Commander who shall make the final decision.

C4 6.I.2 (a)-(e) is particularly for residential areas.

(b) In cul-de-sac or other terminal streets the last hydrant shall be not more than 65m from the end of the street. (c) Where houses or residential units are situated on private ways, there shall be a hydrant within 135m of any house or unit.

(d) Where a residential private way is more than 65m long a hydrant shall be sited at the street end of the privateway or on the other side of the street immediately opposite the entrance in order to ensure each house or unit is within 135m of a hydrant.

(e) If necessary a 100mm diameter principal main shall be constructed and a hydrant placed within the private way in order to ensure each house or unit is within 135m of a hydrant.

(f) Hydrants must be readily accessible for fire appliances and should generally be positioned near street intersections and not less than 6m from any building.

(g) Except for commercial areas, hydrants are not to be offset into the roadway.

C5 When designing subdivisions consideration should be given to placement of hydrants to suit future building sites.

(h) Hydrants should be located wherever practicable within the berms. To avoid conflict with driveways, hydrants shall be located directly opposite the boundary.



6.I.3 Hydrant Installation Hydrant tees shall be flanged if laid next to other cast iron fittings. Otherwise flexible joints are permitted (gibault or spigot and socket rubber ring joints).

Hydrant risers shall be used, or the watermain laid deeper, where necessary, in order to ensure that the top of the spindle is between 100mm and 250mm below finished surface level.

6.I.4 Hydrant Boxes The manufacture and installation of hydrant boxes shall be as shown on Drawings W4, W5, or to such variant as may be permitted or required by the Group Manager City Services .

Surface boxes set in bitumen or concrete surfaces (carriageway or actual footpaths) and shall be surrounded by such edging and with the immediately adjacent concrete set within a square boxed-out construction joint if required.

6.I.5 Location Marking of Fire Hydrants The location and marking of fire hydrants shall be to NZS 4501, subject to the following clarification:

• The lid and concrete surround is to be painted yellow (road marking paint).

• A triangle is required with its base next to the road centerline and a blue reflective marker affixed to the pavement on the center line.

C6 If in cobblestone streets a triangle is not desired a marker post a blue cats eye and the face of kerb painted are required wherever a hydrant is constructed.

• In kerbed residential streets the kerb is to be painted on both the face and top for a length of 300mm and a marker post is not required.

• In un-kerbed streets and rural areas a marker post will be installed adjacent to the boundary.

• Where a hydrant is in the carriageway, a circle is also required."

Concrete indicator posts, if required, shall be of an approved type, set vertically in the ground within 230mm of the lot boundary and immediately opposite the hydrant which it indicates. Each post shall be firmly set to a depth below ground level of at least one third of its overall height and shall bear the inscribed letter “H”. Hydrant indicator posts shall be painted yellow (see Drawing W8).



6.J Valves

6.J.1 Sluice Valves The valves on the principle main shall be resilient faced, anticlockwise closing to Class 1 BS 5163, or to AS 2638: 1991 (pressure rated 1600kPa).

Valves shall be flanged when laid next to another cast iron fitting or when required by the Group Manager City Services . In line valves may be spigotted or socketed to take flexible joints (gibault or Z joint). All sluice valves 100mm diameter and larger shall be strapped to a concrete anchor block .

6.J.2 Gate Valves (also known as peet valves) The valves on rider mains shall be gate valves. Gate valves shall be to BS 5154 or AS 1628.

6.J.3 Air Release Valves and Scour Valves Water mains shall be laid to grade such that the hydrants are at high or low points to act as air valves or scour valves.

All dead end principal or rider mains shall be fitted with permanent scour valves complete with valve box and marker posts.

6.J.4 Positioning of Valves Valves shall generally be placed on two of the three legs leading from each tee intersection. Where required by the Group Manager City Services, valves shall be placed on all three legs if this is necessary in order to limit the number of houses without water in the event of a shutdown. Wherever practicable, valves shall be located in berms. On new watermains, valves shall be located at junctions with existing mains and at intervals not exceeding 500m along the main. Rider mains shall have valves at both ends of the rider main. Valves shall be located as close to junctions as possible.



Valves shall be specifically located with a view to minimum disruption of supply to consumers and sufficient valves shall be provided to satisfy this requirement.

6.J.5 Valve Boxes Valve boxes shall be Drawing W7, or to such other established local practice as may be permitted or required by the Group Manager City Services .

Each valve shall be covered by a min 150mm diameter riser pipe with the cast iron valve box set flush with the surface. Valves shall have the same internal diameter as the main on which they are installed.

Where oblong boxes are used, they should be aligned with the watermain.

6.J.6 Valve Indicator Posts The position of all valves on firemains and rider mains shall be indicated by means of reinforced concrete indicator posts as described in Section 5.I.5 except that the posts shall bear the inscribed letter “V”. Valve indicator posts shall be painted white (Drawing W8).

6.J.7 Butterfly Valves Butterfly valves shall not be used.

6.K Depth of Water Mains

Both principal mains and rider mains shall have the following minimum cover, except in circumstances requiring special protection. Greater depth shall only be provided if required and / or approved by the Group Manager City Services .

(a) Under grass berms and footpaths; Top of pipe 600mm below finished surface (maximum 1 metre). (b) Under carriageway; Top of pipe 900mm below finished surface level over the pipe (maximum 1.2 metres).



Service connection pipes shall have 350mm cover (± 50mm). The sections of main adjacent to a carriageway crossing shall be gradually deepened, to allow the required cover under the carriageway without the provision of vertical bends. Similar provision shall be made to give the necessary cover over valve spindles, ie 150mm minimum cover.

6.L Pipe Bedding

6.L.1 Watermain pipes shall be bedded on suitable fine granular material, either natural or imported. All watermains under carriageway shall have sand or fine granular bedding and surround. The requirement for bedding and surrounding of PVC pipe is set out in NZS 7643.

6.L.2 There shall be no sharp stones or large clay lumps in the bedding or surround. Each pipe shall be laid so that the barrel of the pipe is supported for 60 to 90o of its circumference along its entire length. The bottom of the trench shall be cut out to sufficient size to permit jointing of the pipes and all pipes shall be supported upon their barrels only.

6.M Pipe Fittings 6.M.1 Pipe fittings such as tees, hydrant tees, crosses, tapers, hydrant risers, blank caps, plugs, bends of various degrees, and surface boxes (where applicable) shall be of cast iron or other metallic material and manufacture approved by the Group Manager City Services (Galvanised iron is not acceptable). Spigot and socket PVC fittings may be used.

6.M.2 Cast iron fittings shall be cast from high quality grey iron coated with a proven corrosion preventative compound after adequate preparation. Nylon coated ductile iron fittings may also be used.

6.M.3 Flanges shall be to Table D of BS10. Fittings laid adjacent to other fittings shall have flanged joints.

6.M.4 Gaskets for flanged joints shall be to BS 5292.



6.M.5 All joints and fittings incorporating galvanised bolts shall be wrapped in Denso Putty and Denso Tape, or with an approved alternative protective sleeve. As an alternative, Stainless steel bolts may be approved by the Group Manager City Services in some situations.

6.N Anchor or Thrust Blocks

6.N.1 Cast in-situ concrete anchor blocks shall be provided at all points where an unbalanced thrust occurs on all mains.

6.N.2 The design of anchor blocks shall be based on the bearing value of the site soil conditions, except that the maximum value used shall be 75 kPa. The inner face of the block shall not be of a lesser thickness than the diameter of the fittings and shall be so constructed as not to impair access to the bolts on the fittings. Concrete shall have a minimum compressive strength of 17.5 MPa at 28 days .

C7 A protective membrane to prevent abrasive damage to the water main should be provided between the pipe (irrespective of the pipe material) and the concrete anchor and thrust blocks.



6.P Connections to Private Property

6.P.1 Point of Supply to Consumer The point of supply to the consumer will be determined by the Group Manager City Services in accordance with Council policy on metering of supply and on water mains in private property. Every separable dwelling or tenancy shall have its own toby at the point of supply. A “V” notch shall be marked on the top of the kerb directly fronting each connection. Unless required otherwise by the Group Manager City Services , the following practice shall be followed:

C8 Also refer to Appendix for copy of TDC Water Supply Bylaw. Tobies need to be located where customers can easily locate their taps in case of emergency. That is why it is required to be located at the driveway. Also the service pipe is not permitted to be placed in an easement over someone else’s property but rather must be located in a ROW if it is to service rear lots.

(a) In front lots (or dwelling units with individual street

frontage) the service connection shall be at the street boundary. The service pipe shall be terminated 300mm on the street side of the front boundary and next to the electricity and telephone connections with a manifold incorporating a toby valve, a dual check valve, a meter and a service connection box all of a type approved by the Group Manager City Services (see Drawing W9).

(b) Back lots (or dwelling units without individual street frontage) of up to two dwelling units shall have separate service connections at the street frontage, as in (a) above. In private ways serving 3 or more rear dwelling units a 50mm ID rider main shall be laid in the Right of Way with separate service connections off that rider main for each lot or dwelling. The connection toby valve is to be within the right of way, adjacent to the lot served.

The rider main and service pipes, up to the toby valves, are to have easements in favour of Council over them. This requirement shall apply to any development of a rear lot that results in three or more dwellings served by a single access, and may involve the removal of existing service pipes and the installation of new tobies.



(c) The connection is to have 350mm cover (± 50mm) (d) Body Corporates and Multi unit developments shall either construct internal water mains and individual connections as per standard “greenfields” subdivisional development and vest these with easements in Council or install a bulk supply meter and backflow at the road frontage plus individual meters on the internal connections and retain supply in Body Corporate ownership. Refer to TDC – Water Supply Bylaw for further details. (e) Each Industrial / Commercial lot shall have the point of metered supply service connection located as per (a) and (b) above except that for connections larger that 20mm diameter the backflow prevention system shall be located on the property side of the boundary / R.O.W (as applicable) as close as practicable to the metered supply.

C9 Developments with private roads including Papakianga housing, Maori roadways ,retirement villages etc will also be treated as per (d)

6.P.2 Diameter and Pipe Materials Service connections to individual dwellings shall be 20mm ID, 12 bar, polyethylene. Connections to industrial and commercial properties may be larger and be of other materials, subject to the approval of the Group Manager City Services .

6.P.3 Tapping Bands Each service connection to a principal main or rider main shall be by means of a tapping band except for 50mm which shall use a multi-fit system.

The tapping band for each service connection shall be sited next to the electricity and telephone connections, close to a side boundary. It shall be at the house side of, and clear, of the driveway to rear lots.

Tapping bands are to be dezinc resist cast bronze or other approved material.

6.P.4 Construction The connections shall be tested in conjunction with the mains. Service connections shall normally be laid at right angles to the boundary.

C10 In industrial and commercial developments, approval may be given to omit tapping bands and service connections until the specific requirements of the consumer are known."



6.P.5 Service Connection Box Service connection boxes, manifolds, water meters and backflow preventers shall be of a type approved by the Group Manager City Services and shall be installed at subdivision stage. Water meters shall be concentric meters to BS 5728 Part 7, with Class C metrological characteristics, and a meter designation N1.5.

6.P.6 Service Connection Location Tobies need to be located where customers can easily locate their taps in case of emergency. That is why it is required to be located at the driveway. Also the service pipe is not permitted to be placed in an easement over someone else’s property but rather must be located in a ROW if it is to service rear lots.

6.Q Backfilling and Reinstatement 6.Q.1 Carriageways All pipe trenches under carriageways shall be backfilled using an approved backfill placed immediately above the pipe surround and compacted in layers not exceeding 250mm in depth.

On existing streets the top section of the trench shall be backfilled using AP basecourse and sealed. The depth of basecourse and type of seal shall conform to the standard of the existing road construction and to the Group Manager City Services requirements.

6.Q.2 Berms Pipe trenches under grass berms and footpaths shall be backfilled in accordance with the requirements of 12.5 to 12.8 of NZS 4452.



6.R Testing and Disinfection

After backfilling and before being put into service, all pipes, valves, house connections and other fittings shall be disinfected.

C11 A successful test leaves a detected chlorine residual after 24 hours.

6.R.1 Testing and Acceptance

(a) The developer may undertake a test of the water mains prior to backfilling. The acceptance test will however be undertaken after the installation of the connections, but prior to connecting to existing reticulation. Before undertaking the acceptance test the pipes will have been filled with water and held at local mains pressure for at least 24 hours. Each section of the reticulation shall be tested by the developer in the presence of the Group Manager City Services representative. The test shall be carried out and all necessary apparatus supplied by the owner. The reticulation shall withstand a pressure of 1400 kPa measured at the lowest point of the section under test, or 1.5 times the working pressure at any point in the system, whichever is the greater. The pressure shall be maintained for a period of 15 minutes, and during the period of the test, the leakage shall not exceed one litre per ten millimetres of pipe diameter per kilometre length of pipeline per hour.

(b) A Certificate of Subdivision Construction is to be

submitted (Drawing W10).

6.R.2 Disinfecting After backfilling and before being put into service, all pipes, valves, house connections and other fittings shall be disinfected.

C12 A successful test leaves a detected chlorine residual after 24 hours.

6.S Water Mains to be Kept Charged After any watermain has been laid, tested and disinfected, it shall be kept continually charged with water and under pressure. If the permanent connection to the existing reticulation is delayed, a temporary small diameter connection shall be made from the existing reticulation. The pressure shall be maintained while electric power and underground services are being laid in the vicinity of the main.



6.T Connection to Existing Water Reticulation 6.T.1 The physical work of connecting to the existing reticulation will be by a contractor who is authorised by Council to undertake such work. The consent holder will be issued with a Water Connection Consent once the new pipes have successfully passed the acceptance test. The connection paper will be passed to the authorised contractor who will in turn, after making the connection, complete the details and return the form to Council. 6.T.2 Where such connections are required the consent holder shall terminate the new main approximately 1m from the existing main at the appropriate level. 6.U Special Measures in Corrosive Soils 6.U.1 Saline Soils On PVC ridermains, either a reducing tee or an aluminium bronze tapping band shall be used for each service connection. 6.U.2 No galvanised or mild steel or brass fittings or bolts and nuts shall be used, with the exception of those bolts and nuts which are an integral part of assembled tarcoated valves and hydrants. All other bolts, nuts, and washers shall be of aluminium bronze and fittings shall be of gun metal.

6.V Special Measures for Pumping or Storage or Both The provisions of service storage or reticulation pumping installations or both together will normally be the responsibility of Council, except in special cases where established practice may require the cost to be apportioned between the interested parties.

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