7 Plumbing Materials

7/30/2019 7 Plumbing Materials

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NGfL CYMRU GCaD

www.ngfl-cymru.org.uk

PLUMBING MATERIALS,

PIPE BENDING ANDPRESSURE TESTING


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PLUMBING MATERIALS


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Pipes are used to connect various plumbing elements

together, to form a plumbing system.

PLUMBING MATERIALS


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Pipes are used in the supply of gas,

drinking water, water in heating systems,

and in drainage.

Pipes can be made from plastic, copper,

stainless steel, or cast iron.

PLUMBING MATERIALS


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Pipes are colour coded to show what they carry.

Underground gas pipes are yellow: inside a building, gas

governors are also painted yellow.

PLUMBING MATERIALS


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Water supply pipes can be blue in colour. Alternatively, copper pipes can be usedfor water supplies, but lead pipes cannot be used. The above picture shows a

temporary water supply during a site redevelopment.

PLUMBING MATERIALS


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www.ngfl-cymru.org.ukPipes for foul drains are coloured brown.

PLUMBING MATERIALS


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Pipes carrying water to heat or cool a building, or that supplyhot water, are heavily insulated. This reduces heat loss and

energy costs.

PLUMBING MATERIALS


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Connections between pipes can be made with compression

fittings (shown below), or by soldering pipes together, as follows:-

PLUMBING MATERIALS


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Wire wool is

used to clean

the ends of

connectors(shown left)

before pipes

are soldered

together.

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Flux is applied

to prevent

oxidisation ofthe surfaces.

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Pipe work is heated using a blow lamp. Solder is melted to a liquid with

the blow lamp, and is used to weld connectors and pipes together. Oncecooled, the solder returns to a solid, forming a watertight seal.

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Pipes are fixed in

place using special

brackets. Once pipes

are joined, water canbe run through them

to pressure test the

pipework.

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Lead sheet is used to

make flashingsaround chimneys and

flues.

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Components are joined together using oxy-

acetylene torch welding.

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Pipes are bent to shape using pipe bending tools. Theseries of images shown next show pipe being bent.

PLUMBING MATERIALS


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www.ngfl-cymru.org.ukPipework is earth bonded.

PLUMBING MATERIALS

7 Plumbing Materials

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