Page 128 - The City and Guilds Textbook: Plumbing Book 1 for the Level 3 Apprenticeship (9189), Level 2 Technical Certificate (8202) and Level 2 Diploma (6035)

The City & Guilds Textbook: Plumbing Book 1

Boss pipe adapters Pipe clips Waste pipe manifolds

PVCu 82 mm, 110 mm and 160 mm soil pipe is available in 2.5 m, 3 m and 4 m
lengths in a variety of colours. The pipe and fittings are manufactured to BS EN
1329–1:2000. The pipe has a socket on one end and a chamfered spigot on the
other.

Solvent weld waste pipe fittings
 Table 2.29 Solvent weld waste pipe fittings

90° knuckle bends 90° bends 45° bends

Tees Sockets Reducers

PVCu waste pipe is manufactured to BS EN 1455–1:2000 and BS 5255, and
is available in 3 m lengths in sizes 21.5 mm (overflow pipe), 32 mm, 40 mm and
50 mm.

Polypropylene (PP)
Polypropylene is a common plastic in plumbing systems. It is used to
manufacture cold water cisterns, WC siphons and push-fit waste and overflow
pipe. It is the waste pipe we will look at here.
Polypropylene waste pipe manufactured to BS EN 1451–1:2000, BS 5254 and
BS 5255 is flexible, tough and resistant to most acids and alkalis. It melts at
a relatively low temperature of 160°C and starts to soften at 100°C. For this
reason, its use as a waste pipe is limited to waste water below 100°C. It is
also adversely affected by direct sunlight and cannot be solvent welded. It is
jointed by the use of push-fit fittings, which have a rubber sealing ring inside
the fitting.

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