Page 129 - The City and Guilds Textbook: Plumbing Book 1 for the Level 3 Apprenticeship (9189), Level 2 Technical Certificate (8202) and Level 2 Diploma (6035)

Chapter 2 Common processes and techniques

Boss pipe adapters Pipe clips Waste pipe manifolds Polypropylene push-fit waste pipe fittings
Polypropylene pipe is supplied in 3 m lengths and in various colours, including
white, black, grey and brown. Some of the most common fittings are shown in
Table 2.30.
 Table 2.30 Polypropylene push-fit waste pipe fittings

90° bends 90° swivel bends 45° bends

Swept tees Sockets Reducers

Proprietary fittings

Proprietary fittings are those that will connect tubes and pipes of different
materials such as copper and lead or lead and medium-density polyethylene
(MDPE). There are several different types of proprietary fittings, including
leadlocks and Philmac. These are described in Table 2.31.
 Table 2.31 Proprietary fittings: leadlocks and Philmac

Leadlocks Leadlocks are specially made to connect lead pipe
to copper tubes. These, however, promote galvanic
corrosion between the copper and the lead, and so
should be used only as a temporary connection.

Philmac Philmac fittings are truly universal because they will
connect almost all known pressure pipes and tubes
together by the use of special inserts that fit into a
generic fitting body.

3 PREPARATION TECHNIQUES

The successful installation of a domestic hot and cold water system or a
domestic central heating system is the result of a series of processes. These
involve design, planning, installation, commissioning and maintenance activities,
all of which you will be involved in during your career as a plumber.
Installation processes, however, are not just about successful installations. Much
of a plumber’s work involves other tasks, including repair, maintenance, removal,
replacement and decommissioning of existing installations.
Much of the work we do involves the need for skills other than the bending and
jointing of tubes and fittings – for example, the installation of a central heating
system may involve taking up floorboards and the making good of any holes
made in brickwork.
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