Page 551 - 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 8 Rainwater systems

4 There is no restriction to the number of bends that can be installed on
rainwater pipes.
5 Where two rainwater pipes converge, it is possible to take both into a hopper
head (Figure 8.23).
6 The distance between the rainwater pipe clips is shown in Table 8.8. Before
installing the rainwater pipe clips, always check the clip distances in the
manufacturer’s instructions.
 Table 8.8 Distance between the rainwater pipe clip
p Figure 8.23 A hopper head
Rainwater clip support centres
Pipe size Vertical (m) Horizontal (m)
55 mm 1.2 0.6
62 mm 2.0 1.2
68 mm 2.0 1.2
70 mm 2.0 1.2
82 mm 2.0 1.2
110 mm 2.0 1.2

7 Measure the required distance for the clips, mark and drill the rainwater
pipe clips, and screw the clips and pipe against the wall using wall plugs and
50 mm × 10 alloy or stainless steel screws.

Jointing guttering of different materials
and profiles

Occasionally, it may be necessary to make joints between systems of guttering
that use different materials or profile shapes. This can be done easily using
specific adapter fittings. Gutter adapters include:

l half round PVCu to half round cast iron
l half round PVCu to Ogee PVCu
l half round PVCu to Ogee cast iron
l half round PVCu to square section PVCu.
 Table 8.9 Styles of gutter adapter fittings

Gutter-to-gutter adapters

p Figure 8.24 Rainwater pipe clips

p Figure 8.25 Connections to existing cast iron gutters
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