Page 574 - 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

Flush pipe Cistern
Pressure reducing valve sealed
against the pan

195mm
100mm

p Figure 9.16 A single trap siphonic WC pan p igure 9.17 A double trap siphonic WC pan
F

WC styles
WCs can be manufactured in five main styles, as described below.
1 Close coupled: the WC pan is designed to have the cistern bolted to the back
of the pan to form one unit.

Brass large headed bolt
Rubber and metal washers
Sealing washer

Rubber and metal washers
Wing nut

p Figure 9.18 A close coupled WC suite p Figure 9.19 A diagram showing how the cistern is fixed to the WC pan

2 Low level: the cistern is connected to the WC pan by a short flush pipe to
convey the water from the cistern to the WC pan.

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