)&
Figure 6 – External drain, gully or rainwater hopper
Key
1 Boiler
2 Visible air break
3 38 mm minimum trap
4 Visible air break and trap not required if there is a trap with a minimum condensate
seal of 38 mm incorporated into the boiler
5 External length of pipe 3 m maximum
6 Open end of condensate drainage pipe direct into gully 25 mm min below grating but
above water level; end cut at 45 °
7 Minimum internal diameter 19 mm
8 Pipe size transition point
9 Minimum internal diameter 30 mm
10 Water/weather proof insulation
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