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Internal Condensate Pipe Discharge Termination
Figure 2(a) – Connection of a condensate discharge pipe downstream of a sink, basin, b
shower waste trap.
Note – Check manufacturer’s instructions to see if an air break is required.
Key
1 Boiler
2 Visible air break
3 75 mm trap
4 Visible air break and trap not required if there is a trap with a minimum condensate seal
of 75 mm incorporated into the boiler. In this case the 100 mm is measured to the trap
in the boiler.
5 Sink, basin, bath or shower
6 Open end of condensate discharge pipe direct into gully 25 mm min below grating but
above water level; end cut at 45 °
Note – the maximum external condensate discharge length is 3 metres
7 Sink lip
8 Minimum internal diameter 19 mm
9 Pipe size transition
10 Minimum internal diameter 30 mm
11 Water/weather proof insulation
12 Drain cover/leaf guard
1
2
10
5
9
4
8
3
7
6
11
12
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