65
External Connections
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 75mm incorporated into the boiler.
5 Soil and vent stack
6 Invert
7 450mm minimum upto three storeys
8 Minimum internal diameter 19 mm
9 Pipe size transition point
10 Minimum internal diameter 30mm
11 Water/weather proof insulation
Figure 4 – Connection of condensate discharge pipe to external soil and vent stack
1
2
10
5
9
4
8
3
7
6
11
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