64
External Connections
Figure 6 –
External drain, gully or rainwater hopper
Key
1
Boiler
2
Visible air break
3
38mm 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 – refer to manufacturers instructions
5
External length of pipe 3 m maximum
6
Open end of condensate discharge 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
11
Fit drain cover/leaf guard
1
2
10
5
9
4
8
3
7
6
11
October 2018 Issue 1.0
