Installing the System Piping 39
1
6
4
10
≥25
≥100
5
8
3
9
75
7
2
#
Description
1
Boiler
2
Visible air break
3
75 mm trap
4
Sink, basin, bath or shower
5
Open end of condensate drainage pipe direct into gully 25
mm min below grating but above water level; end cut at 45°
6
Sink lip
7
Minimum internal diameter 19 mm
(fall at least 45 mm per meter)
8
Pipe size transition
9
Minimum internal diameter 30 mm
10 Water/weather proof insulation
75mm min
ø22 mm
1
2
3
6
5
4
# Description
1
Condensate discharge from boiler
2
Visible air break
3
Condensate pump
4
Visible air break at plug hole
5
Sink or basin with integrated overflow
6
75 mm sink waste trap
75
450
1
7
6
4
2
3
5
# Description
1
Boiler
2
Visible air break
3
75 mm trap
4
Soil and vent stack
5
Invert
6
450 mm minimum up to three storeys
7
Minimum internal diameter 19 mm
(fall at least 45 mm per meter)
1
5
7
9
10
3
2
≥100
75
8
6
4
≥25
#
Description
1
Boiler
2
Visible air break
3
Visible air break at plug-hole
4
75 mm sink, basin, bath or shower waste trap
5
Sink, basin, bath or shower with integral overflow
6
Open end of condensate drainage pipe direct into gully 25mm
min below grating but above water level; end cut at 45°
7
Minimum internal diameter 19 mm
(fall at least 45 mm per meter)
8
Pipe size transition
9
Minimum internal diameter 30 mm
10 Water/weather proof insulation
