Glow-worm Betacom 4 - Page 20

20 Installation and maintenance instructions Betacom 4 0020238424_04
7.6.1.4 Internal termination into combined sink
waste
Ø32mm
Ø22mm
≥ 3 m
100mm
Preferred option for external termination
7.6.1.5 External termination into soakaway
< 500 mm
100 mm
< 300 mm
50 25 25
< 25
25
Ø12
Ø32mm
≤ 3 m
1
2
3
4
5
6
1 Ground (either/or)
2 Seal
3 Plastic tube,
100 mm diameter
4 Bottom of sealed tube
5 Limestone chippings
6 Hole depth 400 mm
minimum
Least preferred option, must not terminate in rain water drain
7.6.1.6 Internal termination downstream of sink
waste
100mm
Ø32mm
Ø22mm
≤ 3 m
Open end of pipe direct into gulley below ground level but
above water level
Susceptible to siphonage, must terminate in a gulley
7.6.1.7 External termination into rain water down
pipe
≤ 3 m
Ø22mm
Ø 32mm
NB only combined foul/rainwater drain
7.6.1.8 Additional methods of introducing air breaks
1
2 3
1 Air break
2 Using a tundish
3 Using a pipe
7.6.1.9 Connection of condensate pump
Ø32mm
Ø22mm
≥ 3 m
Preferred option for external connection