Vaillant ecoTEC plus VU Series Installation And Maintenance Instructions Manual page 21

7.8.1.3 External termination to gulley or hopper
≤ 3 m
Best practice
7.8.1.4 Internal termination into combined sink
waste
≥ 3 m
Preferred option for external termination
7.8.1.5 External termination into soakaway
Ø32mm
≤ 3 m
< 500 mm
1 Ground (either/or)
2 Seal
3 Plastic tube,
100 mm diameter
Least preferred option, must not terminate in rain water drain
0020238195_07 ecoTEC plus Installation and maintenance instructions
Ø22mm
Ø 32mm
100mm
Ø22mm
Ø32mm
1
100 mm
2
3
4
5
6
4 Bottom of sealed tube
5 Limestone chippings
6 Hole depth 400 mm
minimum
7.8.1.6 Internal termination downstream of sink
waste
≤ 3 m
Open end of pipe direct into gulley below ground level but
above water level
Susceptible to siphonage, must terminate in a gulley
7.8.1.7 External termination into rain water down
pipe
Ø22mm
Ø 32mm
NB only combined foul/rainwater drain
7.8.1.8 Additional methods of introducing air breaks
Ø12
25
1 Air break
2 Using a tundish
Ø22mm
100mm
Ø32mm
1
2 3
3 Using a pipe
≤ 3 m
21