Vaillant ecoTEC plus VUI Series Installation And Maintenance Instructions Manual page 23

7.7.1.1 Direct Connection to internal soil and vent
stack
Preferred option
7.7.1.2 Direct connection to external soil and vent
stack
≤ 3 m
7.7.1.3 External termination to gulley or hopper
≤ 3 m
Best practice
7.7.1.4 Internal termination into combined sink
waste
≤ 3 m
0020308121_04 Installation and maintenance instructions
Ø22mm
Ø22mm
Ø 32mm
Ø22mm
Ø 32mm
100mm
Ø22mm
Ø32mm
Preferred option for external termination
7.7.1.5 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
7.7.1.6 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
1
100 mm
2
3
4
5
6
4 Bottom of sealed tube
5 Limestone chippings
6 Hole depth 400 mm
minimum
Ø22mm
100mm
Ø32mm
Ø12
25
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