Air Admittance valve

cantgetright

Is it possible to cut 110mm in soil stack in bathroom and place a durgo valve on pipe to act as vent pipe. is this how these valves operate?
Thanks in advanve

BaZmO*

cantgetright wrote: »

Is it possible to cut 110mm in soil stack in bathroom and place a durgo valve on pipe to act as vent pipe. is this how these valves operate?
Thanks in advanve

In short.....Yes.

In length.......

Underground drainage systems are traditionally ventilated
by ventilating stacks that terminate in an end open to the
atmosphere. The Durgo valve was designed to reduce the
number of ventilating pipes and roof penetrations in
domestic, institutional and commercial sanitary plumbing
systems without affecting drainage performance.
Durgo valves are supplied complete to suit 50mm, 82mm
and 110mm pipework suitable for use in above ground
sanitary pipework system designed in accordance with
BSEN 12056:2000, Parts 1 to 5. When the system is sub-
ject to negative pressure the valve diaphragm lifts from
its seating and allows air to be drawn into the pipework.
If positive pressure occurs the diaphragm returns to the
closed position to prevent foul air entering the building.
Durgo valves should always be fitted in a vertical position
above the flood level of the highest sanitary appliance.
They should be installed within the building in a
non-habitable location, e.g. duct or roof or ceiling space,
where there is no risk of freezing and where they are
accessible for maintenance.
Durgo valves are supplied complete with insulating
cover which should be left in position after installation,
for protection

Joey the lips

I have seen this done a lot. But have never done it. It seems to be a fad with attic conversions where people move there bath into the ensuite.

I would suggest an easier way is to run a 2" pipe with the beams in the attic. Bring the 2" down inside the stud(Just about) and connect it into the 4". Again I have never had to do this but know that 2" is legally the smallest you can go.

cantgetright

Joey the lips wrote: »

I have seen this done a lot. But have never done it. It seems to be a fad with attic conversions where people move there bath into the ensuite.

I would suggest an easier way is to run a 2" pipe with the beams in the attic. Bring the 2" down inside the stud(Just about) and connect it into the 4". Again I have never had to do this but know that 2" is legally the smallest you can go.

Cheers Joey
I was thinking about reducing down to a smaller pipe but the timber battons are only 2"x1", its just enough to drop down a 1/2" cold pipe for toilet. So thats why i tought of durgo valve but dont know if next doors soil stack would act as vent as i live in a terraced house.

Joey the lips

cantgetright wrote: »

Cheers Joey
I was thinking about reducing down to a smaller pipe but the timber battons are only 2"x1", its just enough to drop down a 1/2" cold pipe for toilet. So thats why i tought of durgo valve but dont know if next doors soil stack would act as vent as i live in a terraced house.

Be careful how much you reduce. I think the legislation says 2" is the min. Although the builders that done my house used a 1.1/2" Up through the stud and there does not seem to be any problems.

stapeler

I installed one a few years back as my en-suite toiled had a poor flush. Soil pipe runs horizontal in attic space so handy enough to get to. I used a 2" hole saw and drilled into the top surface of soil pipe, placed a soil strap around it and pushed in the durgo valve (needs to sit vertically). Cost around €15 for the lot and 20 mins work. Made a huge difference.

cantgetright

stapeler wrote: »

I installed one a few years back as my en-suite toiled had a poor flush. Soil pipe runs horizontal in attic space so handy enough to get to. I used a 2" hole saw and drilled into the top surface of soil pipe, placed a soil strap around it and pushed in the durgo valve (needs to sit vertically). Cost around €15 for the lot and 20 mins work. Made a huge difference.

I want to install mine just above the toilet cistern on the vent pipe and eliminate the rest of the vent.

stapeler

cantgetright wrote: »

I want to install mine just above the toilet cistern on the vent pipe and eliminate the rest of the vent.

Pick up a reducer to 2" and it should be fine. Most important is that the valve is mounted vertical.