Soil pipe air admittance valve

[siward]

Does anyone have any experience in using these one-way valves. I have a very cramped upstairs WC that has the soil pipe inside, going up through the loft and roof. I would like to remove the upper part of this soil pipe after the toilet and fit one of these valves in its place.
Many Thanks
http://www.screwfix.com/app/sfd/cat/pro.jsp;jsessionid=XYOKJPEFJW0YPCJO2C3CIIQ?ts=33629&id=95531

 

[kevplumb]

the phrase that comes to mind is

TRY A SEARCH

dont bother with a sarcastic reply its been done

FWIW ive got a hide like a buffalo

 

[Bahco]

I don't think you can do what you wish unless you have another vent pipe installed on your system to let gases out.
Best to phone Building Control for a definitive answer.

 

[kevplumb]

yowm aright chap

 

[Bahco]

Evening Kev

 

[siward]

Thanks everyone for your help.
If I was to fit this valve, could I fit a smaller vent pipe? 40mm for example, this would greatly reduce the impact of a large soil pipe in a small room. This all may seem excessive, but I have to gut the old room anyway as I am moving the cistern and replacing a broken pan. I would rather go to extra trouble now and save as much space as possible.
Thanks again

 

[Bahco]

You may be able to reduce the dry end to 75 mm but speak to B C.
Do not go against regs as they are there for sanitary reasons.

 

[siward]

I have spoken with BC and they confirm the dry end can be reduced to 75mm. They also say I can use an air admittance valve as I am in a middle terrace house. Hence I will be removing the dry section and installing a valve.
Many thanks for your help and advice

 

[Bahco]

Thanks for the update,

A lot of people don't bother once they have got what they want.