Do i need a vented soil stack?

panda2006 · 23 Jan 2008

hi guys i live in a ground floor bungalow, which has had an extension built, i am in the process of fitting a bathroom suite but i need to know if the toilet needs a vented stack, the bathroom suite up the other end of the house which goes into the same drain, has a vented soil stack fitted outside, so does my new one need one too?
cheers
karl

Richard C · 23 Jan 2008

You can discharge a ground floor w/c directly into an unvented drain but the depth from the floor to the drain invert must be less than 1.3m. Better you have a read of Part H as other things you are doing may make you decide to use a vented stack;
http://www.planningportal.gov.uk/england/professionals/en/1115314110382.html
You can always use an air admittance valve if you don’t want to fit a fully vented stack.

Doctor Drivel · 23 Jan 2008

Richard C said:
You can discharge a ground floor w/c directly into an unvented drain but the depth from the floor to the drain invert must be less than 1.3m. Better you have a read of Part H as other things you are doing may make you decide to use a vented stack;
http://www.planningportal.gov.uk/england/professionals/en/1115314110382.html
You can always use an air admittance valve if you don’t want to fit a fully vented stack.

If he is less than the 1.3 metres, a HepVo trap on the wash basin and any other appliance would be a very good idea, as they are also air admittance valves too. Neat and easy, and solves at lot.

panda2006 · 26 Jan 2008

the depth of the drain pipe is about 1m i can add a vented stack outside because i can expose the pipe and cut into it and install vented stack would you advise me to do this??

Richard C · 26 Jan 2008

panda2006 said:
the depth of the drain pipe is about 1m i can add a vented stack outside because i can expose the pipe and cut into it and install vented stack would you advise me to do this??

Why, 1m is less than 1.3m isn't it

! I've already said the regs. state you don’t need a vent stack as long as the drain invert (the straight bit) is less than 1.3m from the floor; follow the link to Part H if you want to confirm.

I don’t have a stack on my G/F cloaks & there are no problems with drawing the hand basin waste trap so I don't have a vent on that either.

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Do i need a vented soil stack?

panda2006

Richard C

Doctor Drivel

panda2006

Richard C

DIYnot Local

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