Mystery pipe running off soil pipe vent in loft to bathroom

scep · 17 Feb 2010

Taking the old shower out and found a waste pipe coming into the shower waste. Traced this up to the loft - it runs across the loft and joins the soil pipe.

I can't work this out - is it a (necessary) vent? It surely can't be an overflow?!

Any ideas? It's a pain as it is in the way of the new shower tray. Thanks.

Burnerman · 17 Feb 2010

It sounds like an air admittance pipe - just to help the shower water on its way. May not be necessary at all!
John

Nige F · 17 Feb 2010

Bit of an Old Skool vent

Not lead pipe is it . Just use a Hep V O waste valve on the shower instead of a trap...or as well as if you`ve got one o those horrible shallow shower traps

And take the guts out of it so it just forms a "well" and let the Hep valve do the job of air admittance /anti backflow .

scep · 17 Feb 2010

It's not lead, just standard grey plastic. Suspect it is part of the original 1970 plumbing...

Yes, it is a shallow tray - seemed a good idea at the time

Why do you need a trap as well as a Hep vO?

ManxPlumber · 17 Feb 2010

Trap prevents ingress of foul air

scep · 17 Feb 2010

I thought that was one of the functions of the HepVO - acting as an AAV but also as a one way valve for water and foul air.

Nige F · 18 Feb 2010

A trap can pull out/let smells back.The shallower the seal the more chance it will. A Hep wont, and as you say acts as a aav.

scep · 18 Feb 2010

cheers

diynot

If you need to find a tradesperson to get your job done, please try our local search below, or if you are doing it yourself you can find suppliers local to you.

Select the supplier or trade you require, enter your location to begin your search.

Are you a trade or supplier? You can create your listing free at DIYnot Local

Mystery pipe running off soil pipe vent in loft to bathroom

Similar threads