DIY Doctor

Main navigation

Its causing quite a stink! - sewer smells

Postby interduct » Sun Dec 16, 2007 7:32 pm

I have been in my house for about 2 years - it was a new build. Since it was first build there has always been intemittent sewer smells eminating in the various bathrooms. There are four bathrooms - the main one on the first floor is connected to a soil vent pipe that exhausts through a roof vent. The first en-suite is also connected to another soil vent pipe that used to exhaust through a roof vent - it now has an AAV fitted as this room often had the most consistent smells and it always seemed like it was coming back through the bathroom extractor that was always quite drafty. There is also another en-suite and a cloakroom below it that are connected to a further soil vent stack that is capped in the loft with an AAV.

Over the last week or so the cloakroom is smelling like rotten cabbage and at worst like a sewer. This evening I have dismantled the pipe work from the small sink in the cloakroom and the standard pipe is fittted through a flexible rubber adaptor into a standard 100mm drain pipe bend. To my surprise there is quite a positive air pressure coming up from the drain and I suspect that this will be driving the smell through the weakest joints - I only fitted the AAV to the other stack last week. What do I do now, is it worth capping the only remaining vent to air with an AAV as the houses adjacent can provide the air exhaust for the drains. I don't want to do this if it makes it worse.

Any suggestions or similar experiences would be appreciated. I can normally fix anything but this one has got me baffled.

Rank: Labourer
Progress to next rank:
Posts: 1
Joined: Sun Dec 16, 2007 7:22 pm


Simply Build It

Postby roger196 » Mon Dec 31, 2007 6:52 pm

Have you asked your neighbours if they have similar problems. Might be worth asking local authoriy building inspectors for advice as this is a new build.
Rank: Ganger
Progress to next rank:
Posts: 84
Joined: Mon Nov 05, 2007 7:51 pm

Postby bogeyman » Wed Apr 09, 2008 11:03 am

I get the exact same problem now and again. It's not so bad now but it used to be really bad. What i did was reseal around the toilet bowl outlets via the wavin adapter. On a couple of them the rubber seal was slightly crooked and this was enough to make it bad. I still get it now and again and even at the moment i'm getting smells through the sinks and showers because of blocked soakaways...i hope
Like you mine is a selfbuild and is independent of council drains etc, so i know how you feel and always through the en suites ..anyway hope this helps.
Rank: Labourer
Progress to next rank:
Posts: 4
Joined: Wed Apr 09, 2008 8:39 am

Display posts from previous
Sort by
Order by

  • DIY How to Project Guides
  • DIY how to tutorial projects and guides - Did you know we have a DIY Projects section? Well, if no, then we certainly do! Within this area of our site have literally hundreds of how-to guides and tutorials that cover a huge range of home improvement tasks. Each page also comes with pictures and a video to make completing those jobs even easier!

  • Related Topics