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The manhole is clear mate, I've had a CCTV drainage survey done and there are no blockages anywhere, no leaks, cracks etc. I think maybe the shower trap hasn't been installed correctly? Is too close to the wc maybe? Next job is to fit an in line (self closing air) trap to the shower to...

Because every time I flush the wc, the shower trap bubbles away and then we get foul smells in the bathroom. I figured that the vent was not letting air in, so the the vacuum pressure was sucking out the trap instead. I was wrong though, as I have removed the vent now so the svp is open...

Evening, I think I have a faulty AAV but I can't get to it to check. It is push fit and moves, bit sits directly below the bottom rail or my roof truss, the top of the AAV hits the roof truss before it comes off and won't move any further. The AAV is also boxed in, and is really close...

Boxed in AAV under roof truss

Thanks guys....and Hugh especially..thanks for all posts, much appreciated!

Right guys, I have finally figured out where the smell is coming from....thank god.....it is from the waste pipe to the basin. The waste pipe is 35mm thick, it is connected to the basin trap, and then drops through a concrete floor into a vertical drain (looks to be 110mm thick). There is...

The soil pipe is completely concealed through the house, it's behind a kitchen cupboard and is boxed in by plasterboard even if I remove the cupboard. I have taken off the plinth to the kitchen units but it is even plasterboard boxed down to the floor. Upstairs the pipe is fully concealed by...

Thanks spraggo, The aav is brand new though, purchased from wickes only a few days ago. I've checked it and it doesn't look like it sticking. Are there different types or air flows? Have I got the wrong type? Have I fitted it incorrectly? It was push fit so went on well and looks fine. The...

Thanks guys, The floor is old thermoplastic tiles and is as dry as a bone, so don't think it's urine. The smell comes and goes too, I deffo think it is gases from svp. Is taking the aav off in the loft a good idea? Just for a few days. If the smell goes downstairs then I know I have to...

Hi, Hoping someone can help. I have just bought a house, moved in, and it stinks! The smell comes from the downstairs wc. The wc had a toilet a basin, a carpet floor and an extract vent. The house was built in 1989 and has an internal soil pipe which terminates in the loft with...

Yep, checked it all, no joy! Any ideas?

Snash, did you ever find the problem. I have the same problem now, a really bad damp smell, it's not sewage and all the pipes are clear, everything is dry too, I've removed the carpet etc, any ideas would be appreciated