Every now and again there's a "drains" smell in the shower room that we haven't been able to track down. The room has an AAV on a secondary stack that's fed by a loo, shower, bidet and basin. All the traps are OK, and the AAV valve seems to move freely, so all I can think of is that every now and again the Durgo is lifting when there's a gust of wind (stop sniggering at the back, I meant a gust of wind outside the house). Is this a known problem? Is it reasonable to add a small amount of weight to the valve? Any other suggestions?
- posted
8 years ago