I am refitting my ensuite which currently vents off a stack through the roof. There is a shower, WC and basin all on the same stack. My plumber has suggested fitting a Durgo/AAV and removing the stack to give more space in the bathroom. The AAV would be at around the same height as the basin overflow but higher then the WC overflow and shower. I have read that AAVs should be higher (ideally 50mm+) than the highest overflow. (The main bathroom and downstairs cloak all vent through a separate stack to a different part of the outside sewer). Does anyone have any advice on this one?
Also is any AAV as good as a bona fide Durgo or should I try and fit the original?
Thanks for any advice - Iain
Also is any AAV as good as a bona fide Durgo or should I try and fit the original?
Thanks for any advice - Iain