AAV venting three WCs

seasickstevie · 11 Dec 2011

Got three WC's running into an internal stack. As the roof is being re-tiled, I would prefer to eliminate the need to vent through the roof. Is it acceptable to use an AAV with more than one toilet?
Also a bath & two showers into same stack.

Hugh Jaleak · 11 Dec 2011

Is there another vent on the system?

seasickstevie · 12 Dec 2011

I thought that question would come up. Unfortunately not, but if essential I could install one up the middle of the house through the roof on the rear. That way it wouldn't interfere with the aesthetics at the front (I'm very fussy

)

If I did that, would a smaller that 110mm be acceptable, considering three loos, bath & two showers and washbasins?

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AAV venting three WCs

seasickstevie

Hugh Jaleak

seasickstevie

DIYnot Local

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