AAV under basin in bathroom?

[oranjeboom]

Working out the bathroom pipe runs I will probably need to fit an AAV to reduce vacuum issues as I won't have a soil stack going up through the roof or up the side of the house. The soil pipe from bathroom goes down through the slab and outside into adjacent inspection chamber (2m away). The soil pipe that serves toilet will also drain the basin and bath, so my thought was to simple locate an AAV under the basin (boxed in, but accessible). Would that do the trick? Excuse the 'drawing' below. It's late....

 

As an aside, I realise I will also need to vent to atmosphere the outside foul drain and was going to achieve this  by adding an exterior vent pipe in an outside hedge if the BCO really insist.

 

 

Edited March 6, 2019 by oranjeboom

[Ed Davies]

Not sure but shouldn't the AAV be above the highest water level in the associated thingies? So above the overflow in the basin, presumably.

[Gone West]

According to the instructions, the AAVs I've used can be used below maximum water level height, although I have placed them just above.

[Ed Davies]

Thanks, I was going to pipe mine up to the loft but, on reflection, it'll be easy to box it in (accessibly) to just above the basin.

[oranjeboom]

Thanks Peter, Ed

 

Yes, was going to box it in anyway as going into the attic would mean an ugly boxed in section in the corner somewhere.