Hi. I have the following:
Toilet, sink and shower on ground floor to below floor waste
110mm from the toilet running up a corner in the ground floor to:
toilet, sink and shower on the first floor.
There is no roof vent, so I want to use an AAV on the first floor.
Do I have to use one as big as 110mm, or can I fit an off centre reducer, (sorry, not sure what this would be called, to, say, a 40mm pipe up the corner of the room, ending in a smaller AAV above the height of the sink waste.
Sorry of this is unclear, if it is, happy to explain further.
Toilet, sink and shower on ground floor to below floor waste
110mm from the toilet running up a corner in the ground floor to:
toilet, sink and shower on the first floor.
There is no roof vent, so I want to use an AAV on the first floor.
Do I have to use one as big as 110mm, or can I fit an off centre reducer, (sorry, not sure what this would be called, to, say, a 40mm pipe up the corner of the room, ending in a smaller AAV above the height of the sink waste.
Sorry of this is unclear, if it is, happy to explain further.