I’m looking for guidance on whether I can get by with a 32/40/50mm AAV for a toilet connected to a septic tank – the tank receives only toilet waste, there are no other connections, no basins, no showers; nothing.
This is a remote location with 20 toilets in 20 huts spread over 50 metres, all connected to the tank. All toilets are at approximately the same elevation. 19 of the toilets have 110mm AAVs on the stacks.
Because of space limits, the final toilet (nearest the tank but still about 25m from it) can only take a 110mm AAV if the stack runs up the wall in the bathroom. I’d like to avoid this. Can we safely use a 32/40/50mm Durgo, tee’d off the soil pipe as it leaves the toilet?
If this is problematic, could we fit 2 x 50mm Durgos on the tee that comes off the same soil pipe – I presume the air restriction is the opening of the valve, not the size of pipe it is attached to?
All help appreciated.
This is a remote location with 20 toilets in 20 huts spread over 50 metres, all connected to the tank. All toilets are at approximately the same elevation. 19 of the toilets have 110mm AAVs on the stacks.
Because of space limits, the final toilet (nearest the tank but still about 25m from it) can only take a 110mm AAV if the stack runs up the wall in the bathroom. I’d like to avoid this. Can we safely use a 32/40/50mm Durgo, tee’d off the soil pipe as it leaves the toilet?
If this is problematic, could we fit 2 x 50mm Durgos on the tee that comes off the same soil pipe – I presume the air restriction is the opening of the valve, not the size of pipe it is attached to?
All help appreciated.