I have a customer with an internal toilet fitted to a 1.5m SVP with an air admittance valve on top ,the push on type with a rubber boot and not solvent welded.
The trouble is the pan keeps backing up but when i remove the rubber boot or the valve the pan clears .
Is there anything on the market that would solve this problem.
Drainage firms have been but failed. and i have tried 2 types of air admittance valves.
Thanks for any replies
Tim
The trouble is the pan keeps backing up but when i remove the rubber boot or the valve the pan clears .
Is there anything on the market that would solve this problem.
Drainage firms have been but failed. and i have tried 2 types of air admittance valves.
Thanks for any replies
Tim