Air admittance valve

sadie100 · 22 Mar 2012

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

Nige F · 23 Mar 2012

an open vent will solve it

the local water co . clear drains now -they have adopted a lot more of the runs

there is probably a blockage further down - it`s a common problem on the forum -

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Air admittance valve

sadie100

Nige F

DIYnot Local

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