The top of my bathroom waste pipe has an air admittance valve (Durgo), but in the past few days the toilet and shower have started 'gurgling' when the bath is emptied. If I give the valve a helping hand with my finger then air gets in and the bath empties fine so I'm guessing that the Durgo is 'sticking'.
Is there anything that can be done to maintain a Durgo?
If not, I think the existing one is solvent welded in place, how can I go about getting the existing one out?
Also, the Durgo is installed less than a foot above floor level but I have read that it should have been installed higher than the sink overspill. Could this make a difference? What could happen if it stays at this height?
Gareth
Is there anything that can be done to maintain a Durgo?
If not, I think the existing one is solvent welded in place, how can I go about getting the existing one out?
Also, the Durgo is installed less than a foot above floor level but I have read that it should have been installed higher than the sink overspill. Could this make a difference? What could happen if it stays at this height?
Gareth