I have a durgo valve fitted to the the top of the stack in the loft, this valve is not spring loaded works under its own weight, but every now and then in the night i can smell sewer gas not all the time, how would this valve become faulty! :|
Can anybody tell me if the non-return valves in the pump housings of this boiler are servicable, i think i have htg valve stuck in open position as htg flow gets hot when htw demand and htg off
When hot water demand on and no htg, flow pipe getting hot and water delivery to upstairs taps luke warm, as there is no divertor valve what is letting by?? :?