Search results

Mini update... AAV is currently closed and this morning I heard air bubble up the towel rail just after coming out the shower. Will keep things as they are for a few more days to be sure but looks like AAV is not the culprit. Also found a very, very small leak from the spindle on one of...

TRV stuck closed?

Hopefully as it's easy to sort. If someone's turning the tap off that tightly then it's probably dripping (or they don't know their own strength!) and it might be as simple as needing a new tap washer. (old one is probably a bit squashed!) Or possible the valve might need reseating but I'd...

Is it possible that someone's turned the tap off so tightly that the jumper has come out of its housing and now can't be wound back in?

Expansion vessel checked (0.8bar) and no leaks outside via PRV. Did wonder about that but it does seem to be related to DHW use i.e. leaving CH only running for several days doesn't seem to introduce any air but I'm not 100% sure if it was a fluke over Christmas.

I wish I knew how air could get into a sealed system full stop! I suppose somewhere in the system the pressure is (temporarily) low enough to draw air in? Over Christmas when we were away for a few days and only the CH was running (i.e. no DHW use) there didn't appear to be any air...

Thanks. I'll give it a try and report back. Out of interest, are there any examples of the kind of "system faults" that could cause this effect? (just in case I recognise any of them on my system)

I've been wondering whether it is the source but being a layman wasn't sure whether it could be :) Any issues likely to arise from running the system with it closed? If it is the AAV, what's the long term solution? (keep replacing them until I get one that doesn't do it?) Thanks

Thanks for the reply. Yep, I've done that too - it definitely won't light and/or pop etc. AAV cap is currently open. WB engineer came out two weeks ago to check the boiler, I asked him whether the AAV could be the source - he said it was fine but changed it for a new one anyway.

Thanks for the reply. Already tested - it's not hydrogen.

Nope. (thanks for the reply)

I'm hoping someone can help as this has been driving me mad for some time. I'm getting air in the central heating system, enough to mean that the top bar of a 6ft towel rail is completely cold within a week and needs bleeding. Some information: - Boiler is WB Greenstar 34CDi Classic...