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I have a unvented cylinder and a external Worcester boiler with good water pressure to the house naturally. I have a new system of 4 years which has plastic piping through the house. I have noticed for the first time in 4 years that (now I have turned the heating back on this autumn) there's this tapping noise coming through a false wall, where I no full well a lot of pipes run from down stairs to up or the other way round. Could the sound simply be the pipes heating up and moving, possibly moving within clip that hold them? There is no noise when the heating is off. I assume as the system is pressurised it would leak even when off. Why can I only hear it with the heating on? I have turned it on for the second time just now and its doing the same been on an hour still doing it. No sign of damp but its behind a false wall on ground level and I have tiled floor and high tiled skirting so it might be hard to tell?
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sorted byI guessed it was expansion of the pipes against the floorboards every time they heated up. I lifted the floorboards in that area and found a pipe or pipes (I forget now, it's been a while) ran over the top of a joist (where a small amount had been cut away to accommodate the pipes.) I wrapped the pipe with suitable material... Replaced the floorboards and carpet, and haven't had any problems since.
Legacy thread.
Do you hve a pressure gauge? If there is a leak you will be losing pressure.
TBH I'd guess that it is just thermal movement and nothing to be concerned about.
Thanks for your thoughts much appreciated I was really worried and concerned to put the heating on tbh fell better now.
Also think my expansion vessel has not worked since day one. As one guy came and loosened the screw at one end and water came out, thats the end the air is supposed to be so it pressurised, he guy hadn't a clue and said its fine, I have since been told it isn't but I can't see how the system can run efficiently without a working expansion vessel for 4 years?
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Some boilers have a built in expansion vessel other have something called pump over run. The only expansion vessel I have is on my heat store which is attached to a mixer. But that's a vented heatstore system. My boiler contains it's own expansion vessel so I can turn the boiler on a off without any issues.
This was before the new boiler went in and after.
I think some radiators have bigger personalities than others but we love him for it.
Unless heating is affected or plasterboard is falling off the walls it's so wet I wouldn't be overly concerned.
Will
Not a plumber.
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Bet you wished you had done that sooner it does sound like my noise to be honest, feel like we are playing "Name that sound" or a radio stations secret sound competition I think as mines behind a wall it will be staying there as is
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Yep, wish I'd done it years earlier! Was one of those jobs I kept forgetting about and never seemed to get round to sorting.
Took me all of 20 minutes in the end!!
Anyhow, hope you get it sorted... But yeh a bit trickier it being behind a wall.
What material did you use?