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- 15 Feb 2012
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I have a new unvented system installed a few months ago. It has started to sometimes make a loud vibrating sound when a hot water tap is first turned on. The noise only lasts for a few seconds.
The installer has been out a couple of times and solved the problem for a bit but it keeps coming back. I think he was altering the pressure in the expansion vessel.
I have (on his advice) been recording the mains and EV pressure to see if there was a pattern. Last time the mains was at 2.8 bar and the EV at 3 bar. After running the tap and having the noise the mains dropped to just over 2 bar and the EV to 2.6 bar. Sometimes I have had similar readings but no noise!
Any ideas for me to suggest to the installer to cure this? He seems to be at a loss now and not keen to keep coming back. Should there be such a fluctuation in the 2 pressure readings? Should the EV pressure be lower to match the mains?
Any advice that I pass on would be appreciated. The cylinder is a stelfow 210 run off a Worcester Bosch Greenstar 30. The installer is G3 qualified.
Cheers
The installer has been out a couple of times and solved the problem for a bit but it keeps coming back. I think he was altering the pressure in the expansion vessel.
I have (on his advice) been recording the mains and EV pressure to see if there was a pattern. Last time the mains was at 2.8 bar and the EV at 3 bar. After running the tap and having the noise the mains dropped to just over 2 bar and the EV to 2.6 bar. Sometimes I have had similar readings but no noise!
Any ideas for me to suggest to the installer to cure this? He seems to be at a loss now and not keen to keep coming back. Should there be such a fluctuation in the 2 pressure readings? Should the EV pressure be lower to match the mains?
Any advice that I pass on would be appreciated. The cylinder is a stelfow 210 run off a Worcester Bosch Greenstar 30. The installer is G3 qualified.
Cheers