Discuss Please help me - PVR clunking noise is driving me crazy in the USA area at PlumbersForums.net

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I’m being driven crazy by a pressure release value clunking on and off repeatedly for hours on end. I have discovered the pvr, which has been recently replaced, is a 3 bar (the one before was 6bar). I can also see I have an in line pressure tank (also new, but before the new PVR fitted) in the flow that seems to be set at 50psi / 3bar. Some photos attached. Is the pressure in the pressure tank set too high? I am tempted to reduce the pressure in the pressure tank to see if that helps (not sure how to do that though).There is a closed valve also in the flow, which if I close stops all noise, but then have no water.
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02D73454-C6B7-4DE5-AE84-D1068C6C2003.jpeg
FC3F8788-A4AB-43DD-9779-18724B7A5DFF.jpeg
595433D7-982D-4026-8ED2-B9FCF293D464.jpeg
6A21A537-AD2B-4A66-A3C4-F3582C1EB219.jpeg
 

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