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Posted by HeatPro on September 16, 2004 at 07:43:11:
In Reply to: worcester combi boiler making noises... posted by andy on September 16, 2004 at 02:51:38:
Check for a restriction or valve closed partly in the incoming water line. When you open the tap the pressure in the water line will drop at the house side. When you close the valve the pressure will build up and can make a reed-like noise as the pressure equalizes past the diverter valve. A change in the pressure reducing valve at the incoming water line could also help produce this pressure change noise.
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