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Posted by HeatPro on January 10, 2005 at 07:41:48:
In Reply to: Vaillant VCW-sine 18 Vibration noises from Domestic Hot Water posted by Mike on January 10, 2005 at 00:37:20:
The diverter valve can have problems with excessive pressures. Have a pressure reducing valve installed to limit the high incoming domestic pressure.
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