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Mend Worcester 42i Loss Water Pressure

Loss of water pressure?

I have a Worcester 42i combi boiler. Over night when the heating is off the water pressure drops by 1/2 a bar, probably more if I left it longer. There is no evedence of a leak that I can see. Any advice?

Joe H.
February 2010
WorcesterWorcester 42iHeating, Home Heating SystemsLoss Water Pressure

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