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Mend Valiant combiboiler

pressure?

my valiant combiboiler seemed to lose some pressure over a peroid of a month or so. when i top it to between 1.5 to 2.o bar, it will go down to about 1.o which i then top it up. I have search the system i cannot find any visible leak.

David CHU
May 2007
ValiantValiant combiboilerHeating, Home Heating Systems
is your prv leaking, the copper overflow pipe that gos out through the wall to outside.

hi-spec plumbing
May 2007

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Valiant Combi Boiler Losing Pressure - Help