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home Fix label Heating label_important Home Heating Systems category Swift Flow

boiler looses pressure when heating not on ,but no leaks?

the swift flow 80 looses pressure when heating not on so no hot water till heating called for ,but presser rising all time when heating on.
denis osullivan, November 2005
home Fix label Heating label_important Home Heating Systems category Swift Flowdone
This is more likely to be a perforated diaphram on the expansion vessel.If the pressure goes up rapidly when the heating is on that is the most likly cause.

Sig Lofnes, November 2006
Had a friend with this kind of problem, and it turned out to be the expansion vessel had no pressure in it. Get yourself a car tyre pump and put in some air, maybe 6 pumps, and see how you go. The expansion vessel should have a car tyre type valve in it.

Dode, December 2005
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