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hello oilman i've tried 8 plumbers from the yellow pages and the ones that came backy all said they don't touch unvented systems any ideas on how to find somebody that does? regards paul

hello my father in law calls me, he has a leak. from what i can see he has on oldish unvented system(80's), it has a blue steel expansion reservoir on top of the cylinder. the leak only makes itself apparent when the sytem turns on in the morning, i am presuming that the air pocket in the...