Question about Plumbing
Sounds like the expansion tank does not have enough air for exp in system ,shut off the boiler let cool for 2 hours , drain at least 1 gal of water out of expansion tank ,careful don't get burned ,then open cold water inlet valve , let system take all it will ,should be able to hear quit hissing when filled , let warm again and bleed the rad as close to the end of line as possible , bleed until you sure no more air , if this does not fix repeat process . should take care of problem, only cause 2 little air ,too much air ,circulator pump
Posted on Dec 09, 2008
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Posted on Jan 02, 2017
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