purging forced hot water syatem

Old 11-07-05, 11:04 AM
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Angry purging forced hot water syatem

I have 3 zones forced hot water system with 3 circulating pumps controlled by three thermostats. One zone ( upstair) has a water fall type of noise when the heat comes on. I asume this is because of air in the pipes. I have no vent valves in the baseboards. How do I drain the air?
Old 11-07-05, 05:28 PM
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Purging air

This subject has been covered numerous times in this forum. Please do a search of the forum. If you still have questions please post a link to some pictures of the piping near the boiler & we will try to help.

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