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Posted by HeatPro on October 20, 2004 at 08:51:18:
In Reply to: Home hotwater heat questions posted by Wesley D. Wuertz on October 20, 2004 at 05:46:03:
Replacing a zone valve with a manual valve is not planning ahead, as changing heat demads with the weather means running up and down to adjust a manual valve.
Read the pages at:
It could be that the previous references didn't include moving pictures.
If you don't have purge valves, install a tee and boiler drain or purge cock at the cold side of the zone valve. The previous installer must have gotne the air out by some means, probably a working air vent at a high point.
Get nack with more questions.
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