Posted by jtown on June 12, 2001 at 06:41:42:
In Reply to: Summer shut down clogged system posted by Dan Sager on June 12, 2001 at 04:17:05:
I assume that you mean a main vent in the basement. Water should not ever get that high. Is your gauge glass flooded? If there is no drain at the low point of the returns near the boiler, you could add one or use the bottom blowdown on the boiler itself.