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Over pumping into header tank

Postby andrew fitzpatrick » Wed Jul 30, 2008 11:41 am

Can anyone help? Whenever my boiler is on I am getting hot water constantly running out of the vent pipe into the expansion tank for the central heating system.

Can I block the pipe without risk of blowing the system? If not can anyone suggest a method of stopping this happening?

The expansion tank is only mounted 1.5m above the pump nad motorized valves.
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Simply Build It

Postby htg engineer » Sun Aug 03, 2008 1:00 pm

DO NOT: blank or fit any valves to the vent pipe. ... hp?t=12601
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