Recent content by enizzle19

Pitching is when the vent pipe has water passing through into the f&e tank or pumping over, the ballcock has been replaced so should not empty again, my question is would an airlock cause the pitching? Would that be enough of a restriction?

Hi guys, my grandfather's heating system has been working away no problem for 30 years, a few weeks ago the ballcock in the feed and expansion tank stuck and the system began to run dry he noticed that the upstairs rads were not heating as they were empty obviously, he freed up the ballcock and...