I recently had my heating pipes purged and from there disaster. All floor pipes begain making loud noises they never made before. The guy also increased the psi from around 10 to 25. I have now lowered the psi to around 14. Am I to understand the psi of the line pressure needs to match the psi in the bladder tank? If so why? Also I closed a valve on the celling which should prevent new water from coming into the system, but when I bleed water from the radiators to try to get out air and tl lower the psi, I get the psi down to around 14 but it creeps up slowly by about 4 lbs in 2 days. Could the valve that shuts off water supply have failed? It is a small gate valve. It seems shut good. Help.
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