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Posted by Ron K. on December 11, 2004 at 12:02:11:
I installed a new gas Peerless boiler for my hot water heat system. The system is a single loop with 7 cast iron radiators. Water pressure on a cold start is 12-13 PSI. When the water temp reaches around 150-160 degrees the pressure is 15-16 PSI. Everything works well and is quiet. I have two expansion tanks on the system. Is this PSI ok or should it be higher ?