Corrosion in forced hot water heating
Posted by M Kirby on July 28, 2003 at 12:28:44:
In the last couple of months, 4 air & drain valves had to be replaced in a boiler-driven residential hot water heating system because of corrosion. Could the QEST-PEX tubing used when an addition was built on the house be causing the problem? There is anti-freeze in the system as well.

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