Expansion tanks, pressure relief valves
Posted by Alex Cowell on December 03, 2003 at 13:06:16:
Hi there

I am just about to replace my pressure relief valve on the hot water tank. Over thanksgiving the thing started dripping (just like the PRV before it) and continued to drip once I tested it (a two second release of the valve).

Because I replaced this thing a year and a half ago I wonder if there are other checks on the tank that I need to make. I know the town typically has very high mains pressure.

I notice some talk about expansion tanks that may be necessary if I have a 'closed system'. How do I know if I have a closed system? Also, can you recommend other checks of the hot water heater that I need to make?


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