Water Heater knocks and pings
Posted by Socal Resident on January 26, 2004 at 14:32:42:
My hot water heater has developed some strange knocks a pings whenever I run hot water in my house. We have really bad hard water in my area (the worst I've ever seen) and the unit is probably less than 20 years old. The problem developed when I returned from vacation so the water had not been run for about three weeks. Can anyone offer any insight? Is this something serious?

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