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Expansion tank

Posted by Billhart Moderator on July 23rd, 2007 09:58 PM
In reply to water heater by te2777 on July 23rd, 2007 09:28 PM [Go to top of thread]

"It drips after water is used in the house. "

You need an expansion tank.

Many cities are installing checkvalves or backflow preventers at the water meters.

And water is not compressable. So when heated it expands.

Before the backflow preventers the expanded water would jsut backup into the main.

But now it can so the pressure builts enough to cause the safety valve to release.

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