COMMUNITY FORUM

tampat20

07:31PM | 02/07/06
Member Since: 02/07/06
4 lifetime posts
Bvplumbing
i have had to change the t/p valve in water heater 4 times this mo. becuase it keeps leaking,i have turned the temp down to luke warm and it still leaks, i do have hard water with high pressure, changed elements and adjusted pressure can turn it to high and have more than enough pressure and can turn it down to nothing and i still hav leaks... can anyone help???

Billhart

04:19AM | 02/08/06
Member Since: 04/25/05
1916 lifetime posts
"adjusted pressure can turn it to high and have more than enough pressure.."

It is not clear, but I assume that you are talking about a pressure regulator or pressure reduction valve.

If so that is the problem.

Water is non-compressable and it expands when heated. A pressure regulator acts as a one way valve and since the water can't compress the pressure will increase when it is heated until pressure is high enough to force the safety valve open. Usually only a very small amount of water is release to reduce the pressusre.

This problem is also showing up because a lot of cities are adding anti-syphon or check valves at the meter.

The soltuion is to get an expansion tank and install it. An expansion tank has a air chamber where the water can go to when it expands.


Sylvan

07:07AM | 02/08/06
Member Since: 01/24/06
1512 lifetime posts
Me_office1
4 times should have given you a clue the T&P is doing its job relieving pressure.

Have you considered an expansion tank to allow for the increased pressure?

Normally an ASME T&P is rated at 210 deg and or 150 PSI as water is heated it expands thus the pressure builds up.

Replacing a valve 4 times will not cure the problem.

You either lower the incoming pressure to a safe level or install an expansion tank
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