Reply To: Relief Valve

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fourth year

As long as you are still trying to learn the trade there is hope for you yet. My water heater, and everyone I have seen for the last 40 years, says “Test pressure 300#, MAXIMUM working pressure 150#”, so, if you are so bent on obeying the rules, why would you recommend a 175# T&P valve? They may be using the 100XL for something other than a water heater, but the probablity is that it is to stop a 150# valve from dripping.

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