I went to a customer the other dayto replace the guts in her leaky toilets and replace a leaky faucet in the utility sink. The next morning she called me and told me that she had a leak in her utility closet and she thought it was the water heater. I determined that the water was coming from the pressure relief valve. I saw the check valve on the water main and figured that her expansion tank must be shot. To my surprise there is no expansion tank. So I guess her leaky toilets and sink kept the pressure released, so when I fixed her leaks the pressure built up and started coming out of the tank. My question is was there a period of time when check valves became code and there was no code for expansion tanks? I work in the Mount Laurel New Jersey area and I have never seen a house with a check valve and without and expansion tank. There are hundreds of units built the same way in this development. They must all have leaky toilets!
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Water main check valve, no expantion tankPage Title Module
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