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Yes, at that time You may need to replace the pop off valve. This valve is designed to relieve the pressure on the water heater if something should go haywire in the heating controls,before it explodes. They wear out like anything else. They cost less than 20 bucks.You may have to sweat the relief valve pipe loose and unscrew the old one from the tank. The unit will need to be shut down. The water supply will also need to be turned off.

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