How To Install A Water Heater: A Complete Step-By-Step Guide

The temperature and pressure relief valve is a safety device that limits tank pressure and keeps it from exploding . For the valve to work properly, the discharge pipe must be kept free of obstructions (Fig. A). Unscrew the vent pipe from the vent hood and move it to the side. Then cut the hot and cold water lines with a tube cutter. (Unscrew unions for galvanized pipe or the nuts on flexible connectors if you have them.) Slide the old water heater out of the way.

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