1. In order to be safe, we need to unplug the switch of the water heater, close the water valve connected to the water heater, and then use a tool to open the cover of the drain outlet. When we unscrew it, a lot of water will flow out of the water heater. At this time, we should pay attention to whether the hot water is as far away as possible. When the water inside is discharged, some dirt will come out. 2. Then change the connection ports of the two water inlets. After opening the water valve, the water in the cold water pipe directly enters the water heater, which will
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