Just open a hot water valve in a sink or shower and let the system drain.
我们只要打开浴缸或淋浴喷头的热水出水阀，把热水器的水放掉就行了。
To avoid water damage or scalding due to valve operation, a drain pipe must be connected to the Pressure Safety Relief Valve and run to a safe place of disposal.
为了防止这种安全阀发挥作用造成水破坏或烫伤，必须在安全阀上安装排泄管道，将排放出的水引导到安全的排放地点。
Drain out 5 gallons of water from the drain valve at the bottom of the heater.
从热水器底部的排污阀排出大约5加仑的水。
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