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。
Just open a hot water valve in a sink or shower and let the system drain.
这样，只要我们在任何时候打开房间内浴缸或的淋浴喷头的热水出水阀，热水器的水箱就能在地球引力的作用下自动添水。
Then, whenever you open a hot water valve in your house, such as a sink or shower, then it will gravity feed.
热水器的水放完后，关闭连接热水器的供水阀及浴缸或淋浴喷头的热水出水阀。
When it is all drained, shut the "batch connect" valve and shut the hot water valve in the shower or sink.
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