如果水箱没有充满正常水量(水箱内侧应该有一条水位线)，慢慢地弯曲一下浮囊阀，看水位会不会上升。

If the tank is not filling all the way (there should be a fill line on the inside of the tank), carefully bend the bulb of the float valve up a bit and see if the tank will fill.

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水囊(3)通过水囊管(4)在尾部连有一个单向阀(5)。

The water bag (3) is linked with a one-way valve (5) at the tail by a water bag pipe (4).

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