I flushed the pills down the lavatory.

我把药片丢进抽水冲。

Install a flush toilet with small pondage.

一个贮水量小抽水。

The lavatory won't flush.

抽水灵。

94. unstop a sink, toilet, drain, etc

疏通洗涤槽、抽水、下水道等.

The worst thing is that the water closet is clogged and when I flushed it, it overflew.

最糟糕是抽水堵住了，我一冲水，水就冒出来。