After draining, close drain valve.

排泄完毕，关闭排泄阀。

Shut off supply pressure and drain valve.

关闭供应压力和排泄阀门。

Screw type drain valve, convenient opening.

旋紧式泄水阀，开启方便。

Why didn't you fit a drain valve on this tank?

这个箱柜居然没有安装泄放阀。

Leave the drain valve of the holding tank opened.

让贮槽的排水阀打开。