The reason why the valve does not work after installation
(1) The valve is not installed correctly.
(2) the inner core of the valve has been damaged.
First, when installing the cut-off valve, we should pay attention to the direction of the inlet of the valve can not be installed backwards, to achieve correct installation. In general, the valve body is marked with a flow arrow, which indicates the direction of water flow. Second, before installing the valve, the quality of the valve should be carefully checked, and if necessary, the flexible test of water, pressure test and opening should be carried out.