Overhead Shower Water Volume Control Valve, Not Shut Off

  Brass built 1/2" FIP inlet X 1/2" MIP outlet Ball-cartridge controlled, 1/4-turn operation Mounted on shower arms, By PlumbUSA Cannot be used as a positive shut off valve (by law) For safety reason it won't shut off water completely.   Excellent water-saving device for your bathroom. Simply attach the valve between the shower arm and head and turn the nozzle to reduce or increase the water flow. This is a Water Volume Control Valve "NOT a Shut off valve" (It won't 100% shut water off for good reasons, such as not to burst showerarm off if forget to turn it back on.)