Symmons ShowerOff  4-420 metering shower valves and systems provide a positive solution to the issues of water waste and hot water energy savings. A durable, piston-actuated metering shower valve, SHOWEROFF provides a full shower flow for approximately 45 seconds, and never forgets to shut itself off. The cycle can be repeated indefinitely, but the shower can not be left running. Ideal for public showers, detention facilities or any shower application where there is a need to positively control shower water usage. As a single supply metering valve, SHOWEROFF can be supplied with a single cold or tempered water supply line.