The ASOV Kit includes a float valve with integral bulkhead fitting, an Auto Shut Off Valve, Check Valve, and 5 feet of 1/4" tubing. Works great to automate the filling of a reservoir/tank. Turns the RO or RODI system off when the tank is full.  Select which float valve you'd like in the kit above.  The adjustable float valve allows you to make fine adjustments to the water level in the reservoir by pivoting the float up or down.  Float valves are mounted through a hole in the tank wall.  Drill a 7/16" hole for either 1/4" float.