Rule Float Switch Super Switch. Replace your current float switch or install a new one to get automatic watering from a sprinkler head or drip irrigation system. With a Rule Float Switch you get all the benefits of a mercury switch with no global warming-just a better more efficient system. The Rule SuperSwitch Float Sensor is amazingly reliable usually outlasting its competition by a factor of ten making it the switch of choice for active green systems. These water activated pumps use significantly less energy than other switches allowing Rule to save energy. The float also aids in the elimination of dead spots and rough edges. Give your existing pumps a new lease on life by replacing their worn out parts with the Rule SuperSwitch Float and Repair Kit. Specifications for Rule SuperSwitch Float Switch: Manufacturer: Rule Color: Black Voltage: 36 volts 24 volts 12 volts Features of Rule SuperSwitch Float Switch Volts: 12 24 36v Package Contents: Rule SuperSwitch Float Switch Rule 37FA: Float Switch Super Switch