Rule Super Switch Bilge Pump Float Switch 37A The Rule Super Switch Float Switch is a non-mercury bilge pump float switch designed for the toughest applications and used with bilge pumps drawing up to 20 Amps. Rule Float Switches are for automatic onoff bilge pump control. This switch will activate the pump when the water level reaches 2 and will turn the pump off when the water level falls to 34. Includes highly abrasion resistant, marine-grade 14 gauge blocked wire. The Super Switch features a