Rule SuperSwitch Float Switch Marine Accessory - Now backed by a 5 year warranty, the non-mercury, Rule SuperSwitch Float Switch Marine Accessory is designed for the toughest applications. Design includes marine grade 14 gauge "blocked wire", larger float for increased buoyancy, removable base for easy servicing and a snap switch design capable of handling pumps drawing up to 20 Amps. A standard bilge pump operates by a control switch that senses water and activates the pump. Rule's Float Switches offer outstanding performance. We use extra-large float chambers for increased buoyancy and detachable mounting bases that make them easier to install and remove for cleaning and inspection.