Bilge pumps are designed to remove water that reaches the bilge. Non-automatic pumps require a device to control the pump, engaging the pump when water enters the bilge, and then disengaging the pump when water has been removed. Xylem’s Rule brand offers a portfolio of bilge pump float switches that are designed to suit all boat requirements and pumps from 360 GPH, up to 4000 GPH. Year after year, the Rule-A-Matic remains a popular bilge pump switch for boaters. Featuring a removable base for easy cleaning and servicing, a mercury-free snap switch tested to over one million cycles, and marine-grade blocked wire, the Rule-A-Matic is designed for pumps drawing up to 14 amps. The Rule-A-Matic comes with a 2-year warranty. PRODUCT FEATURES Fits multiple pump sizes Removable base for easy cleaning and servicing Interchangeable mounting bases for replacement or upgrade (models 35A & 37A) Marine-grade blocked wire Mercury free snap switch tested to over one million cycles and marine grade "blocked" wire Designed for pumps drawing up to 14 Amps Complete with built in fuse holder 2 year warranty Dimensions: 4 1/2" x 1 1/2" x 2"