Rule-A-Matic Plus Bilge Pump Float Switch

Rule-A-Matic Plus Bilge Pump Float Switch

A bilge pump is only as reliable as the switch controlling it. The Rule-A-Matic Plus Float Switch (Model 40A) is built to give boaters confidence that their bilge system will activate when it matters most, with an enclosed, impact-resistant design that keeps debris away from the float mechanism and delivers consistent performance in the wet, gritty conditions bilges are known for. Compatible with non-automatic submersible bilge pumps drawing up to 20 amps, it works across 12V, 24V, and 32V DC systems, making it a versatile fit for both recreational and commercial vessels.

Installation and ongoing maintenance are straightforward. The 14-gauge abrasion-resistant marine-grade blocked wire comes with a 28-inch lead, and the external manual testing lever lets you lift the float by hand to verify operation without pulling the switch or disturbing your bilge setup. An integrated strainer adds another layer of protection against debris that could otherwise interfere with float movement. Mercury-free construction meets current environmental and safety standards, and a two-year limited warranty backs the build.

Key Features

• Impact-resistant, fully integrated cover prevents debris from jamming the float mechanism

• Manual testing lever on the back of the switch allows periodic operation verification without disconnecting

• Integrated debris-resistant strainer protects float movement and reduces maintenance needs

• Compatible with non-automatic submersible bilge pumps drawing up to 20A

• 14-gauge abrasion-resistant marine-grade blocked wire with 28" lead

• Mercury-free construction meets modern safety and environmental standards

• Two-year limited warranty

Specifications

• Dimensions: 2-7/8"H x 2-1/2"W x 5-1/4"L

• Voltage: 12V, 24V, or 32V DC

• Max Amps: 20A

• Wire: 14-gauge marine-grade blocked wire, 28" lead

• Type: Enclosed float switch for non-automatic submersible bilge pumps

• Application: Recreational and commercial boats

• Warranty: 2-year limited