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Rule automatic bilge pumps have an internal computer chip to cycle pumps every 2-1/2 minutes. The pump runs for one second and shuts down if no water is detected. If water is detected, automatic pumps sense resistance at the impeller and run until water is removed. No float switches required.
500 (Rule 25SA), 1100 (27SA), 1500 (51S), and 2000 (53S) GPH pumps handle the spray and rainwater that can quickly fill a small or open boat. 12 volt DC. Minimal power use or current draw in sensing mode. All pumps are completely submersible, rust and corrosion free, and ignition protected. Built in strainer base snaps off for easy cleaning.