RULE BILGE PUMP 1100 GPH "RULE-A-MATIC" WITH BUILT-IN FLOAT SWITCH 12 VOLT, 1-1/8"outlet, 24 volt. 1100 gallons per hour. Pump and non-mercury switch in a single, compact unit. As water level rises, so does the switch, activating the pump when water reaches 2-1/8". No on/off cycling that drains batteries. Power is used only when pump is running. Uses 1-1/8" hose.