Rule 800Automatic Round 12vRule Automatic bilge pumps eliminate the need for a separate float switch to activate the pump. Once power is supplied starting and stopping is completely automatic. The pump checks for water every 2 + minutes by turning on for a second and measuring load against the impeller. If water is present the pump remains on until the water is removed. Thereafter the pump resumes its 2-1/2 minute check cycle. The automatic pumps feature two positive leads: an automatic (brown) and a manual override (brown with a white stripe). Product : RULE 800 GPH ROUND AUTOMATIC BILGE PUMP 12V Manufacturer : RULE Manufacturer Part No : 20RS UPC : 042237085771