- New
Rule 25SA Fully Submersible Bilge Pump, 500 Gallon Per Hour, 12 Volt DC, Automatic Electronic Sensing. Bilge Pump turns on and checks for water approximately every 2-1/2 minutes. If resistance (water) is found, it will run for as long as water is present. When all the water is pumped out, the pump shuts off and returns to its 2-1/2 minute test cycle.