Rule 500 GPH AUTO PUMP 12V

Sensing bilge pumps works  on the principle of impeller resistance. The pump will turn on every 2-1/2 minutes for about one second to sense for water. If water is present, the pump will sense resistance and continue to run until all water is removed. After that, it will resume checking for water every 2-1/2 minutes. Water is kept in check between 1/8” and 3/8”. Great idea when power conservation is needed and as an added benefit, no float switch is needed! • Completely automatic with manual override –

• No Float Switch Needed!
• High efficiency, low amp motor 
• Stainless-steel shaft
• Check valve included with hidden air vent to prevent airlocking.
• True electromagnetic suppression (EMC)
•  A built-in thermal cell that protects the pump and the vessel when things get too hot.
• Hose size 3/4"
• 500 gph
• Volts 12
• RUL 25SA