Rule 500GPH Electronic Sensing Bilge Pump - 12V [25SA] Bags Fishing Gear Cutout Ø - 4 13/16

Cutout Ø - 4 13/16 in

Magnetic fields generating interference on the compass performance exist on all boats

Volume -  1

For boats with narrow or uneven gunnels

Black or white plastic cover

Rule 500GPH Electronic Sensing Bilge Pump - 12V [25SA] Bags Fishing Gear Cutout Ø - 4 13/16500GPH Electronic Sensing Bilge Pump 12V In the next generation sensing bilge pumps, the 500GPH S series pump 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"!!!