Rule 20SA 800 Automatic Submersible Bilge Pump (12V / 50 LPM / 19mm)The Rule 20SA 800 series automatic submersible bilge pump with 750mm cable eliminates the need for a separate float switch to activate the pump. Once power is supplied to the bilge pump, starting and stopping is completely automatic. The Rule automatic bilge pump turns on and checks for water every 2 1 2 minutes, during this check the pump runs for approximately 1 2 a second and checks for resistance or drag against the impeller. If resistance is