The Attwood Automatic Float Switch with Guard converts any bilge pump that draws 12 amps (at 12 VDC) or 6 amps (at 24 VDC) or less to fully automatic operation. The compact, low-profile design mounts on any surface from horizontal up to a 24° angle. No large voltage drop which reduces bilge pump output like some reed switch designs. It incorporates a reliable and affordable mechanical switch that actuates pump motor at 2 inches water level.