Atwood Automatic Float Switch. The Automatic Float Switch converts any bilge pump that draws 12 Amp (at 12 Volt DC) or 6 Amp (at 24-V DC) or less to fully automatic operation. It features a compact, low-profile design that mounts on any surface from horizontal up to a 24 inch angle. No large voltage drop which reduces bilge pump output like some reed switch designs. Incorporates a reliable and affordable mechanical switch that actuates pump motor at 2 inch water level. Wire leads do not flex or hinge with the float. Integral cover dampens bilge sloshing to reduce pump cycling, and prevents debris interference. Sealed switch mechanism resists moisture, fume ignition and electrical shock. Contains no mercury. Features a convenient test knob to test pump operation. Without Cover.