Jabsco-Rule 500 GPH Auto 12V Bilge Pump 25SAThe Rule 500 GPH Automatic Bilge Pump provides the ultimate pumping performance, which helps keep your bilge clear of nuisance water. Rule pumps are tested to the highest standards to deliver the best performance at an economical price. Float switches are not required for these fully automatic pumps. Controlled via built in sensors, the pump will turn on every 2.5 minutes for about 1 second to sense for water. If water is present, the pump will sense resistance and continue to run until all water is removed. Hidden air vents in the body help with the check valve and prevents locking during plumbing installations. This model features a snap-lock strainer base, which makes it easy to clean, and a thermal cut-off for added protection.Features: No float switch needed; Checks for water every 2-1/2 minutes; Runs for half a second; Consumes 0.25 amps per day; Submersible; Ignition protection; High efficiency, low amp motor; Non burn-out when dry; Stainless steel shaft; Back flow prevention; Easy-clean; Marine-grade blocked wiring; Thermal cut-off; Threaded discharge; Specifications: Flow Rate: 500 Gallons Per Hour (GPH); Voltage : 12 VDC; Fuze Size: 2.5 Amp; Amp Draw: 1.9; Height: 4"; Width: 2-3/8" ; Port Type: 3/4" Hose Barb;