Rule 1100 GPH Automatic Bilge Pump 27SA The Rule 1100 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. The pump is completely submersible and has a tough plastic body. It features back flow prevention to reduce the amount of water left over in the bilge. This reduces odor and helps keep the bilge cleaner. 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. The threaded discharge provides easier installation and easier maintenance. Features: Rust and corrosion protected; Silent operation; Completely submersible; Ignition protected; Long-life motor; Non burn-out when dry; Stainless steel shaft; Back flow prevention; Easy-clean; Marine-grade blocked wiring; Thermal cut-off; Threaded discharge; Marine-grade blocked wiring; No float switch required; 3 year warranty; Specifications: Height: 4.7"; Width: 2.9"; Depth: 2.5"; Volts: 12 DC; Amp draw @ 12 V: 3.7 amp; Amp draw @ 13.6 V: 4.7 amp; Fuse size: 7.5 amp; Port size: 1" hose barb, 1-1/8" hose barb; Replacement strainer: 1232R; Panel switches: 41, 43, 45; Click here for Rule 27SA Automatic Bilge Pump Installation Instructions