Automatic Submersible Bilge Pump - Ultima Switch. 02274-001. Heavy-Duty, high-performance pump. Exceeds the tough demands of commercial and recreational duty. Liquid Cooled. 16-Pole motor with double ball bearings. Lip Seal design construction. Prewired with automatic float switch(with Manual Over-ride Operation). Optional and removable check valve included. 1-1/8" & 1-1/4" hose adapters included. 3 year warranty