Jabsco Run Dry Macerator Waste PumpThe Jabsco 18590 Series Macerator Waste Pump is the ideal solution for emptying marine holding tanks when not in a discharge restricted area. Self priming to 5 feet, this pump will empty atypical 30 gallon holding tank in less than 3 minutes. Duty cycle of the pump is 15 minutes continuous which means a 180 gallon can be emptied in a single operation. The Jabsco Macerator Pump is also an ideal pump for the emptying of fish box and livewell receptacles. This waste tank-emptying macerator pump grinds solids into small particles that easily pass through the 1" discharge port. The Jabsco Macerator is equipped with a protection device that eliminates accidental run dry.Features: Impeller: Jabsco Nitrile compound; Macerator: Stainless steel cutter reduces particle size to 1/8" maximum. 4 Blade design; Seal: Lip Type; Inlet Port: 1-1/2" Hose Barb & 1-1/2" NPT (Male); Outlet Port: 1" Hose Barb; Priming: 5' When Wet, 4' When Dry; Complies with USCG regulation 183.410 and ISO 8846 MARINE for Ignition Protection;