Whale manual pumps are the simple option for installing a water system on your boat. Pumps fresh and saltwater, self-priming and operates dry without damage. Smooth double action, 16L/4.3 US Gal per minute. Multi-directional inlet and outlet nozzles. 3 mounting options, including thru bulkhead. Left and right hand versions available. Easy, smooth, hands-free operation. Can be used to prime Whale In-Line Booster pumps. Hose connection:1/2 inch Construction: acetal copolymer, nylon, neoprene and nitrile rubber and stainless steel. Service Kit: AK0553 Max Priming Height; 2m/7 feet Max Output/min: 16.4L