1 GPM Watermaker Cat Pump 3.8 LPM 1200 PSI 1725 RPM Direct Drive 316 Stainless Steel

Cat Pumps 316 Stainless Steel Direct-Drive Watermaker Pump (1.0 GPM, 1200 PSI)

Engineered specifically for demanding marine applications, this highly efficient, direct-drive triplex plunger pump is a premier choice for onboard seawater reverse osmosis (SWRO) systems. Designed as a reliable, continuous-duty watermaker pump for sailboats, luxury yachts, and long-range cruisers, it features a wetted end constructed entirely of premium 316 Stainless Steel. This high-grade metallurgy ensures maximum structural integrity, exceptional chemical compatibility, and long-lasting durability, providing the essential corrosion resistance required when continuously pumping harsh, high-salinity seawater for offshore desalination.

To help vessel owners seamlessly match this pump to their existing low-volume watermaker systems, it utilizes a precision-engineered 5/8-inch hollow shaft configuration specifically designed to bolt directly to a standard NEMA 56C-face electric motor. By eliminating the need for external belts, pulleys, and mounting plates, this compact direct-drive assembly delivers highly consistent operation in tight, space-limited engine rooms. Operating at a standard 1725 RPM, it delivers a precise flow rate of 1.0 gallon per minute (GPM) at a robust test pressure of 1200 PSI. It incorporates advanced, concentric solid ceramic plungers that provide a true, low-friction wear surface, substantially extending the operational life of the standard NBR (Buna-N) seals to ensure mission-critical reliability while at sea.