3.5 GPM Quiet Watermaker Cat Pump 13.2 LPM 1200 PSI 1725 RPM Direct Drive 316 Stainless Steel

Cat Pumps 316 Stainless Steel Direct-Drive Watermaker Pump (3.5 GPM, 1200 PSI)

Engineered specifically for demanding marine applications, this industrial-duty, direct-drive triplex plunger pump is a premier choice for onboard seawater reverse osmosis (SWRO) systems. Designed as a highly reliable 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 watermaker system, 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 consistent, continuous-duty operation in tight engine rooms. Operating at a standard 1725 RPM, it delivers a precise flow rate of 3.5 gallons per minute (GPM) at a robust test pressure of 1200 PSI. As part of a specialized "Quiet" series, its internal design significantly reduces operational noise levels. Combined with concentric solid ceramic plungers that provide a true, low-friction wear surface, this pump maximizes the operational life of the standard NBR (Buna-N) seals while maintaining a quieter, more comfortable onboard environment.