Designed specifically for cruisers and midsize yachts. 4.0 GPM and pressure up to 50 PSI. Micro-controller based variable speed pump precisely monitors system's water pressure and adjusts motor speed, eliminating the need for a pressure switch. Four-chamber design incorporates large inlet and outlet passages to maximize water flow and efficiency. Provides "just like home" shower and quiet operation. Thermally protected. Ignition protected. 3 year manufacturer's warranty. Dimensions: 7.2" x 5.4" x 5.3".