Sensor Max II 5 GPM Variable Speed Freshwater Pump - 12V, 40 PSIExceptional performance and life for total peace of mind with your onboard water system. The Sensor-Max II is the most sophisticated freshwater delivery pump featuring variable speed technology. The Sensor-Max II incorporates a high-performance five-chamber design with an advanced pressure sensor and variable speed programming that automatically adjusts the motor speed to deliver the right flow and pressure the water system requires. The result is an extremely quiet pump operating smoothly in the background for a truly exceptional onboard experience for total peace of mind while at sea. Features: Quiet operation with no water hammer Consistent pressure and smooth, steady flow Eliminates the need for an accumulator tank High flow capacity, supplies up to five outlets Conserves power by adjusting motor speed as needed Robust co-molded diaphragm and cast aluminum lower housing for long life Quick Guide (pdf)