Sensor Max 14. The Sensor Max 14 with 3.7 GPM is a pressure sensor controlled multi-outlet water pressure pump, with variable speed drive, serves 1-5 outlets. Motor speed is electronically controlled to maintain steady flow and constant pressure. Sensor Max VSD accepts from 10 to 29 Volt DC for use with 12 or 24 Volt DC power. Up to 3.7 gpm. Self-priming up to 10 ft. Eliminates accumulator tank. Runs silently under normal use. Automatically adjusts to 12 Volt DC or 24 Volt DC power. Conserves battery power by using lower amps at lower flow. Thermal overload protection automatically stops motor should it overheat due to overload, with auto re-start feature. Connections for 1/2ö ID hose or 1/2ö Qest threads.