Reversible pump can quickly fill or drain a ballast tank with either fresh or sea water. Designed for continuous duty usage and has a built-in thermal overload. Ports: External 1-1/2" NPTF. Built in Thermal Overload Protection with automatic reset upon coolingIdeal for system with tank monitoring for overfill and protection against dry-run while emptyingRetrofit ready for existing wake and watersport boats with approved electrical and plumbing specificationsImproved impeller compounds designed for short duration *dry-run events to keep you on the water longerHigh Performance and High Output for intermittent duty cyclesProfessional installation recommended (Acc. to ISO 10133)NOT TO BE USED IN POTABLE WATER SYSTEMS.