Electric Bilge Pumps (3700gph 12v) Boat Marine Plumbing Can be widely used in water sampling, high-volume liquid transfer, low-noise continuous workplace; Large aquarium, small swimming pool, water reservoirs, fountains and many other occasions. Fresh water, sea water analysis, wastewater treatment, water sampling, water purification, bilge water emissions from ships, breeding ornamental, water cycle transfer, agricultural spraying, irrigation, floors, carpet cleaning, etc.