These submersible water pumps are great for everything from fountains to hydroponic systems. The pumps have an inside threaded fittings and the flow is non-adjustable. Powerful oil-free, rare earth rotor magnet. Ceramic shaft and bearing insures reliability. Trouble-free – one moving part. Strainer protects impeller from damage. Comes with a 120-volt cord. Includes inlet and outlet fittings.