This line of adjustable water pumps offer an energy efficient magnetic ferrite rotor with a ceramic shaft, vastly improving GPH and head pressure that is needed in hydroponic systems, fountains and more. These pumps are manufactured with a built-in flow regulator allowing full adjustability of your water movement. Included with each pump are three sizes of fittings that easily attach to the outside threaded distribution outlet. 172 GPH thru 370 GPH Models include a 6 ft 120 volt power cord. 528 GPH thru 1269 GPH models include a 15 ft 120 volt power cord.