The EcoPlus?? Bottom Draw Pumps are driven by a high powered magnetic rotor and oil-free motor which works great for small hydroponic systems, aquariums and fountains. The bottom draw feature allows you to lower your reservoir tank to a minimum by drawing the water from the bottom instead of the side. The pumps have a built-in flow regulator allowing full adjustability of your water movement. One moving part allows for trouble-free quiet operation. Comes with 3 additional fittings.