Complete aeration system for ponds up to two acres depending on shape and depth of pond. 1/4 hp Rotary Vane RV33 compressor, 4.5 cfm, 2.3 amps, aerates up to 18? deep. The PA50W kit also includes two QS2 Quick Sink air diffusers, dual valved outlet assembly with pressure relief valve, 200? of 1/2? Quick Sink tubing, fittings and clamps.