Complete Sentinel Deluxe 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. PA50D kit includes compressor, two valve outlet assembly, pressure gauge and pressure relief valve all mounted in SC22 lockable steel cabinet with cooling fan and electrical outlet installed. Now also with 6? power cord pre-wired to plug cabinet system into GFCI protected outlet. Kit also includes two QS2 Quick Sink air diffusers, 200? of 1/2? Quick Sink tubing and fittings for connections.