Sentinel Deluxe Aeration System for ponds up to four acres depending on shape and depth of pond. 3/4 hp Rocking Piston SRC75 compressor, 6.5 cfm, 4.5 amps, aerates up to 50′ deep. PA86D kit includes compressor, four valve outlet assembly, pressure gauge and pressure relief valve all mounted in SC22 lockable steel cabinet with cooling fan and electrical outlet installed. Kit includes four QS2 Quick Sink air diffusers and fittings for connections. Kit does not include tubing, making it an ideal solution where custom tubing lengths can be purchased as needed. Connections are set up for 3/8″ ID tubing.