Complete Sentinel Deluxe Aeration System for ponds up to four acres depending on the shape and depth of the pond. 3/4 hp Rotary Vane RV75 compressor, 10 cfm, 12 amps, aerates up to 18′ deep. PA75D 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. Now also with 6′ power cord pre-wired to plug cabinet system into GFCI protected outlet. The kit also includes four QS2 Quick Sink air diffusers, 600′ of 1/2″ Quick Sink tubing and fittings for connections.