1/2 HP Pond Aeration System1/2 HP compressor, 5.1 cfm, 3.8 amps, aerates up to 50' deep Includes compressor, valve assembly with pressure relief valve, 300' of 3/8" poly tubing, three SCEPMD2 double air diffusers, fittins and clamps. Horsepower: 1/2 HP Voltage: 115/230v Amps: 4.0/2.0 amps (at 10' operating depth) Maximum Depth: 5.1 Minimum Operating Depth: 50'