EasyPro PA66W Rocking Piston Pond Aeration System 1/2 HP Kit with Quick Sink Tubing COMPLETE AERATOR UNIT: The EasyPro PA66W Rocking Piston Pond Aeration System 1/2 HP Kit with Quick Sink Tubing includes all the necessary components. It features a 1.2 horsepower compressor, brass valve assembly with pressure relief valve and 300 feet of 3/8 inch weighted quick sink tubing. It also includes three EPMD2 double air diffusers, fittings and clamps. 50 FOOT MAXIMUM OPERATING DEPTH: This system aerates when it is at a water depth of 50 feet or fewer. Its coverage area is based on diffusers in 12 to 16 feet of water. The actual coverage area varies according to the diffusers' operating depth. POWERFUL COMPRESSOR: The included 1/2 horsepower compressor operates at 115 volts, with a 230 volt 1/2 horsepower compressor available upon request. The 115 volt compressor uses 3.6 amps of electric current at a 10 foot operating depth. The 230 volt version uses 1.8 amps at the same operating depth. The compressor's maximum air flow is 4.5 cfm. HELPS FISH AND PLANTS THRIVE: This aeration system adds oxygen to your pond's water. To be healthy and happy, koi, other fish and aquatic plants need oxygen in their environments. WARRANTIES INCLUDED: The compressor has a 2 year warranty. The tubing and diffusers have 5 year warranties.