Check the listing for details. NEW EasyPro 1/2 HP Rocking Piston Lake & Fish Pond Aeration System w/o Diffusers. Condition: New. Listed at 1649.99 USD. EasyPro Sentinel Rocking Piston Deluxe Aeration SystemsFree Shipping inside Continental U.S.A. only The Sentinel line of aeration systems was developed to provide a dependable solution to aerating lakes and ponds. Each of these systems are complete, easy to install packages with all the available options included. We know how valuable your time is on the job site so we have done as much of the work as possible in our warehouse to minimize your time on-site. EasyPro Rocking Piston Deluxe Aeration Systems will...Improve water quality and clarity - improved oxygen levels increase bacterial actionEliminate thermal stratification - mixing action creates more uniform water temperaturesPromote healthier fish - protects against winter kill in freezing climatesEach package includes EasyPro's deluxe locking cabinet complete with air compressor already installed, a cooling fan already installed and a electrical box/outlet already mounted and ready for your incoming power lineEvery compressor has a valved outlet assembly, a pressure relief valve and a pressure gauge installed, simply set cabinet in desired location, install the air diffusers and connect the tubing!50' maximum operating depthDual voltage motors ship 115v unless specified 230v2 Year Warranty on Compressor, 5 Year Warranty on Tubing and Cabinet1/2 HP Pond Aeration Kit with Larger SC22 Cabinet - Includes 200' of Quick Sink Tubing:Part# PA65DLD1/2 HP Air CompressorDeluxe Pond Aeration Kit Includes: SC22 deluxe locking cabinet with Stratus SRC Gen 2 Compressor, cooling fan, electrical box, valved outlet assembly, pressure relief valve and pressure gauge installed.24 Hour Approx. Operating Cost: $.89We sell Tons of diffusers in our store to fit any budget - or utilize your own with this kit!