Check the listing for details. NEW EasyPro 1/2HP Rocking Piston Lake & Pond Aeration System w/ 4 Diffusers!!. Condition: New. Listed at 1788.99 USD. EasyPro Sentinel Rocking Piston Deluxe Aeration SystemsFree Shipping inside Continental U.S.A. only The Sentinel line of aeration systems was developed specifically for the professional aeration installer. 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 Diffusers and Cabinet1/2 HP Pond Aeration Kit with Larger SC22 Cabinet:Part# PA65AD1/2 HP Air CompressorDeluxe Pond Aeration Kit Includes: SC22 deluxe locking cabinet with SRC Stratus Gen 2 Compressor, cooling fan, electrical box, valved outlet assembly, pressure relief valve and pressure gauge installed.24 Hour Approx. Operating Cost: $.89# of Diffusers: (2) Quick Sinking QS2 Air Diffusers IncludedTHIS DOES NOT COME WITH TUBING FROM THE COMPRESSOR TO THE DIFFUSERS____-----**** Quick Sink Tubing not Included - Must Purchase Separately ( we sell in out store or you can utilize your own PVC or non sink tube as well!!