Aerate 24 hours a day and still take advantage of the wind with our Aerator/Windmill combo. It includes our 20' Deluxe Windmill with all the accessories, an AerMaster Electric Aerator, and a control box to fully regulate the system. The windmill offers a self-governing extra large 73 head which helps with turning at low wind speeds and uses a secure locking mechanism to attach to the compressor. This system also uses large check valves and upgraded 1/2 airline designed to handle increased air flow. The compressor can produce up to 4.5 CFM of air at a rated 30 psi which means it can really aerate your pond and can also aerate deeper water if needed. Full 5 year warranty on the compressor bearing's, piston and crankshaft. No one else in the industry offers a 5 year warranty on the compressor and that is the most critical part of a windmill! System includes the windmill, 100' of 1/2" polytubing and one airstone diffuser with backflow valve, AerMaster Electric Aerator and control box.