4-Leg Galvanized Windmill Aeration Systems
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$1,499.99 - $1,899.99


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  • Details
  • Tech Specs
  • Parts
  • Reviews
  • Provide Aeration For Remote Ponds
  • Place Up To 1,000 Feet From Pond's Edge
  • Made in the U.S.A.

Windmills are an excellent supplemental solution to electric aeration systems, and they provide a solution for ponds in remote locations. With as little as 3-5 mph, these U.S. manufactured windmills can provide air to a single air stone. For larger or irregular-shaped ponds, it may be upgraded to a two-stone system in high wind areas. If necessary, windmills may be placed several hundred feet from the pond's edge to catch more wind. Windmill Aerators are recommended for ponds up to 1 acre and less than 15 feet deep. The head and tail are the same for all sizes, only the height of the tower changes. The taller the tower, the more wind the windmill can access.

Also available as a 3-leg Galvanized Windmill package. Want a more nostalgic look and feel from your windmill? The 4-leg Wooden Windmill is a masterpiece in design with cedar colored pressure treated wood. This windmill will look great for a long time!

ALL WINDMILLS INCLUDE: 100' poly tubing (non-weighted), air stone, check valve, anchor stakes.

Airmax® EasySet™ Weighted Airline: Designed to lie flat on the bottom of your pond.
Additional Windmill Airstone Kit: Using an additional stone, you can aerate more effectively. Includes an additional air stone, check valve, fittings and ball valves for equalizing airflow. Airline sold separately.
Windmill Freeze Control System: Designed for northern climates, condensation can build up and cause airlines to become frozen. Use with ethanol (rubbing alcohol).
Windmill Tower Hinges: Installing these special hinges will allow you to pivot your windmill up and down, making it easier to install and service.


Please Note: The Pond Guy® does not recommend relying solely on windmill aeration. Wind, as a source of power, is inconsistent in many locations. Generally wind is weakest during the hottest part of the day, when aeration is most important. If an electric power source is within 1,000 feet of the pond's edge, an Airmax® Aeration System will meet and exceed your aeration needs.

Tech Specs

From product dimensions to operation manuals, the TECH SPECS tab contains all of the information you need to choose the right equipment for your pond.

12' Tower
16' Tower
20' Tower
24' Tower
Air Stone Diffuser 1 1 1 1
1/2" Airline 100' 100' 100' 100'
Head Diameter 73" 73" 73" 73"
Aerates Pond Up To 1 Acre Up To 1 Acre Up To 1 Acre Up To 1 Acre
Maximum Pond Depth 15' 15' 15' 15'
CFM @ 2-3MPH 0.5 - 1.0 0.5 - 1.0 0.5 - 1.0 0.5 - 1.0
CFM Rating 3.0 - 4.5 3.0 - 4.5 3.0 - 4.5 3.0 - 4.5

Warranty Information: Windmills are warrantied for 3 years from purchase date against defects in workmanship and 5 years from purchase date against defects in the compressor.

How To Use Aeration

Assembly is required. Windmills can be installed at the edge of your pond or several hundred feet away utilizing Airmax® Direct Burial Airline* (100' included). The airstone should be placed near the deepest area of your pond. Please note: If you are using multiple airstones, you will need to adjust your airflow. Air follows the path of least resistance, so it will go to shallower airstones first.

*Airmax® Direct Burial Airline should be used when trenching airline underground while Airmax® EasySet™ Weighted Airline is intended for underwater use.

Please Note: 4 Leg Windmills come as a 3 Leg Windmill Kit with a 4th Leg Conversion Kit.


Replacement Parts

  • 1 | Windmill Tower Hinges

    Item Number 600512

    Price : 69.99

  • 2 | Additional Windmill Airstone Kit

    Item Number 600510

    Price : 129.99

  • 3 | Windmill Freeze Prevention Control System

    Item Number 600511

    Price : 129.99

  • 4 | Replacement Windmill Airstone With Check Valve

    Item Number 600513

    Price : 69.99

  • 5 | Replacement Windmill Airstone

    Item Number 600516

    Price : 49.99

  • 6 | Airmax® EasySet™ Weighted Airline - 3/8" Diameter - 100' Roll

    Item Number 510118

    Price : 129.99

  • 7 | Airmax® EasySet™ Weighted Airline - 5/8" Diameter - 100' Roll

    Item Number 510119

    Price : 179.99

  • 8 | Airmax® EasySet™ Direct Burial Airline - 5/8" Diameter - 100' Roll

    Item Number 510120

    Price : 49.99

  • 9 | Airmax® EasySet™ Airline Connector Kits - 3/8" Connector Kit

    Item Number 490204

    Price : 4.99

  • 10 | Airmax® EasySet™ Airline Connector Kits - 3/8" to 5/8" Connector Kit

    Item Number 490205

    Price : 6.99

  • 11 | Airmax® EasySet™ Airline Connector Kits - 5/8" Connector Kit

    Item Number 490206

    Price : 4.99

What others are saying

4 out of 5

Customer Rating

"20"Jeannette Lemke of Mitchell, SD

Definitely like the windmill now that it is up and running. Need to have better instructions with a larger and better picture of what it should look like when done. Order the weighted air line because the other one just floats on top of the pond and it looks dumb. it also would be helpful to know what it looks like when you bring it down with the hinges.

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