4-Leg Galvanized Windmill Aeration Systems

  • 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 galvanized 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, these windmill aerators 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 galvanized windmill can access.

This windmill aerator for sale is 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.
Windmill Diffuser Air Stone with Backflow Valve and 2-Way Valve: Using an additional stone, you can aerate more effectively. This windmill for sale includes an additional air stone, backflow valve, and 2-way selector valve 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

12' Tower
16' Tower
20' Tower
24' Tower
Air Stone Diffuser 1 1 1 1
1/2" Poly 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 utilizing the 100' poly tubing (included) or several hundred feet away utilizing Airmax® Direct Burial Airline* (Sold Separately). The air stone should be placed near the deepest area of your pond. Please note: If you are using multiple airs tones, you will need to adjust your airflow. Air follows the path of least resistance, so it will go to shallower air stones 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.


Usage Information

Replacement Parts

Here are the replacement parts for 4-Leg Galvanized Windmill Aeration Systems.

Weeds Treated

The first step towards effectively treating any pond weed is proper identification. 4-Leg Galvanized Windmill Aeration Systems is recommended for use against each of the weeds listed below. Click on your desired weed for more information and alternate control options.