The 4-legged 20' Windmill Aeration System pairs the classic four-post farm windmill profile with working bottom aeration. The wider stance adds strength and stability in exposed, high-wind locations, while the 73" self-governing head and BalCam II compressor deliver up to 4.5 CFM of air on nothing but a 3–5 mph breeze — no electric service required.
What's Included
- Galvanized steel tower with hinges
- 73" galvanized self-governing windmill head
- BalCam II compressor
- 1 airstone diffuser with check valve
- 100 ft of ½" non-weighted poly airline
Specifications
| Tower Height | 20 ft |
| Tower Design | 4-leg, 18-gauge galvanized steel |
| Windmill Head | 73" galvanized steel, self-governing |
| Compressor | BalCam II reciprocating, stainless steel components |
| Max Air Output | Up to 4.5 CFM |
| Startup Wind Speed | 3–5 mph |
| Pond Coverage | Up to 1 acre (expandable with added diffusers) |
| Max Pond Depth | Up to 30 ft |
| Assembled Weight | 315 lbs |
| Warranty | 5-year compressor & bearings, 1-year other components |
Prefer the lighter-footprint version? The same kit is available on our standard 3-leg tower. For two-diffuser coverage out of the box, step up to the 4-Leg Deluxe kit.
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