Double Diaphragm Windmill Aeration System

The Koenders Double Diaphragm Windmill Aeration System is our most powerful wind-driven aerator, built for larger ponds and sites that need more air or more than one aeration point. Its double diaphragm compressor feeds two airstones through a two-way valve, delivering bottom-up aeration that circulates the whole pond, prevents stratification and stagnant water, and helps stop turnover and winter fish kills, with no electricity and no chemicals.

The double diaphragm system suits larger or deeper ponds and lets you aerate two locations at once for better coverage.

Features and benefits

• Wind powered, with no electricity or ongoing energy costs
• Double diaphragm compressor for larger ponds and higher air volume
• Runs two airstones through a two-way valve for wider coverage
• Bottom-up aeration that circulates the full water column
• Helps prevent stagnant water, pond turnover and fish kills
• Galvanized tower and components built for harsh outdoor conditions
• Backed by a full 1 year warranty

What is included

Every Double Diaphragm system includes the windmill head with a 26 inch blade and tail box, a double diaphragm air compressor, two airstone diffusers, two foot valves, a two-way selector valve, and 200 feet of 3/8 inch polytubing airline. Taller towers add stacking tower box sections:

• 12 ft: 8 ft and 12 ft tower boxes
• 16 ft: 8, 12 and 16 ft tower boxes
• 20 ft: 8, 12, 16 and 20 ft tower boxes
• 24 ft: 8, 12, 16, 20 and 24 ft tower boxes

Choosing your tower height

Taller towers reach cleaner, steadier wind, so choose based on your site. Open, exposed sites can use a shorter tower, while sites with trees, buildings or rolling terrain benefit from a taller tower to clear the turbulence. If you are unsure, contact our team and we will help you size the right system.