The Koenders Windmill was invented in 1988. Since then, we have served over 100,000 customers worldwide. Providing quality windmills, electric and solar aerators, and environmentally friendly pond care solutions.

Many of the first and second generation windmills sold all those years ago are still in use. That’s over 30 years standing up to the elements; hot and cold, wind and snow.

We are currently producing our 6th Generation models of Koenders Windmills. That means you can be assured that you are buying the most durable and efficient aeration systems available on the market.

If you need maintenance or replacement parts...

BEWARE of inferior, imitation Koenders parts and products and companies that promote them. These parts will not fit, or will break prematurely. This will also void the product warranty. Most of these online retailers are NOT AUTHORIZED KOENDERS DEALERS.

Why are genuine Koenders windmills and electric aeration parts superior to imitation parts?

01

All of our windmill parts, tower, tail, and fan assembly, are hot dipped and coated with the highest quality galvanized finish. Others use lower quality galvanizing. The Koenders approach ensures our product components do not prematurely rust, break, and will last decades.

02

Koenders Windmills tower, tail, and fan assembly parts are made from high quality 18-gauge steel which is die-form stamped for strength and consistency. Many of the parts used in higher stress areas are heavier 12 gauge steel.

03

We own the rights to the state-of-the-art dies used in our parts. While these dies are expensive, this attention to detail allows us to produce precision parts while maintaining proper fit and durability through the manufacturing process.

04

Koenders Windmills use a diaphragm style compressor. These diaphragms require periodic replacement. A genuine Koenders diaphragm repair kit is U.S. made from a high quality Garlock reinforced rubber blend material. This material is the best available, maintaining proper strength and stiffness, even in extreme heat or cold. Many of our customers have reported an 8 to 10 year diaphragm lifespan.

05

Inside our windmills are small valves the width of a penny. These valves are very important; if they do not operate correctly the compressor does not work. We have upgraded the original valve and replaced the rubber insert with 1.5 mm double skinned nitrile butadiene with cotton weave. Nitrile is one of the strongest rubbers available, able to withstand cracking in heat or cold, so longevity is increased substantially.

To avoid issues: Order directly from Koenders Windmills,
Koenders Water Solutions, or one of our Authorized Dealers.

How do you know they are an Authorized Koenders Dealer?

An authorized dealer will clearly indicate they are on their website. If they don’t, they are not an authorized dealer. For Sales, Support, or Customer Service, call toll free at 1-877-888-7707, or find a dealer closest to you.