Becker 20' Four Legged Windmill Aerator

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Let Mother Nature aerate your pond!

20′ Four Legged Windmill – High Volume Windmill Pond Aerator

This windmill tower looks more like traditional farm windmills and is more stable than the three legged units. This unit also pumps a large volume of air and has high pressure capability due to large head size for deeper ponds. One piece welded steel hub secures easily to windmill. Windmill aerators can save $30 to $50 per month in electrical costs, paying for themselves in a few short years

BWM20W 20′ Four Legged Windmill Assembly with Quick Sink Tubing

Four Leg – High Volume Windmill Pond Aerator

  • Includes 50′ of poly tubing, 100′ of Quick Sink tubing and dual head Quick Sink diffuser (QS2)
  • 6′ diameter head with 12 blades, tapered blade design allows windmill to turn in low wind and yet produce large air volume in high winds.
  • Windmill pumps 2.9 CFM @ 9 MPH wind, up to 5 CFM in higher winds!
  • Over-speed protection – tail section turns head 12° – 15° away from wind to protect in high wind conditions
  • Includes 48″ long anchor stakes
  • NEW FOR 2020! Hinge kits included with 16′ and 20′ units
  • 7′ – 0″ square base footprint, 23′ overall height
  • Starting in 2020, 16′ and 20′ windmills include a hinge set for easier installation and maintenance
  • Maximum pressure of 30 psi
  • Ideal for aerating remote ponds with no electricity nearby
  • Windmills can sit up to 1000′ away from pond’s edge – use extra poly tubing to get to pond edge
  • Can ship via FedEx/UPS ground – ships best via LTL when available
  • Red Stripe Kit – sold separately
  • Five year limited warranty


23 foot overall height.