Airmax PS40 4 Acre Pond Aerator



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  • Aerates ponds up to 4 acres in size, up to 50 feet deep.
  • The deeper the pond, the larger the aeration area. See below:
    • For ponds 6'-9' deep, the PS40 will aerate up to 2 acres.
    • For ponds 9'-12' deep, the PS40 will aerate up to 3 acres.
    • For ponds over 12' deep, the PS40 will aerate up to 4 acres.
  • Available in 115V or 230V.
  • Comes with:
    • 4 Weighted Diffusers (rests on bottom of pond).
    • (4) 100' rolls of 3/8" weighted airline (additional airline available).
    • 3/4 horsepower rocking piston compressor with pressure gauge & relief valve. Includes 6 foot power cord.
    • Weatherproof cabinet with built-in cooling system.



Max Pond Size Up to 4 Acres
Max Diffuser Depth 50'
Aerates Ponds up to 6'-9' Deep Up to 2 Acres
Aerates Ponds up to 9'-12' Deep Up to 3 Acres
Aerates Ponds Over 12' Deep Up to 4 Acres
SilentAir Compressor 3/4 HP Rocking Piston Compressor
Running Amps 4.3 or 2.15
Voltage 115V or 230V
Wattage 495 Watts
Max CFM 5.6
ProAir4 Diffusers 4 Diffusers
Airmax Composite Cabinet Standard Cabinet
Cabinet Dimensions 23"L x 17"W x 15"H
Power Cord 6' Cabinet Cord
2'6" Compressor Cord
Monthly Operating Cost (24/7)* $35.40
ProAir Diffuser Warranty 5-Years
Compressor & Electrical Component Warranty 3-Years
Composite Cabinet Warranty 10-Years
EasySet< Airline Warranty 5-Years


THE WORLD'S BEST AERATOR: The most effective, quiet, efficient and easiest to install. Aeration adds valuable oxygen to a pond or lake, particularly on the pond's bottom where muck and organic debris accumulates. A properly sized aerator works from the bottom up to ensure all areas of the pond are circulated and saturated with dissolved oxygen leaving you with a cleaner, clearer and balanced pond.


Airmax® Aeration systems utilize a shore-mounted air pump that delivers air to specialized diffuser plates that are located on the pond bottom. Resulting in a column of rising bubbles that circulates water throughout the pond, eliminating a change in temperature or thermocline. With increased oxygen and added natural bacteria, any excess nutrients in the pond or lake are metabolized, resulting in cleaner, clearer water and less muck. Results you can see in just 90 days! 


Easy Installation with Options - Airmax Aeration Systems are the easiest and most versatile systems to install on the market. PondSeries PS40 With 4 Diffusers Aeration System can be installed at the water's edge or up to 1/4 mile away from the pond or lake. No power is needed at the shore, and select from 115V or 230V systems. Airmax EasySet airline delivers oxygen to the water without the added expense of hiring an electrician.

Airmax Composite Cabinet - ETL electrical safety certified composite cabinet has a quiet design with a faux rock finish to blend into any landscape. The removable top and side high-density air intake filter protect the compressor and pre-wired electrical box from outside contaminants while providing easy access. Other cabinet features include an elevated base protecting against damaging flood water and a ventilation fan with a rain shroud that cools and protects against moisture and heat damage. Cabinet dimensions: 23"L x 17"W x 15"H. Comes with a 10-year warranty.

SilentAir Compressor with SmartStart Technology (IST) - The heart and soul of each PondSeries Aeration System is a powerful whisper-quiet SilentAir 3/4 HP Rocking Piston Compressors built with SmartStart Technology (IST) to protect the compressor during pressurized restarts following power supply interruptions. Each highly efficient 115V or 230V compressor has rubber mounts to reduce noise and vibrations and ensure a silent operation. Each compressor can push up to 5.6 CFMs of oxygen to your pond while costing as little as $35.40 a month. Comes with a 3-year warranty.

Airflow Manifold Assembly - Airmax simplifies airflow management to individual diffusers with a 4-port manifold with nickel-plated ball valves. Optional airline quick disconnects can be added for simplified removal during maintenance or for winter storage of systems that do not run year-round. PondSeries PS40 With 4 Diffusers is set up for 3/8" or 5/8" airlines.

ProAir 4 Weighted Diffusers - Designed for maximum oxygen uptake, 4 ProAir 4 Weighted Diffusers incorporate high-efficiency, low-maintenance membrane sticks to release tiny oxygen bubbles into the water column. Membrane diffusers have the synergy of air stones without the headaches of cracking and acid-washing. The ProAir 4 Weighted Diffuser has an integrated check valve to prevent back-pressure on the compressor. The innovative sled design keeps the ProAir 4 submerged while maintaining an upright position during installation. Comes with a 5-year warranty.


Manual (pdf)

Warranty (pdf)


  • FREE Shipping via FEDEX, LTL Ground, & UPS. Ships in 2-3 Business Days. 


  • Ships Only to Lower 48 States of the United States




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