Rocking Piston Compressor 2685 Series

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Contact us 1-800-442-6648
Current Stock:
2685PE40 / 2685PHI44

Thomas rocking piston compressor is designed and built to meet the demanding needs of year round aeration.

These oil-less piston compressors are designed for intermittent or continuous duty. Don’t battle poor compressor performance or impossible lead times any longer. Choose Thomas for all your compressor installations.

This 3/4 HP pump will work in any aeration system or kit you have.  These can run 5+ diffusers at a time from hundreds of feet away. Can be connected to multiple valved lines for lakes or ponds 2+ acres and over 30+ feet deep. Will work in any Brands kit such as Easypro, Airmax, Kasco, Atlantic Water Gardens, Big Max, and more. These are an OEM Brand new item and come complete w/ the full manufacturer's warranty! These have a capacitor, intake filter, pressure relief valve, brass 90 and fan guards.  No other accessories are included. Motor will need to be mounted away from any source of water - these cannot get wet. 

What’s Included:

  • 3/4 HP Thomas 2685 Series Air Motor
  • Available in 110V or 220V
  • Capacitor
  • 90 Degree Brass Fitting
  • Air Filter
  • Pressure Release Valve

Warranty: 12 Months directly from Thomas

  • Max. Flow - 3.68 cfm, 104.2 lpm
  • Max. Pressure: 120 psi / Restarts under pressure
  • Shipping Weight: 16 Lbs. 


  • Oil-less, non-lube piston and cylinder
  • Permanently lubricated ball bearings
  • Stainless steel valves with patented recessed inlet valve
  • Lightweight die-cast aluminum
  • Thermally protected motor
  • Continuous duty
  • Field service capability
  • Twin fans provide cooling air thru and around motor and cylinders
  • Intake Filter included
  • Capacitor included
  • Pressure relief valve included
  • Brass 90 fitting included
  • Does not Include Motor Mounts
  • All aluminum parts epoxy coated for corrosion protection from moisture
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