Kasco® Robust-Aire Diffused Aeration Systems without Cabinet

Kasco Marine


These Kasco® Robust-Aire™ Aeration Systems come without protective cabinet. See additional listings for cabinet or post-mount options.

Kasco® Robust-Aire™ Aeration Systems are available as complete packages from one to six diffuser heads and come complete with everything you need, including all connectors and adapter fittings.  Installation is quick and easy with exclusive Kasco® SureSink™ weighted airline, which simply sinks in place without separate weighting or anchoring.

  • No floating equipment near surface and no electrical components in the water
  • Low maintenance rocking-piston compressors built for continuous operation
  • Compressors are ETL Listed to UL and CSA safety standards
  • 2 Year Warranty
System Maximum
Pond Size
3/8" Tubing
RA1 1.5 surface acres 100' 1 50'
RA2 3 surface acres 200' 2 50'
RA3 1.5 surface acres 300' 3 50'
RA4 8 surface acres 400' 4 50'
RA5 10 surface acres 500' 5 50'
RA6 11 surface acres 600' 6 50'

Remote Manifold (RM Option)
Robust-Aire™ systems are available with an optional remote manifold which allows you to install the compressor up to a mile away from the water's edge! The remote manifold allows you to adjust airflow to each individual diffuser head to get the balance of airflow and performance you need. Simply run PVC pipe from the compressor to the remote manifold located near the edge of the lake or pond.

Oversize Compressor Choices (DP and XL Options)
The Robust-Aire™ systems all come with Teich-Aire compressors, but for heavier duty applications, two larger sizes are available: DP and XL.

System Standard DP XL
Flow per
Flow per
Flow per
RA1 2.5/1.2 3.2CFM - - - -
RA2 2.5/1.2 3.2CFM 3.5/1.6 2.4CFM 6.1/3.4 3.4CFM
RA3 3.5/1.6 4.8CFM - - 6.1/3.4 2.3CFM
RA4 5.1/2.6 6.4CFM 7.0/3.5 2.4CFM 12.2/6.8 3.4CFM
RA5* 6.2/2.9 8.0CFM 7.0/3.5 (2) 2.4CFM
(3) 1.6CFM
12.2/6.8 (2) 3.4CFM
(3) 2.3CFM
RA6 7.0/3.5 9.6CFM - - 12.2/6.8 2.3CFM
*RA5 systems use different sized compressors, so two diffusers operate at one flowrate, while three diffusers run at another.

Top Selling Brands