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Kasco Robust Aire Pond Aeration System - RA1


This system includes:
  • A single piston compressor
  • One, 100 foot roll of 3/8 inch Sure Sink weighted tubing
  • Robust Aire diffuser assembly
  • Post Mounted Cabinet (optional)

Robust-Aire Diffusers
Robust-Aire diffusers are the most efficient on the market and create more water flow to aerate your pond. Diffusers are designed to provide a fine air bubble with the least amount of pressure. The base is made of thick HDPE plastic and a locking fill plug allows you to fill it with pea gravel or other weighted substrate. It has a raised design that keeps the diffusers performing at an optimal level above the pond bottom. A durable, bolted, strain relief attachment ensures that the weighted tubing will not become detached during installation or maintenance. A check valve with Viton seals keeps water from entering the tubing when the system is not operating.


The RA1 system is available with three options for enclosures:

Large Base Mount Cabinet
• Dimensions are 24” x 18” x 20”H
• 120 volt receptacle or a 240 volt junction box
• A single cooling fan provides 110 CFM ventilation
• Compressor is mounted at the factory in the cabinet which is provided with acoustical foam and a keyed cabinet lock.

Post Mounted Cabinet is mountable on an exterior wall or wooden post.
• Dimensions 19” x 12” x 12”H.
• 120 volt receptacle or a 240 volt junction box.
• A single cooling fan provides 110 CFM ventilation.
• Compressor is mounted at the factory in the cabinet which is provided with acoustical foam and a keyed cabinet lock.

No Cabinet:
This is desired when installing the compressor system in your own structure. Compressors need to be kept out of the weather in a well-ventilated area. A galvanized mounting bracket system is included with each compressor to allow mounting to a floor, wall, or pedestal. Rubber mounting feet and all hardware are included as well. Remote manifold is easily mounted via wood screws.

Sure Sink Weighted Tubing
Available in easy to handle 100 foot coils. RA systems 1-3 include 100 feet of 3/8 tubing for each diffuser. Each coil is boxed and includes our full packet of barbed connectors and adapter fittings, and all-stainless steel tubing clamps. You will be prepared to make any connection necessary with the tubing kit. Additional 3/8 or 5/8 Sure Sink weighted tubing is available when additional length is needed.

Robust-Aire Rocking Piston Compressors
• Provide efficient, continuous-duty operation with minimal maintenance and quiet operation. Units are extremely quiet.
• 25 psi pressure relief valve
• Air filter with replaceable cartridge
• Sound level is less than: 70 dB without cabinet (Window air conditioner), 65 dB with cabinet and acoustic sound proofing (Normal conversation)
• Safely starts under pressure. Maximum operating depth 40 feet.

Warranty: One year complete warranty on all parts.

Advantages Of Using A Robust-Aire System
  • No electricity in the water. This can be especially important where swimming is allowed.
  • No floating equipment at the surface. Boating is not hindered and the natural view of the lake can be enjoyed.
  • No electricity needed at the edge of the pond or lake. Robust-Aire can be remotely installed away from the water’s edge. Air can be delivered to the water’s edge instead of electricity. This can result in an installation cost savings. This option may be preferred where it is more convenient to have the compressor system consolidated with other equipment.
  • Robust-Aire is more effective at aerating deeper waters than a floating fountain or high-volume surface aerator. Robust-Aire becomes effective at 8 feet of depth and increases efficiency with respect to water flow at the water deepens. Water is pumped directly from the bottom, all the way to the top. Robust-Aire compressors can inject air 50 feet deep!
  • Robust-Aire is cost effective to purchase and operate for larger surface areas. These systems can effectively destratify and aerate deep lakes with much lower equipment costs and energy consumption. Robust-Aire systems are the most efficient on the market.
  • Low maintenance. Most maintenance and inspection may be conducted onshore. Rocking piston compressors do not require internal maintenance as often as other compressors.

Pond Size
(surface area)
120v/240v CFM @
10 PSI
Sure Sink Weighted
3/8'' Tubing
RA1 1.5 1 2.5/1.2 3.7 100 feet 50 feet
RA2 3 2 2.5/1.2 3.7 200 feet 50 feet
RA3 4.5 3 5.1/1.8 5.1 300 feet 50 feet