RobustAire™ Diffused Aeration RA11
- Lifetime warranty on diffusers and cabinet; 15 years on tubing
- AireGuard noise-reducing cabinet on every RobustAire system
- Cabinet sits on the bank - nothing to pull out before freeze-up
- Tubing included on RA1 to RA3 and all Home Series systems
This part ships in a Fountain Depot service kit. Call or text 1-855-752-5795 and we will put the right kit together for your unit.
Small parts are sold in kits that include the matching hardware and service parts.
This part is sold as an add-on. Add a Kasco unit, motor or kit to your cart first, then add this part to the same order.
- Authorized Kasco dealerFull factory warranty honoured
- Certified repair centreFactory-trained bench in Markham
- Ships Canada-wideFree on parcel orders over $250
- A human answersCall or text 1-855-752-5795
Diffused Aeration Systems
RobustAire™ Diffused Aeration RA2
$5,620.20
Home Series Diffused Aeration System DA2 (120V)
$2,827.50
Home Series Diffused Aeration System DA1 (120V)
$2,537.50
RobustAire™ Diffused Aeration RA12
$19,831.65
RobustAire™ Diffused Aeration RA11Viewing
$19,366.20
RobustAire™ Diffused Aeration RA10
$18,883.35
RobustAire™ Diffused Aeration RA9
$16,385.00
RobustAire™ Diffused Aeration RA8
$15,871.70
RobustAire™ Diffused Aeration RA7
$15,406.25
RobustAire™ Diffused Aeration RA6
$9,626.55
RobustAire™ Diffused Aeration RA5
$9,145.15
RobustAire™ Diffused Aeration RA4
$8,665.20
RobustAire™ Diffused Aeration RA2DP (Double Piston)
From $3,754.05
RobustAire™ Diffused Aeration RA3
From $4,544.30
RobustAire™ Diffused Aeration RA1
From $2,364.95
Home Series Diffused Aeration System DAH2 (208-240V)
$2,827.50
Home Series Diffused Aeration System DAH1 (208-240V)
$2,537.50
Overview
Kasco RobustAire systems are designed to deliver efficient bottom-up aeration by circulating large volumes of water and improving oxygen transfer. The RobustAire RA11 Aeration System features 11 diffusers, four KM-120 compressors (3/4HP x4), and 120V power, making it ideal for very large water bodies requiring extensive aeration coverage.
Specifications 2 models
- Make
- Kasco Marine
- Model
- RA11
- Series
- RobustAire
- Diffusers
- 11 dual-loop
- Compressor
- (4) 1/2 HP
- Cabinet
- Large, AireGuard noise-reducing
- Tubing
- Sold separately
- Origin
- Made in USA - Prescott, WI
Manuals & drawings
Warranty
- Diffusers & cabinet
- Lifetime
- Tubing
- 15 years
- Compressor
- 3 years (wearable parts 2 years)
- Serviced by
- Our Markham repair centre
Electrical connections should be made by a licensed electrician to local code.
Does the system come with tubing?
Up to a point, and this is the single most important thing to check before budgeting. RA1 includes 100 ft of 3/8 in. tubing, RA2 and RA2DP include 200 ft, and RA3 includes 300 ft. Every Home Series system includes SureSink tubing for its diffusers.
From RA4 upward, tubing is ordered separately. On a large pond that is a meaningful line item, so factor the run from the cabinet to each diffuser into your costing.
How many diffusers does my pond need?
Diffuser count is driven by surface acreage, but placement is driven by shape. A round one-acre pond behaves very differently from a long, narrow or multi-lobed one of the same size.
Systems run from a single diffuser up to twelve on the RA12. Send us your acreage, maximum depth and a rough outline and we will lay out the placement before you order.
What is the difference between RobustAire and the Home Series?
Scale and construction. Home Series uses single-loop diffusers with a 1/4 HP basemount compressor and a 2-year warranty on all items - built for backyard ponds with one or two diffusers.
RobustAire uses dual-loop diffusers in a noise-reducing AireGuard cabinet, scales from one to twelve diffusers with up to four compressors, and carries 3 years on the compressor, 15 on the tubing, and lifetime coverage on the diffusers and cabinet.
Diffused aeration or a surface aerator?
Depth decides it. A surface aerator or fountain works the top few feet and covers a wide area. Diffused aeration releases air at the bottom and lifts the entire column, which is what deep or stratified water actually needs.
Under about eight feet, a surface aerator is usually enough. Deeper than that, diffusion is the right tool, and on larger water the two are often run together.
Can I run it through a Canadian winter?
Yes, and on many ponds it is the reason to buy one. Because the cabinet sits on the bank and only tubing enters the water, there is no motor in the pond to pull out before freeze-up.
Run through winter and the rising bubbles keep an opening in the ice, letting trapped gases escape and reducing the risk of winterkill. Diffuser placement should be adjusted for winter operation - ask us before the first freeze.
How noisy is the compressor?
Quieter than most people expect, but not silent - it is a piston compressor running continuously. RobustAire cabinets use AireGuard noise-reducing construction specifically for this reason.
On a residential shoreline, siting matters as much as the cabinet. We can advise on placement relative to the house and the property line.