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Nelsen AIO Air Injection Oxidizing Iron Filter System 2.0 Cu. Ft.

AIO-12-FE by Nelsen
List Price: $1,699.99
Our Price: $1,189.55
Savings: $510.44 (30%)
Weight: 137 lbs


Eliminate rust staining, as well as reduce sulphur "rotten egg" odors with the Nelsen AIO Air Injection Oxidizing Iron Filter System.

Iron and Sulphur are two of the most common elements found in nature, while both are extremely important for every day life, both are a nuisance in water and can cost you money and cause frustration.

Iron staining is a common problem in homes today. Iron staining on fixtures, as well as dingy clothes and sometimes even hair will turn a reddish orange color. Iron bacteria may be present in water with iron, creating a slimy build up in standing water (such as your toilet tank) and can smell like rotting vegetation. Sulfur is easily detected by the presence of a "rotten egg" odor, and is sometimes associated with yellow staining.

The Nelsen AIO Filter System, as a single tank system, is an efficient and cost effective system for the removal of iron and sulphur. The Nelsen AIO maintains an "air pocket" in the top of the tank while the system is in service. As the water passes thru the air pocket, iron and sulphur are oxidized. Additionally, dissolved oxygen is added to the water. The Nelsen AIO filter media bed then removes the iron and sulphur from the water.

The Nelsen AIO can remove Hydrogen Sulfide and up to 7 ppm Iron. A daily backwash will remove accumulated iron and replenish the filter media bed. The regeneration process also adds a fresh air pocket to the system.

The Nelsen AIO system comes equipped with a Fleck 2510SXT air injection control head that automatically backwashes the system daily to clean the media and flush everything down the drain. By utilizing a patented piston in the control valve, the Nelsen AIO is able to put the whole oxidation process inside one tank, keeping maintenance costs and down time to a minimum.

The systems include 3/4" by-pass valve, Structural mineral tank and all necessary media and support bed for individual application.


Tank Volume: 2 cu. ft.

Inlet/Outlet: 3/4 inch

Maximum Water Temp: 100°F / 38°C

Water pH Range: 7.0-9.0

Bed Depth: 30-36 in.

Freeboard: 50% of bed depth (min.)

Backwash Rate: 10-12 gpm sq. ft. / 37-45 lpm sq. ft.

Backwash Bed Expansion: 20-40% of bed depth (min.)

Service Flow Rate: 3.5-5 gpm (13-18 lpm) /sq. ft. intermittent flow rates and/or favorable local conditions may allow higher flow rates

Conditions For Operation

  • Alkalinity should be greater than two times the combined sulfate and chloride concentration.
  • Dissolved Oxygen (D.O.) content must be equal to at least 15% of the iron (or iron and manganese) content.

Influent And Backwash Limitations

  • Free chlorine concentration less than 0.5 ppm
  • Hydrogen Sulfide should be removed prior to contact with Birm media
  • Oil: None Present
  • Polyphosphates: None present