Please place Orders Online

Email Questions

Technical Support 7 days a week. is a BBB Accredited Water Conditioning Equipment Store in Venice, FL
Knowledge Base:  
You are here: Knowledge Base > General questions - Water Treatment
Last Updated: 01/15/2020
An AIO Filter ( AIR INJECTION OXIDIZING FILTER SYSTEM ), when properly applied, is an efficient and cost effective system for the removal of iron and sulphur. An AIO system maintains a compressed “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. An AIO filter media bed then removes the iron and sulphur that has been oxidized from the water ( traps in the media bed ).

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.
Application Parameters pH (Minimum) 6.8 and Iron (Maximum) 7 ppm and Sulphur (Maximum) 8 ppm.
Note: Three different medias are used depending on whether the problem with the water is primarily IRON or Hydrogen Sulfide odor.

*** We do NOT sell this system -- We can get most parts, if you have part numbers or can provide descriptions with photos of what have and what you think you need.

** Here is a link to Service / Installation Manual for a popular Brand of AIO ( sold through Nelsen Corporation ),

The Media can be BIRM ( iron removal ), Catalytic Carbon ( odor removal ) or Katalox Light ( a combination of Iron and Odor removal possible ).
It all depends on the application ( what is needing to be REMOVED from the Water - Iron or Hydrogen Sulfide and the LEVELS of these in the source water ).

And the two critical parts used to "convert" the Valve are:
1 ) Check Valve on the Inlet to prevent the "air" from escaping.
Here is photo of this used with a Fleck valve,

2 ) A screen ( and air check ) used on the Brine Connection to "draw" the AIR into the tank ( during the "suction" cycle ).

*** NOTE: We do not currently sell either of these parts. Just as we do not sell the Valves or System that use AIO.
And for "iron removal", see more information -
"Do I need an Iron Filter?"
And for odor issues - "Odor - Sulfur ( Hydroge Sulfide ) in your water"

If you need a complete NEW AIO system, then we would recommend,
The NWTS Signature Series AIO™ features a unique patented process. Most systems purge the air pocket in the tank violently during the regeneration process potentially damaging plumbing and creating an excessive amount of noise. Our patented-process slowly releases the air pocket during regeneration before replenishing the tank with a fresh pocket of air. Additionally, our system will delay the regeneration process and air release if water is being used in the home or business. Once water flow stops, the regeneration process begins slowly releasing the air from the system. On some competitive systems, water use will prevent the release of air due to the internal design limitations of the control valve or violently release the air once water flow stops. Professional Water Treatment Dealers can now offer the important advantages of the Nelsen Water Treatment Solutions AIO with Control Flow Technology to their customers.

Please Rate the Usefulness of this Article


Related Articles
 > # 1 FAQ = High Water in Brine Tank - Problem -Softener does not remove the water from my salt tank or overflow
 > Links to Other Websites
 > How and Why to use Acid Neutralizing Media Calcite and Corosex ( Magnesium Oxide )
 > No Pressure Unless the Softener is By Passed
 > How a water softener actually works and why does it feel slimy
 > Average Salt Amount Needed and Normal Water Level In Brine Tank
 > Salt Usage In Water Softening
 > No Salt Systems for Water Softening
 > Dishwasher Glassware Etching Cause Explained
 > Air in water lines after Softener Regenerates
 > Common Water Problems
 > ECO - Friendly Alternative to SALT Softeners
 > How do you determine if you actually need a softener?
 > How do you put a softener out of service without damaging it?
 > How Long Until Water Feels Soft Again After Repair
 > Hydrogen Sulfide levels affected by amount of water used and the ground water table
 > Will a Water Softener remove the iron from my water?
 > Iron Staining and my Water Softener seems to be working okay, Why is that?
 > Odor - Sulfur (Hydrogen Sulfide) in your water
 > I have a Water Softener, but I still have odor in my water. Why is that?
 > Orange Sand Coming Into House
 > Salty Water Taste in the Morning
 > High Water in Brine Tank - Problems and Solutions
 > Sodium in the Water Softening
 > What Brine ( Salt ) Setting Amount to Use?
 > Will a Water Softener make my water safe to drink?
 > Stains in Laundry - several possible causes
 > Looking for someone to Service My Water Softner ( Softener ) in my area.
 > Pump Pressure Low or Cycles OFF and ON ( Well Water )
 > Stinky - Rotten Egg - Odor
 > Sodium Levels in Water when Softened
 > Air Check inside Brine Tank can becomes Stuck or Water Logged
 > Aerator Use and Cleaning Q & A
 > Air Check - Ball seated or dropping early during the BRINE/SLOW RINSE portion on the 155 or 255 Series Valve
 > Brine Valve Replacement in Salt tank ( with Float Shut Off )
 > UV for Water Purification - Does it Work?
 > Why Gravel is Not Needed in Residential Size Water Softener
 > Frequency of Regeneration - How Often Should Softener Recharge?
 > Fittings Measurements Different Then Expected ( 1/4 and 3/8 fittings )
 > Choosing a Resin - What is the Difference
 > Basic Installation Guide for New Water Softener
 > Which is better or cheaper... Powdered Resin Cleaners or Res-Up Liquid?
 > Choosing a Softener System - Which Brand is Best?
 > Sediment filter ahead of the softener - When, Why, and Which one.
 > Brine Tank Assembly - Questions, Answers, Video Link
 > ChemTech and Pulsafeeder chlorine solution pumps
 > Potassium Chloride - Substitute for Salt ( Sodium Chloride )
 > Pressure Drop or Flow Rate reductions through a Water Softener / Filter System - Things to Consider
 > Recommendation of Fleck 5600 Econominder and Hankscraft Equivalent water softener replacement valves - Which Brand is Best?
 > How does Hankscraft metered valve compare with the Fleck 5600 or the Hankscraft digital unit in terms of lasting durability
 > MediaGuard filter on Distributor Tube can cause pressure loss
 > Do I need an Iron Filter?
 > Salty Water Taste - New Valve Installation
 > Motor Identification - How to determine Type and Part Number
 > Irrigation - Iron Removal options