Flexx inFusion - Iron And Sulfur System

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The Flexx inFusion filter system utilizes the continuous injection of hydrogen peroxide to remove hydrogen sulfide (rotten egg odor) and iron
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The Flexx inFusion filter system utilizes the continuous injection of hydrogen peroxide to remove hydrogen sulfide (rotten egg odor) and iron through a process known as oxidation. In use since the 1970s, this technology is still popular because it specifically oxidizes sulfur compounds without producing toxic byproducts. The Flexx inFusion is a residential-grade proportional injection system built with industry leading technology. As proof of that, we've backed it with a full 7-year warranty.


Typical Contaminant Removal


Up to 20 ppm

Hydrogen Sulfide

Up to 30 ppm


Up to 1 ppm

pH Levels

Works effectively from pH levels of 6 to 9

Reducing Bacteria

Also works with Iron & Sulfur Reducing Bacteria (IRB & SRB)

All NSF Approved Components

Key Product Features

  • Ease of use - Programs in 30 Seconds
  • Electronic controller has only one internal moving part - simple to set 
  • Meter counts the gallons used and monitors flow rates 
  • Long life due to superior backwashing features of the Catalytic Carbon life  
  • 12 volt no-shock electrical system uses less than $2.00 electricity per year 
  • Battery backup keeps the memory during power outage 
  • Utilizes the Stenner Injection Pump & Meter 
  • The system removes silt, sand, sediment and cloudiness 
  • Extremely user-friendly 
  • Low maintenance due to automatic operation 
  • The system includes a 15-gallon peroxide tank, Stenner Pump and Meter, inFusion filter, and 5 Gallons H2O2



Stay Connected to Your Water

Our smart valve system integrates directly with your smartphone via Bluetooth 5.0. Simply download the free Legacy View companion app, pair the devices, and you'll have access to a real-time dashboard and settings.

The application allows you to adjust the system to your desired specifications and track and monitor all water usage.

  • Communicates with your
    Smartphone via Bluetooth

  • Simply set the time of day, time of
    regeneration, and backwash

  • Fully programmable cycles

Legacy View        
Google Play  Apple App Store

Automatic Backwash

The Flexx inFusion Filter System uses hydrogen peroxide to oxidize iron and hydrogen sulfide by using Catalytic Carbon filtration media in the filtration process. An Automated Backwashing is then performed approximately every two days by the Flex control valve which then cleans the bed. In the most extreme instances,  daily backwashing may be needed.


The Case For Hydrogen Peroxide (H202)                      

Powerful- H2O2 is one of the most powerful oxidizers; known to be stronger than chlorine, chlorine dioxide, and potassium permanganate. Only fluorine, the hydroxyl radical and ozone are better oxidizers, but all are either deadly poison or cost prohibitive.

Safe- Despite its power, H2O2 is a natural metabolite of many organisms, which decompose the H2O2 they produce into oxygen and water. H2O2 is also formed by the action of sunlight on water a natural purification system for our environment. Consequently, H2O2 has none of the problems of gaseous release or chemical residues that are associated with other chemical oxidants. And since H2O2 is totally miscible with water, it reverts back to hydrogen and oxygen after the reaction is complete.

Versatile- The fact that H2O2 is used for seemingly converse applications proves its versatility. It can treat both easy-to-oxidize pollutants (iron and sulfides) and is lethal to iron, sulfur and manganese.

Selective- H2O2 can be used for such diverse applications due to the different ways in which its power can be selectivity directed. By simply adjusting the conditions of the reaction (e.g., pH, temperature, dose, reaction time, and/or catalyst addition), H2O2 can often be made to oxidize one pollutant over another, or even to favor different oxidation products from the same pollutant. It is a fantastic oxidizer, much better than chlorine and potassium permanganate, and poses no health hazard.

Advantages- Complete elimination of iron and sulfur, regardless of the levels, without the use of dangerous chemicals. Rest assured that it will eliminate iron and sulfur and the rotten-egg odor, even if the water contains iron and sulfur-reducing bacteria. It also has a relatively low cost, using only 20 to 40 gallons of hydrogen peroxide a year for a family of four.

Typical Oxidation

OxidantOxidation Potential (Volts)
Hydroxyl radical2.8
Hydrogen Peroxide1.8
Potassium Permanganate1.7
Chlorine Dioxide1.5

System Includes



ModelBathroomsPeak FlowBackwash FlowFilter Tank SizeSolution Tank
081-FIF-1501-210 GPM5 GPM10" x 54"15 Gallon
081-FIF-2002-3.515 GPM8 GPM12" X 52"15 Gallon
081-FIF-2504-620 GPM10 GPM13" X 54"15 Gallon
081-FIF-3007+25 GPM10 GPM14" X 65"15 Gallon

additional information

WarrantyLifetime on Carbon Tank, 7 Year warranty on Carbon Filter Valve & Valve Electronics, and a 5 Year warranty on Precision Injection Panel
ManufacturerUS Water Systems