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KDF 85 Medium Removes or reduces iron and hydrogen sulfide from municipal or other water supplies. Also controls scale, bacteria and algae.

Redox media alloys function as catalysts to change soluble ferrous cations (positively-charged ions) into insoluble ferric hydroxide, which can be removed with regular backwashing. With enough oxygen dissolved in the water, iron removal rates of 98 percent or better are common. 

You may not even realize that KDF® process media are working for you. KDF media is the core product of many filtration systems, and can be used in conjunction with other products to provide superior purification.

Patented KDF process media consist of high-purity copper-zinc formulations. These substances exchange electrons or bond with chlorine and other metals contained in the water to create harmless substances.

Through this basic chemical process known as redox (oxidation/reduction), KDF process media work behind the scenes to rid your water of chlorine, lead, mercury, iron and hydrogen sulfide. The redox reaction also inhibits the growth of bacteria, algae, and fungi. As an added benefit, KDF media reduce lime scale, mold, and fungi in your tub or shower.

KDF media are environmentally sound and 100 percent recyclable, but refer to the instructions enclosed with your  filter or system for proper disposal, as different manufacturers combine KDF process media with other filtration technologies.  completely safe. KDF media meet EPA and Food and Drug Administration standards for levels of zinc and copper in potable water, so the process is not toxic and does not cause any adverse side effects. KDF media are certified by the NSF Standard 61 and Standard 42 — Your assurance that they meet public safety standards.

Catalytic Carbon - 2 Cu Ft

Catalytic, high activity granular activated carbon manufactured by steam activation of select coconut shell charcoal. The catalytic
activity of this activated carbon makes it highly effective for the removal of chloramines and hydrogen sulfide from potable water. Its large micropore volume makes it particularly well suited for the removal of low molecular weight organic compounds and their chlorinated by-products such as chloroform and other trihalomethanes (THMs). An important feature of this material is its superior mechanical hardness and the extensive dedusting during its manufacture ensures an exceptionally clean activated carbon product.

Features and Benefits
• Catalytic activity
• Large and extensive internal pore structure
• Optimized density
• Maximum hardness
• Low dust and turbidity
• Excellent adsorption capacity
• High volume activity
• Rapid dechlorination
• Low filtered water turbidity Typical Applications
• Residential water treatment systems - Point of Entry (POE) / Point of Use (POU)
• Beverage production
• Protection of ion exchange resins from chloramines
Available Particle Sizes
• 12x40 mesh (0.425 - 1.70 mm)


Whole House Filtration

This unit includes the following:

12" x 52" Mineral Tank (Color Varies)


2 CU FT Catalytic  CARBON


3 Settings Rinse/Backwash/Filter

1" In & 1' Out & 1" Drain

Tanks are shipped out preloaded. The backwash valve is shipped separately.

Manual Controls are simple, reliable and inexpensive. Perfect for medias that require infrequent back washing or locations that lack electrical power.

Manual Valve:
How they work: The Manual valve.  It has very few moving parts and easy to use. When you need to backwash a filter, you put it into the backwash cycle for 10 minutes, followed by a rinse for 3 minutes and then back to the service mode. That is all there is to it. Once a week schedule for backwashing is generally sufficient. For a more economical product and ease of use, we recommend you get this rather than opting for unit that does not backwash, read the section on the benefits of backwashing.

Benefits and Importance of a Backwash Cycle:

As the filter operates in service mode, it accumulates particles in the filter bed. Also since water's nature is to follow the path of least resistance, after time it begins to create channels through the medium. As channels or holes in the media bed form, water begins to flow around rather than through the medium. This process is called "channeling" and it reduces the effectiveness of the filter considerably.

The backwash is accomplished by sending the water down the riser tube from which it enters the filter tank at the bottom. The force of the water is such that it actually lifts the media bed, swirling and tossing the granular medium. The water leaves the filter's drain line. Particles that were in the bed are washed to drain.

The backwash is an intense rinsing and tossing of the medium that lasts for several minutes. In a standard residential filter, a typical backwash lasts about ten minutes.

After the backwash, initiate a rinse of the bed during which water flows downward through the medium, up through the distribution tube and out the drain. The purpose of this rinse is to rinse and settle the bed an prepare it for return to service mode. A regular backwash schedule maintains the efficiency of the filter, as well as providing cleaner water.


**Hydrogen sulfide concentrations exceeding 7 to 10 ppm can be removed by injecting an oxidizing chemical such as household bleach followed up by filtration. The oxidizing chemical should enter the water upstream from the storage or mixing tank to provide at least 30-45 minutes of contact time between the chemical and water. The length of length of the holding time is a function of the chemical dosage, tank configuration and water temperature. Sulfur particles can then be removed using a sediment filter and the excess chlorine can be removed by activated carbon filtration. 

If test results indicate that bacterial contamination is occurring, shock chlorination or disinfection is the most widely suggested method for initial treatment. Shock chlorination (disinfection) is the one-time introduction of a strong solution into the entire water distribution system (well, pump, distribution pipeline, etc.)

When to Shock Disinfect the Well:

Shock chlorination (disinfection) is recommended when lab results indicate a presence of bacteria upon completion of a new well or after pump replacement or repair, when the distribution system is opened for repairs or maintenance, following contamination by flood water, to control iron and sulfur bacteria.

Shock chlorination (disinfection) is recommended in these circumstances to ensure that bacterial contamination is controlled.


This system should be used where low to moderate ferrous (dissolved) iron or hydrogen sulfide contamination is known. This filter is most effective where iron and hydrogen sulfide levels are less then 5 ppm. Best removal rates are achieved where pH is between 6.5 and 8.5 and where water contains some dissolved oxygen.