The KDF MediaGuard filter system can be added to any of our water softeners to give it an extra level of filtration capability. For well water, add the KDF-85 MediaGuard to remove moderate amounts of iron and hydrogen sulfide (up to 1 ppm iron and/or H2S). MediaGuard is mounted between the control valve and the tank, exhibiting consistently superior KDF Process Media as pretreatment media to improve the performance and economy of your water softener system. The MediaGuard “twist-locks” onto the valve base and simply slides down the riser tube (will not work on the Turbulator riser). Water enters the MediaGuard and is distributed into the four chambers containing the KDF media. As it enters the chambers, the media is picked up and “swirls” with the water – this mixing action greatly increasing the contact time with the water. The water then exits the chambers where it continues on through the softener resin and then exits through the riser tube. During backwash, the flow is reversed. The resin is lifted and cleaned of sediment, and the KDF media releases any oxidized contaminants, revitalizing them. The item “KDF 85 Media Guard Add-On Filter for Whole House Water Softener & Filter” is in sale since Wednesday, November 10, 2021. This item is in the category “Home & Garden\Kitchen, Dining & Bar\Small Kitchen Appliances\Water Purification\Water Filters”. The seller is “aquatrue” and is located in Ontario, California. This item can be shipped to United States.