Ampac KDF-GAC-Poly Phosphate 10″

The KDF-GAC-Poly Phosphate 10″ cartridge combines three filtration and treatment media in a single standard housing. One cartridge handles chlorine removal, heavy metal reduction, taste and odor control, and scale inhibition – tasks that otherwise require multiple inline filters. It fits residential whole-house housings and is commonly used as the pretreatment stage ahead of reverse osmosis systems or as a standalone point-of-entry filter.

What Each Media Does

• KDF (Kinetic Degradation Fluxion): Reduces free chlorine and chloramines through a redox reaction. Removes dissolved heavy metals including lead, mercury, and arsenic. Also controls hydrogen sulfide (rotten egg odor) and inhibits bacteria and algae growth within the filter bed, which extends service life compared to carbon-only cartridges.
• GAC (Granular Activated Carbon): Adsorbs chlorine taste and odor, volatile organic compounds (VOCs), disinfection byproducts such as trihalomethanes (THMs), and trace pesticide residues. The KDF upstream extends GAC life by reducing the chlorine load before water reaches the carbon bed.
• Poly Phosphate: A sequestering agent that coats pipe walls and fitting surfaces with a thin protective film. This film slows scale buildup from hard water minerals and reduces corrosion in metal plumbing. Protects water heaters, RO membranes, and downstream equipment from mineral fouling and pitting.

Compatibility and Sizing

The cartridge uses a standard 10″ x 2.5″ form factor and fits most residential filter housings sold under any brand. It works as a prefilter stage ahead of an RO system, as a replacement carbon stage in an existing multi-stage setup, or as a point-of-entry filter on the main water line. No housing modification needed.

Replacement Schedule

Replace every 6 to 12 months under normal residential use. High-chlorine municipal water or heavy flow volume will shorten service life toward the 6-month end. Replace sooner if you notice reduced flow rate at the outlet, chlorine taste or odor returning to treated water, or visible discoloration of the cartridge when removed.