The Everpure inc water heaters cartridge. Large capacity filter for multiple bifurcation or commercial use. garages. The combination of material are designed and micro filter for 0.5 – 2 Micron and larger than impurities in the water of the highest quality yields. Also disinfecting Bacteriostatic effect. Standards are jwwa w – 6, and clear, and NSF standard 42//53. Used filters are used by recovery. Please Use the are sold separately to the QL2, QL3, QC4 head bound? If you need.