POLYPROPYLENE Generally used for sediment filtration. High chemical resistance is ideal for reverse osmosis prefiltration. Surfacant-, adhesive-, and binder-free. Thermal-Bond Traps particles on the surface of the filtration medium. Excellent dirt-holding capacity and chemical resistance. Can be pleated to maximize surface area.

Polypropylene/Cellulose More economical than pure polypropylene filtration, but the cellulose is less bacteria-resistant. Can be pleated to maximize surface area. Melt-Blown/Spun-Bonded Depth-filtration material traps particles inside the medium and provides greater holding capacity than surface-filtration materials.

CARBON Granular Graded-density medium has low sediment-removal capacity, but fairly high adsorptive properties. Fiber Coconut shell carbon has excellent mechanical and physical filtration properties, as well as outstanding adsorptive properties.

Block Coconut shell blocks offer limited dirt-holding capacity, but have excellent adsorptive properties for chlorine and chloramine taste and odor removal.