Provides 4 500 gallons @ .75 gpm (10") or 9 000 gallons @ 1.5 gpm (20") Superior sediment taste/odor and chlorine reduction. Listed at NSF Standard 42 Class I. Perfect for beverage systems with a medium sized brewer (up to 50 lbs. of coffee/week). Effective 10 micron graded density filtration. Provides six months of scale reduction and protects equipment from corrosion. Has easy water shut-off valve built into manifold plus the clear housing makes it easy to see cartridges. Designed for minimum purge after cartridge charge. Single purpose cartridges also available for treatment of problems with taste and odor (T) lime scale (L) hardness (H) and sediment filtration (S).