Home Master TMAFC Artesian Full Contact Undersink Reverse Osmosis Water Filter System A better RO System - innovative design solves most common problems associated with traditional RO systems. Maximum Sediment: 5 NTU,Maximum total dissolved solids (TDS): 2000 ppm ,Maximum hardness: 10 gpg , Maximum Iron 0.2 ppm and pH limit is 4 - 10 Highly Pure Water - its seven stages of filtration and enhancement remove up to 98 percent of chemicals, including chloramine, and other contaminants. Added minerals for great taste - patented Full Contact technology adds calcium and magnesium minerals twice during the purification process. Long lasting and easy change filters - change only once a year or every 2000 gallons; no wrenches required. Faster flow rate - water flows twice as fast compared to traditional RO systems. Made in USA.