Home Master TMHP HydroPerfection Undersink Reverse Osmosis Water Filter System A better RO system -- Home Master HydroPerfection's innovative design solves the most common problems associated with traditional RO systems Highly pure water -- advanced filtration and purification stages remove 98 percent of iron, chemicals, heavy metals, sediment, and other contaminants Added Minerals For Great Taste -- its patented Full Contact technology adds calcium and magnesium minerals twice during the purification process. Advanced long lasting filters  2,000 gallons or 1 year between filter changes. Purification unit - 16 Inch H x 8 Inch W x 5 Inch D. Reserve tank - 15 Inch H x 11 Inch D Well or City Water -- included IRON prefilter protects RO membrane, UV filter destroys microorganisms, Permeate Pump maximizes limited water pressure Long lasting and easy-to-change filters -- change only once a year or 2000 gallons; filter changes are quick and painless, no wrenches required