The ZeroWaste (R) 4 stage reverse osmosis system returns the unused brine water from the RO system back into the home's hot water supply. It conserves water, increases membrane production to provide a faster fill rate of the storage tank, and eliminates air-gap noise by removing the need for an air-gap faucet. The systems reduce particles in the water down to the molecular level, the same process used by major bottled water companies. The process of reverse osmosis reduces salts and other impurities, giving high quality, clear, and great tasting water. The ZeroWaste (R) RO system uses 4 stages of filtration; a 5 micron sediment traps particles like dirt, silt and rust; a 5 micron carbon reduces chlorine, and chemicals that cause bad taste and odor; 24 GPD membrane removes TDS, and contaminants such as arsenic, copper, lead and cysts; a granular activated carbon inline to remove any remaining chlorine or other chemicals that cause bad taste or odor before being dispensed. Color: White.