Delta’s exclusive DIAMOND Seal? Technology uses a valve with a tough diamond coating. InnoFlex? PEX waterways keep water inside the faucet out of contact with potential metal contaminants. This powerful combination brings you a faucet built to last up to five million uses. Delta is committed to supporting water conservation around the globe and has been recognized as WaterSense? Manufacturer Partner of the Year in 2011, 2013, and 2014.