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. Installation is easier than ever with the EZ Anchor mounting assembly. Secure the faucet from above with no need to go below the deck. Mounts the faucet tightly to the deck, helping prevent the faucet from loosening over time. Easily installs on decks up to 2-1/2 In. thick, like granite or quartz. Whether you re a first timer just learning how to install a faucet or a seasoned installation professional who s done it a dozen times, save your back and your knees with the EZ Anchor mounting assembly. 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.