Physical Vapor Deposition processing, better known as PVD, is a manufacturing technique utilized by American Standard to create a durable, long lasting polished brass faucet finish. The process was originally developed to improve the durability of tools and has even been used on NASA's space shuttles. During an intense, high-tech procedure, the finish forms a permanent bond with the faucet, rather than a simple coating over the faucet body. The result is a brass faucet that provides protection from every day wear, corrosion and scratches - even in coastal climates. Faucets manufactured with PVD processing provide enduring beauty and are backed by American Standard's lifetime warranty.