For a regular buyer, selecting a bathroom faucet is usually limited to style elements. We huddle over design manuals and debate about the finish, but are usually less concerned about what goes inside of a faucet. Most of us find the specs difficult to understand, so we just skim over this essential part. In this article, our aim is to simplify the valve construction to enable you to make a well-informed decision. The make of the valve is not only important from the point of view of durability, but it is also essential for hassle-free day-to-day use. Most standard quality faucets are made from brass, plated with chrome or PVD to render them resistant to corrosion. Over the years, faucet technology has moved in the direction of lead-free construction. It is increasingly being replaced by bismuth. It is always better to check the installation manual while purchasing a new faucet. This gives you a good idea about the plumbing essentials and the ease with which the faucet can be installed in your bathroom. The valve controls the flow of water from the faucet making it the most important part of the faucet mechanism. There are four kinds of valves, which can be used in bathroom faucets.