The Orbit 57183 underground 3 port manifold for an Orbit underground sprinkler system is very user-friendly for the do-it-yourself homeowner. You don't need any tools to install it, so this is the easiest way to install a 3-valve manifold for your irrigation system. Features and Benefits: Made from a durable UV-resistant polymer and high impact construction, this sprinkler system manifold is built for reliability, O-rings are placed at each connection ensuring a watertight connection througho...