Waterway Poly Jet Internal [4 3 16" FD] [Roto] [Deluxe Scallop] [White] (210 6190) vacalert A gate valve in this A gate valve in this configuration is useful because it provides line isolation while matching plumbing layouts that are built specifically around spigot fit valve ends The single pump configuration gives this panel practical value because not every spa requires a multi pump interface An internal like this is useful because it combines a larger visible trim format with an active user facing jet pattern that helps restore the original feel of the assembly while the roto action maintains the performance character that many users expect from this style of jet