Pentair 272550 Sight Glass with Vacuum Projector Replacement Hi-Flow Pool and Spa MultiPort Valve Sight glass replacement Fits Pentair Six-Way 1-1/2-inch HiFlow pool and spa multiport valves Also fits Pentair HiFlow top and side mount pool/spa multiport valves Includes vacuum projector Measures 1-inch length by 1-inch height by 1-1/2-inch width