Pentair 2" Multiport Valve Sight Glass

The Pentair 2" Multiport Valve Sight Glass (Product #: 154566Z / 272550) is a factory-original OEM observation component engineered to provide clear visual inspection of fluid clarity during backwash and rinse cycles. Designed for use on high-capacity Pentair, PacFab, and Sta-Rite® 2-inch Hi-Flow™ side-mount and top-mount six-position multiport valves—commonly paired with Triton® II, Tagelus®, and FNS® Plus filtration systems—this threaded window installs directly into the valve body's dedicated waste port. Injection-molded from a premium, thick-walled polycarconate or acrylic crystal polymer, the component features exceptional clarity, complete resistance to chemical degradation from high chlorine or bromine concentrations, and robust UV stabilizers to prevent clouding, yellowing, or cracking under constant outdoor weathering and high-temperature pump pad environments. By allowing pool service technicians and homeowners to monitor the turbidity of effluent water in real time, it ensures the backwash process is run only until the water flows completely clear, effectively preventing unnecessary water loss and optimizing chemical balances. Built with heavy-duty male threads and paired with a high-density rubber gasket, it establishes a reliable compression seal that withstands system backpressure surges up to 50 PSI. The physical dry weight of this single Pentair 2" Multiport Valve Sight Glass is approximately 0.10 pounds (roughly 1.6 ounces, with a packaged shipping weight of approximately 0.25 pounds), providing an incredibly lightweight, durable, and vital indicator for efficient and precise pool water maintenance.