Pentair Sta-Rite® Plastic Slide Valve Index Plate Assembly

The Pentair Sta-Rite® Plastic Slide Valve Index Plate Assembly (Product #: 14821-0004S) is a factory-original OEM replacement hardware module engineered to provide rigid mechanical alignment and multi-position guidance for two-position push-pull pool and spa filtration networks. Explicitly designed to bolt directly over the upper neck of Sta-Rite® 1.5-inch and 2-inch side-mounted plastic slide valves—which are routinely paired with high-capacity System:2™ and System:3® series modular sand and diatomaceous earth (D.E.) separation vessels—this integrated assembly governs the exact manual travel limits of the internal piston shaft. Injection-molded from a thick-walled, ultra-high-impact engineering polymer composite, the structural plate is equipped with precision-molded vertical detents and locking tracks that seat the valve’s exterior lever handle firmly into place, preventing hydraulic pressure surges from causing the internal piston to drift or unseat during operation. This stable positioning eliminates internal fluid cross-contamination and waste line weeping under continuous line pressures up to 50 PSI, ensuring the pool's water column routes flawlessly between standard filtration and high-velocity backwash modes. The rugged, non-corrosive polymer matrix delivers complete immunity to pump room humidity, advanced UV weathering, and concentrated chlorine or salt-chlorine sanitizers without warping, cracking, or stripping its mounting holes over years of service. The physical dry weight of this complete Pentair Sta-Rite Plastic Slide Valve Index Plate Assembly is approximately 0.30 pounds (roughly 4.80 ounces, with a packaged retail shipping weight of 0.50 pounds), providing pool service professionals and DIY homeowners with a vital, exceptionally durable hardware standard for precise filter pad fluid management.