Pentair 1‑1/2″ NPT Drain Plug Cap for FNS, Quad, Clean & Clear Plus Filters | 190030Z Pentair 190030Z 1‑1/2″ NPT drain cap for pool filters—durable, leak‑resistant plug for FNS, Quad D.E., and Clean & Clear Plus systems. 1‑1/2″ NPT Threaded Plug: Fits standard 1‑1/2″ female NPT drain ports on compatible Pentair filter systems. Compatible with Popular Series: OEM part designed for use with FNS, Quad D.E., and Clean & Clear Plus filters. Secure Watertight Seal: Prevents leaks and protects plumbing during operation or off-season storage. Heavy-Duty Polymer Construction: Resistant to UV rays, pool chemicals, and temperature fluctuations. Easy to Replace: Twist-lock design allows for fast removal and installation without special tools. This 1‑1/2″ NPT drain plug cap 190030Z is a reliable replacement component for Pentair FNS, Quad D.E., and Clean & Clear Plus pool filter systems. Designed to thread directly into the drain outlet, this cap forms a secure seal that prevents water leakage during operation and protects plumbing during maintenance or winterization. Built from high-strength, chemical-resistant plastic, it stands up to harsh pool conditions, including prolonged sun exposure and chlorinated water. Its precision-molded threading ensures a tight fit with no cross-threading or slipping. Whether you're replacing a worn cap or performing seasonal prep, this plug provides a simple, effective solution to keep your system sealed and running efficiently. An essential maintenance part for pool professionals and DIY owners alike, the 190030Z drain plug cap keeps filtration systems protected, leak-free, and ready for use year-round.