Pentair Threaded Drain Cap

The Pentair Threaded Drain Cap (part number 154697) is a crucial heavy-duty closure component engineered specifically for the lower drain and winterization ports of Pentair Triton and Triton II side-mount pool and spa sand filters. Injection-molded from a rigid, high-density black thermoplastic compound, this cap features specialized female threads that spin tightly onto the 1.5-inch male drain spigot located at the base of the fiberglass tank shell. When paired with its coordinating internal gasket, it forms an absolute watertight and airtight compression seal capable of holding back massive hydraulic forces and preventing water or fine filter media leaks during standard pump cycles. Designed with heavy external structural ridges, it gives pool service technicians the necessary manual leverage to install or remove the cap by hand during seasonal system maintenance or cold-weather winterization drainage. Built to withstand continuous outdoor UV weathering, freezing temperatures, and corrosive pool sanitizers, this durable hardware accessory remains exceptionally compact, carrying an individual product and shipping weight of approximately 0.10 pounds (about 1.6 ounces).