Pentair 2.25" x .25" Drain Plug O-Ring

The Pentair 2.25" x .25" Drain Plug O-Ring (part number 192323, also cross-referenced with various pool pump and filter drain plug configurations) is a heavy-duty elastomeric sealing component designed for high-pressure pool and spa filtration systems, commercial skimmers, and centrifugal pumps. Molded from a premium, high-density synthetic nitrile (Buna-N) rubber, this thick circular gasket features a 2.25-inch internal diameter and a robust 1/4-inch cross-sectional thickness. Its primary structural role is to seat securely within the deep machined perimeter channel of a large-diameter male-threaded drain plug or winterizing spigot assembly at the base of the equipment chassis. When the plug is tightened into place, this thick ring compresses uniformly to establish an absolute airtight and watertight pressure boundary, effectively preventing high-velocity water leaks or slow weeping when the system is operating under continuous hydraulic pressures up to 50 PSI. Engineered to maintain its elastic shape memory and resist flattening or cracking under high mechanical torque, it withstands extreme outdoor UV weathering, severe seasonal temperature shifts, and prolonged contact with harsh sanitizing chemistry like chlorine, bromine, and seasonal acid washes. Due to its streamlined, low-profile elastomer architecture, this durable sealing washer carries an exceptionally lightweight product and shipping weight of approximately 0.03 to 0.05 pounds (about 0.48 to 0.80 ounces).