Pentair 2" Bulkhead O-ring

The Pentair 2" Bulkhead O-Ring (part number 152223 or 190012Z depending on the exact filter line) is a heavy-duty sealing component engineered for a wide variety of Pentair pool and spa filtration systems, including the Triton II and Triton C sand filters, as well as high-capacity Clean & Clear Plus cartridge, FNS Plus, and Quad D.E. filters. Molded from a premium, high-density synthetic nitrile (Buna-N) rubber, this thick circular gasket is designed to fit precisely over the 2-inch threaded bulkhead fittings that penetrate the lower filter tank wall. Its primary structural role is to establish an absolute airtight and watertight compression boundary between the rigid PVC plumbing connectors and the molded fiberglass or composite filter shell, allowing the system to safely contain high-velocity hydraulic water flows and operating pressures up to 50 PSI without weeping or leaking. Built to maintain its shape memory, resist compression set, and withstand constant exposure to concentrated pool sanitizers like chlorine, bromine, and seasonal acid washes, this durable seal is vital for preventing external pressure loss. Given its streamlined, flexible elastomer composition, this individual 2-inch bulkhead O-ring is exceptionally lightweight, carrying a nominal product and shipping weight of approximately 0.03 pounds (about 0.48 ounces).