Pentair 11 1/4" Lower Pipe Assembly for Triton C TR140C Sand Filter

The Pentair 11 1/4" Lower Pipe Assembly (part number 152228 or 154528) is a specialized internal plumbing component engineered exclusively for the heavy-duty Pentair Triton C and Triton C-3 commercial TR140C side-mount sand filtration systems. Injection-molded from a thick-walled, high-impact PVC composite, this rigid 11.25-inch pipe serves as a vital section of the lower underdrain manifold, connecting the central collector hub directly to the main bulkhead fittings of the fiberglass tank shell. Its primary structural role is to channel high-velocity, fully filtered water out of the sand media bed and transport it safely into the return lines, while simultaneously bearing the intense downward structural load of thousands of pounds of wet silica sand or glass media. Built to withstand continuous commercial hydraulic pressures, turbulent backwashing forces, and relentless exposure to corrosive pool sanitizers like chlorine and acid, this pipe ensures a seamless, leak-free transition inside the pressurized tank. Despite its robust, pressure-rated design engineered for high-flow commercial environments, this compact internal pipe assembly remains easy to handle for field technicians, carrying an individual product and shipping weight of approximately 0.85 pounds (about 13.6 ounces).