Pentair 1/4" x 5/8" 18-8 Stainless Steel Flat Washer

The Pentair 9-1/8" Replacement Lateral (part number 152202) is a specialized internal filtration component engineered exclusively for the underdrain grid assemblies of high-capacity Pentair Triton II (TR100) side-mount and Tagelus (TA100) top-mount pool and spa sand filters. Injection-molded from a high-impact, chemical-resistant polymer composite, this 9.125-inch slotted tube features a heavy-duty male threaded connector that screws directly into the central collector hub at the very bottom of the filter tank. Its primary functional role is to allow fully clarified water to pass through its precision-engineered micro-slots while creating an absolute barrier that prevents dense silica sand or glass media from escaping into the pool return lines. Built to withstand intense hydraulic pressure up to 50 PSI, forceful backwashing flow reversals, and the immense downward crushing weight of hundreds of pounds of wet filter media, this lateral ensures a balanced and unrestricted water flow across the entire lower bed of the pressure vessel. Because it is a rigid but hollow plastic grid component, it maintains a lightweight profile for easy handling during system overhauls, carrying an individual net product and shipping weight of approximately 0.15 pounds (about 2.4 ounces).