{"product_id":"pentair-24-sqft-fns-plus-standpipe-outlet-assembly","title":"Pentair 24 SqFt FNS Plus Standpipe Outlet Assembly","description":"\u003cp data-path-to-node=\"0\"\u003eThe Pentair 24 SqFt FNS Plus Standpipe Outlet Assembly (part number 190034) is a critical internal fluid-distribution component engineered exclusively for the pressurized grid chamber of low-to-mid capacity pool and spa Diatomaceous Earth (D.E.) filtration systems. This structural PVC pipe installation is standard hardware for the Pentair FNS Plus 24-square-foot filter model (FNSP24), where it serves as the central plumbing anchor for the internal grid matrix. Injection-molded from a heavy-walled, high-impact, and chemically inert polymer compound, this compact standpipe assembly measures 4-3\/8 inches in height. Its primary operational role is to establish a secure, bottom-mounted return channel within the filter shell, seating directly into the lower bulkhead and rising up through the center of the vertical filter grids to act as the final extraction point for clear, purified water.\u003c\/p\u003e\n\u003cp data-path-to-node=\"1\"\u003eDuring the standard pool filtration cycle, water passes through the fabric-wrapped grid elements coated in D.E. powder, leaving behind micron-sized debris. This clean, pressurized water collects at the top manifold before flowing downward through the hollow, unyielding chamber of this standpipe, out the bottom tank bulkhead, and back to the pool return plumbing. Conversely, during backwash flow reversals, it directs turbulent, high-velocity incoming water to assist in purging spent D.E. media away from the grid elements. This robust construction enables the internal plumbing core to safely handle continuous system operating pressures up to 50 PSI without hairline cracking, joint weeping, or experiencing stress-induced detachment under extreme pump vibration surges. Designed to remain permanently submerged in a dynamic, chemical-rich aquatic framework, its durable plastic matrix completely resists material brittleness, structural warping, and corrosive breakdown from exposure to high-strength pool sanitizers like chlorine, bromine, and routine winterizing acid washes. Due to its short, rigid, thick-walled cylindrical geometry and integrated sealing seat, this individual replacement standpipe assembly carries a net product and shipping weight of approximately \u003cb data-path-to-node=\"1\" data-index-in-node=\"1278\"\u003e0.75 to 1.10 pounds\u003c\/b\u003e (about 12.0 to 17.6 ounces).\u003c\/p\u003e","brand":"Commercial Pool and Spa Supplies","offers":[{"title":"Default Title","offer_id":53416228192367,"sku":"190034","price":106.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0678\/3785\/3807\/files\/154010_7cd1d58f-7004-4a03-b2df-e31c769378ab.webp?v=1782746226","url":"https:\/\/commercialpoolandspasupplies.com\/products\/pentair-24-sqft-fns-plus-standpipe-outlet-assembly","provider":"Commercial Pool and Spa Supplies ","version":"1.0","type":"link"}