{"product_id":"pentair-nautilus-ns-tank-o-ring","title":"Pentair Nautilus NS Tank O-ring","description":"\u003cp data-path-to-node=\"0\"\u003eThe Pentair Nautilus NS Tank O-Ring (part number 152127, cross-referenced as the industry standard O-184 profile) is a specialized, heavy-duty pressure-sealing gasket engineered exclusively for the main structural body clamp assembly of legacy Pentair and Pac-Fab Nautilus series high-capacity Diatomaceous Earth (D.E.) pool and spa filtration systems. This specific elastomeric ring is standard hardware tailored exactly to fit the 18-inch diameter stainless steel tank hulls utilized across the classic Nautilus series, including the NS24, NS36, NS48, NS60, and NS72 filtration vessels.\u003c\/p\u003e\n\u003cp data-path-to-node=\"1\"\u003eInjection-molded from a heavy-walled, high-density, and chemically inert synthetic rubber polymer, this large-diameter O-ring features a thick circular cross-section measuring approximately 18 inches inside diameter and 7\/16-inch (\u003cspan class=\"math-inline\" data-math='0.4375\"' data-index-in-node=\"231\"\u003e$0.4375\"$\u003c\/span\u003e) in structural thickness. Its primary operational role is to sit nestled within the machined sealing flange located around the center perimeter of the split-tank chassis. When the upper stainless steel tank dome is lowered onto the lower basin and clamped tightly by the single-bolt structural tension band, the O-ring compresses uniformly. This establishes an absolute watertight and airtight compression boundary, ensuring the high-pressure filtration vessel can safely contain its internal fluid volume and sustain continuous system operating pressures up to 50 PSI without weeping, leaking, or blowing out under severe pump startup surges.\u003c\/p\u003e\n\u003cp data-path-to-node=\"2\"\u003eEngineered to endure a long operational lifespan completely submerged in a dynamic, chemical-rich environment, its robust rubber matrix is optimized to resist dynamic compression set, material flattening, stretching, and brittleness. It withstands decades of intense equipment pad weathering, direct exposure to pool chemistry, and corrosive degradation from concentrated sanitizers like chlorine, bromine, and winterizing acid washes. Due to its large, 18-inch flexible circular profile and heavy-gauge thickness, this individual replacement tank body O-ring carries a net product and shipping weight of approximately \u003cb data-path-to-node=\"2\" data-index-in-node=\"619\"\u003e0.10 to 0.25 pounds\u003c\/b\u003e (about 1.6 to 4.0 ounces).\u003c\/p\u003e","brand":"Commercial Pool and Spa Supplies","offers":[{"title":"Default Title","offer_id":53416219803759,"sku":"152127","price":108.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0678\/3785\/3807\/files\/51OH0e3H7JL._AC_UF894_1000_QL80_50226784-25a5-45f5-a4f4-5295044cc472.jpg?v=1782746053","url":"https:\/\/commercialpoolandspasupplies.com\/products\/pentair-nautilus-ns-tank-o-ring","provider":"Commercial Pool and Spa Supplies ","version":"1.0","type":"link"}