{"product_id":"pentair-stainless-steel-back-up-ring","title":"Pentair Stainless Steel Back-up Ring","description":"\u003cdiv class=\"container\"\u003eThe Pentair Stainless Steel Back-up Ring (part number 190059 or 190059Z) is a specialized structural hardware component engineered for high-capacity Pentair D.E. and cartridge filtration systems, including the FNS, FNS Plus, and Clean \u0026amp; Clear Plus series. Stamped from a premium, heavy-gauge stainless steel alloy, this rigid, circular reinforcement ring is designed to sit directly behind the flexible rubber bulkhead O-rings or tank adapter fittings. Its primary structural role is to provide a perfectly flat, unyielding metallic backstop that evenly distributes the intense clamping forces exerted when the bulkhead retaining nuts are torqued down against the composite filter shell. By preventing the rubber seals from extruding, distorting, or shifting under high-velocity hydraulic water flows, this ring ensures an absolute airtight and watertight compression boundary that can safely withstand continuous system operating pressures up to 50 PSI. Built to be completely impervious to rust, oxidation, and chemical degradation from continuous exposure to chlorinated pool water, acid washes, and fluctuating water temperatures, this hardware piece maintains the long-term structural integrity of the tank's lower plumbing ports. Given its dense, low-profile metallic construction, this durable back-up ring carries an individual product and shipping weight of approximately \u003cb data-path-to-node=\"0\" data-index-in-node=\"1381\"\u003e0.18 pounds\u003c\/b\u003e (about 2.88 ounces).\u003cbr\u003e\u003c!----\u003e\n\u003c\/div\u003e","brand":"Commercial Pool and Spa Supplies","offers":[{"title":"Default Title","offer_id":53327094677615,"sku":"195339","price":134.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0678\/3785\/3807\/files\/195339-2-1_x700_8bbb9cea-0277-461a-87fc-c564a09d851b.webp?v=1782229721","url":"https:\/\/commercialpoolandspasupplies.com\/products\/pentair-stainless-steel-back-up-ring","provider":"Commercial Pool and Spa Supplies ","version":"1.0","type":"link"}