{"product_id":"oem-lennox-1-2-npt-backflow-preventer-boiler-fill-valve-combo-x6458","title":"OEM Lennox 1\/2\" NPT Backflow Preventer \u0026 Boiler Fill Valve Combo — X6458","description":"\u003cp\u003eThe \u003cstrong\u003eLennox X6458\u003c\/strong\u003e is a genuine OEM FM911\/U combination assembly that integrates a 1\/2-inch NPT threaded backflow preventer and boiler fill valve, designed to maintain proper system water pressure while protecting the potable water supply from contamination in Lennox boiler systems. Symptoms of failure include inability to maintain boiler water pressure, continuous pressure loss, or potential backflow of system water into the supply line. This direct OEM replacement assembly installs easily with standard 1\/2-inch NPT threaded connections and meets Lennox quality standards for safe, long-term operation.\u003c\/p\u003e","brand":"Lennox","offers":[{"title":"Default Title","offer_id":63081017639283,"sku":"LNX-X6458","price":59.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-lennox-1-2-npt-backflow-preventer-boiler-fill-valve-combo-x6458","provider":"National HVAC Parts","version":"1.0","type":"link"}