{"product_id":"mueller-industries-521-398-black-iron-reducing-coupling-2-5x2in-fip","title":"Mueller Industries 521-398 Black Iron Reducing Coupling 2.5x2in Fip","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe MUELLER INDUSTRIES 521-398 is a black iron reducing coupling designed to connect two female-threaded pipes of differing diameters within gas, fuel, and industrial piping systems. Built from black iron, this fitting transitions from a 2.5-inch FIP inlet to a 2-inch FIP outlet and measures 3.6 inches in length. It is suited for use by licensed plumbers, pipefitters, and HVAC technicians working on systems that carry LP gas, natural gas, lubricants, oils, or greases. This fitting is not rated or approved for potable water service.\u003c\/p\u003e\n\u003cp\u003eThis reducing coupling sees common use in residential and light commercial gas distribution lines, oil transfer systems, and industrial lubrication piping. The FIP-to-FIP configuration allows it to thread directly onto male-ended pipe or nipples on both the inlet and outlet sides, making it a straightforward component in reducer installations where a pipe run steps down from 2.5 inches to 2 inches.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eReduces from 2.5-inch FIP inlet to 2-inch FIP outlet in a single fitting\u003c\/li\u003e\n  \u003cli\u003eBlack iron construction suitable for gas, oil, grease, and LP fuel service\u003c\/li\u003e\n  \u003cli\u003eFemale threaded on both ends for direct connection to male-threaded pipe or nipples\u003c\/li\u003e\n  \u003cli\u003eOverall length of 3.6 inches keeps the fitting compact in tight runs\u003c\/li\u003e\n  \u003cli\u003eNot approved for potable water applications\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OEM-style black iron fitting for use in gas, fuel, lubricant, and oil piping systems requiring a female-threaded reducer from 2.5 inches to 2 inches.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation should be performed by a licensed plumber or pipefitter in accordance with applicable local codes and IFGC requirements. Shut off gas or fluid supply and depressurize the line completely before removing or installing any fitting. Apply an approved thread sealant or PTFE tape rated for gas service to all male threads before assembly. Do not use this fitting in potable water lines.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInlet Diameter\u003c\/strong\u003e: 2.5 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInlet Connection\u003c\/strong\u003e: FIP (Female Iron Pipe)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOutlet Diameter\u003c\/strong\u003e: 2 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOutlet Connection\u003c\/strong\u003e: FIP (Female Iron Pipe)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eProduct Length\u003c\/strong\u003e: 3.6 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Black Iron\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eStandard Information\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: MUELLER INDUSTRIES\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 521-398\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"MUELLER INDUSTRIES","offers":[{"title":"Default Title","offer_id":51467639423282,"sku":"521-398","price":36.39,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/313946907.jpg?v=1783909048","url":"https:\/\/voomisupply.com\/products\/mueller-industries-521-398-black-iron-reducing-coupling-2-5x2in-fip","provider":"Voomi Supply","version":"1.0","type":"link"}