{"product_id":"sigma-811087618-reducing-coupling-1-1-4x1-in-fnpt-150lb","title":"Sigma 811087618 Reducing Coupling 1-1\/4x1 in Fnpt 150lb","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe SIGMA 811087618 is a malleable iron reducing coupling designed for threaded pipe systems in plumbing, HVAC, and industrial piping applications. This FIG 3121R-pattern fitting connects pipes of two different diameters using female NPT (FNPT) threads on both ends, rated at 150 lb working pressure. The galvanized finish provides corrosion resistance for use in wet or moderately corrosive environments. At 1-1\/4 x 1 inch nominal size, it is a standard trade size used to step down pipe diameter within a run. Licensed plumbers and pipefitters are the primary installers of this fitting in both new construction and retrofit work.\u003c\/p\u003e\u003cp\u003eThis reducing coupling is suited for residential and light commercial piping systems where a diameter reduction is needed inline without changing flow direction. Typical applications include water supply lines, gas distribution piping, compressed air systems, and general industrial fluid handling. The FNPT end style accepts standard tapered pipe threads on both ends, making it compatible with common black iron, galvanized steel, and brass pipe and fittings in 150 lb service.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eMalleable iron construction for strength and machinability in threaded applications\u003c\/li\u003e\n\u003cli\u003eGalvanized finish resists corrosion in wet and outdoor-adjacent environments\u003c\/li\u003e\n\u003cli\u003eFNPT threads on both ends accept standard tapered pipe threads\u003c\/li\u003e\n\u003cli\u003e150 lb pressure rating suitable for water, gas, and air service in typical trade applications\u003c\/li\u003e\n\u003cli\u003eFIG 3121R pattern conforms to standard reducing coupling dimensions\u003c\/li\u003e\n\u003cli\u003e1-1\/4 x 1 inch nominal sizing for common inline pipe reduction\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-style replacement and standard trade fitting for 150 lb malleable iron threaded piping systems using 1-1\/4 inch and 1 inch nominal pipe sizes with NPT threads.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation should be performed by a licensed plumber or pipefitter in accordance with applicable plumbing and mechanical codes such as the IPC or IFGC. Shut off and depressurize the pipe system completely before removing any existing fittings or installing this coupling. Apply an appropriate thread sealant or PTFE tape to the male pipe threads before assembly and tighten to a firm, wrench-tight connection. Do not over-torque, as malleable iron threads can crack under excessive force.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Malleable Iron\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinish\u003c\/strong\u003e: Galvanized\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnd Style\u003c\/strong\u003e: FNPT (Female National Pipe Taper) both ends\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNominal Size\u003c\/strong\u003e: 1-1\/4 x 1 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePressure Rating\u003c\/strong\u003e: 150 lb\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFigure Pattern\u003c\/strong\u003e: FIG 3121R\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eStandard Information\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: SIGMA\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 811087618\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SIGMA","offers":[{"title":"Default Title","offer_id":51525320474930,"sku":"GALRED1141I-LF","price":14.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/f0eabc50583c61a419da8ef4f53862fd_d1c219e5-455b-4d9d-89a6-84038dc174d9.jpg?v=1785470487","url":"https:\/\/voomisupply.com\/products\/sigma-811087618-reducing-coupling-1-1-4x1-in-fnpt-150lb","provider":"Voomi Supply","version":"1.0","type":"link"}