{"product_id":"sigma-811081009-pipe-coupling-1-1-2-in-fnpt-150-lb-galvanized","title":"Sigma 811081009 Pipe Coupling 1-1\/2 in Fnpt 150 Lb Galvanized","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe SIGMA 811081009 is a FIG 3121 full-coupling fitting designed for threaded pipe connections in plumbing, HVAC, and light industrial piping systems. Built from galvanized malleable iron, this coupling accepts a 1-1\/2 inch nominal pipe size with female NPT (FNPT) threads on both ends. The 150 lb pressure class rating makes it appropriate for low-pressure steam, water, and gas distribution lines. Licensed plumbers and pipefitters install this type of fitting as a straight connector between two threaded pipe sections. The galvanized finish provides corrosion resistance in exposed or damp environments.\u003c\/p\u003e\n\u003cp\u003eThis coupling is suited for residential and commercial piping installations where a threaded inline connection is required. Typical applications include water distribution, hydronic heating supply and return lines, compressed air systems, and natural gas branch lines within rated pressure limits. The FNPT end style on both sides allows direct threading onto standard NPT-threaded pipe or nipples without adapters.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eFIG 3121 full coupling profile with FNPT threads on both ends\u003c\/li\u003e\n  \u003cli\u003e1-1\/2 inch nominal pipe size for standard threaded pipe connections\u003c\/li\u003e\n  \u003cli\u003e150 lb pressure class rating suitable for low-pressure water, steam, and gas service\u003c\/li\u003e\n  \u003cli\u003eMalleable iron construction for strength and resistance to impact in threaded assemblies\u003c\/li\u003e\n  \u003cli\u003eGalvanized finish for corrosion resistance in wet or exposed installations\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OEM-style threaded fitting for use with standard 1-1\/2 inch NPT-threaded pipe in malleable iron piping systems rated to 150 lb service class.\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 IPC or IFGC code requirements for the service type. Shut off and depressurize the line completely before disassembly or fitting installation. Apply an appropriate thread sealant or PTFE tape to male threads before assembly, and tighten to hand-tight plus the number of turns appropriate for the pipe size per standard practice. Do not over-torque malleable iron fittings, as the material can crack under excessive force.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFigure Number\u003c\/strong\u003e: FIG 3121\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNominal Pipe Size\u003c\/strong\u003e: 1-1\/2 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEnd Style\u003c\/strong\u003e: FNPT (Female National Pipe Thread) both ends\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePressure Class\u003c\/strong\u003e: 150 lb\u003c\/li\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\u003c\/ul\u003e\n\u003ch4\u003eStandard Information\u003c\/h4\u003e\n\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: 811081009\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SIGMA","offers":[{"title":"Default Title","offer_id":51524448256306,"sku":"GALCOUP112I-LF","price":14.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/c6a7f4f8199367590c1f454891c461c1_83febe98-a1bf-4f17-b683-b6295792b769.jpg?v=1785449402","url":"https:\/\/voomisupply.com\/products\/sigma-811081009-pipe-coupling-1-1-2-in-fnpt-150-lb-galvanized","provider":"Voomi Supply","version":"1.0","type":"link"}