{"product_id":"sigma-811080811-malleable-iron-pipe-coupling-1-1-4-in-fnpt-150-lb","title":"Sigma 811080811 Malleable Iron Pipe Coupling 1-1\/4 in Fnpt 150 Lb","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe SIGMA 811080811 is a malleable iron pipe coupling designed to join two sections of pipe in threaded piping systems. Built to a 150 lb pressure rating, this FIG 3121 fitting uses female NPT (FNPT) threads on both ends to create a secure, inline connection. The galvanized finish provides corrosion resistance for use in demanding mechanical and plumbing environments. At 1-1\/4 inch nominal size, this coupling fits standard pipe dimensions and is sized for commercial and light industrial applications. Licensed plumbers and pipefitters rely on this type of fitting for gas, water, and general mechanical piping systems where a durable threaded connection is required.\u003c\/p\u003e\u003cp\u003eThis coupling is suited for residential and commercial plumbing, HVAC hydronic piping, fire protection rough-in, and general mechanical piping installations. The 1-1\/4 inch nominal size is a common diameter in branch and main supply lines across a wide range of building systems. The FNPT thread style conforms to standard NPT thread specifications, making it compatible with schedule 40 and schedule 80 threaded pipe applications where a full-coupling inline connection is needed.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e150 lb pressure rating suitable for standard-service threaded piping systems\u003c\/li\u003e\n\u003cli\u003eFNPT threads on both ends for inline pipe joining\u003c\/li\u003e\n\u003cli\u003eMalleable iron construction provides strength and resistance to mechanical stress\u003c\/li\u003e\n\u003cli\u003eGalvanized finish resists corrosion in wet and humid environments\u003c\/li\u003e\n\u003cli\u003e1-1\/4 inch nominal size fits standard NPT-threaded pipe\u003c\/li\u003e\n\u003cli\u003eFIG 3121 pattern for consistent fitment with standard coupling dimensions\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-style replacement or new-installation fitting for standard 1-1\/4 inch NPT threaded piping systems in plumbing, HVAC, and mechanical applications.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation should be performed by a licensed plumber or pipefitter in accordance with applicable local plumbing codes and IFGC or IPC requirements. Apply an appropriate thread sealant or PTFE tape to the male threads before assembly. Hand-tighten first, then use a pipe wrench to achieve proper thread engagement without over-torquing the fitting. Shut off and depressurize the piping system completely before removing or installing any threaded fittings.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eNominal Size\u003c\/strong\u003e: 1-1\/4 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 Rating\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\u003cli\u003e\n\u003cstrong\u003eFigure Number\u003c\/strong\u003e: FIG 3121\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: 811080811\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SIGMA","offers":[{"title":"Default Title","offer_id":51525118034226,"sku":"GALCOUP114I-LF","price":14.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/c6a7f4f8199367590c1f454891c461c1_31581587-91ac-4092-9d53-7cda9cb7c3a2.jpg?v=1785464905","url":"https:\/\/voomisupply.com\/products\/sigma-811080811-malleable-iron-pipe-coupling-1-1-4-in-fnpt-150-lb","provider":"Voomi Supply","version":"1.0","type":"link"}