{"product_id":"sigma-811080209-fig-3121-galvanized-pipe-coupling-1-2-in-fnpt","title":"Sigma 811080209 Fig 3121 Galvanized Pipe Coupling 1\/2 in Fnpt","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe SIGMA 811080209 is a FIG 3121 malleable iron pipe coupling with a galvanized finish, designed for joining two threaded pipe sections in a straight run. Rated at 150 lb, this fitting accepts female NPT (FNPT) connections on both ends and is sized for 1\/2 inch nominal pipe. The galvanized coating provides corrosion resistance in exposed or moderately harsh service environments. Plumbers and pipefitters install this type of coupling in water supply, gas distribution, and general industrial piping systems where a reliable, pressure-rated threaded connection is required.\u003c\/p\u003e\u003cp\u003eThis coupling is suited for residential and light commercial plumbing and gas piping applications. It is commonly installed in pipe runs that require a full-thread union of two pipe ends without change in direction or pipe size. The FNPT end style is compatible with standard NPT-threaded pipe and fittings. The 150 lb pressure class makes it appropriate for low- to medium-pressure service lines where malleable iron fittings are specified.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eFIG 3121 straight coupling configuration for in-line pipe joining\u003c\/li\u003e\n\u003cli\u003eFNPT connections on both ends accept standard NPT-threaded pipe\u003c\/li\u003e\n\u003cli\u003e150 lb pressure rating suitable for low- to medium-pressure systems\u003c\/li\u003e\n\u003cli\u003eMalleable iron construction provides strength and impact resistance\u003c\/li\u003e\n\u003cli\u003eGalvanized finish adds corrosion protection for exposed installations\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-style replacement or standard trade fitting for 1\/2 inch nominal NPT-threaded pipe systems using 150 lb malleable iron fittings.\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 codes, the International Plumbing Code (IPC), or the International Fuel Gas Code (IFGC) where applicable. Shut off and depressurize the pipe system completely before removing or installing any threaded fittings. Apply an appropriate thread sealant or PTFE tape to the male threads before assembly and tighten to hand-tight plus the appropriate number of turns for the pipe size per standard trade practice. Do not overtighten malleable iron fittings, as cracking can occur.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\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\/2 inch\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\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: 811080209\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SIGMA","offers":[{"title":"Default Title","offer_id":51524863033650,"sku":"GALCOUP12I-LF","price":14.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/c6a7f4f8199367590c1f454891c461c1_a914bf2b-edee-4ebb-b714-3a34e6265fc7.jpg?v=1785459939","url":"https:\/\/voomisupply.com\/products\/sigma-811080209-fig-3121-galvanized-pipe-coupling-1-2-in-fnpt","provider":"Voomi Supply","version":"1.0","type":"link"}