{"product_id":"sigma-813509411-ground-joint-pipe-union-2-1-2-in-150-lb","title":"Sigma 813509411 Ground Joint Pipe Union 2-1\/2 in 150 Lb","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe SIGMA 813509411 is a FIG 3463 ground joint pipe union rated at 150 lb and sized for 2-1\/2 inch nominal pipe. Ground joint unions use a machined brass or iron seat at the center nut to create a leak-resistant metal-to-metal seal, making them a reliable choice for threaded pipe systems that require periodic disassembly. The body is malleable iron with a galvanized finish for corrosion resistance. Both ends are female NPT (FNPT), allowing straightforward connection to standard threaded pipe. Plumbers and pipefitters install this fitting where sections of pipe must be disconnected for service or replacement without cutting.\u003c\/p\u003e\n\u003cp\u003eThis union is suited for residential and commercial plumbing, gas distribution, steam, and general industrial piping applications where 150 lb rated malleable iron fittings are specified. The galvanized finish makes it appropriate for wet or mildly corrosive environments. It is commonly installed in mechanical rooms, boiler rooms, and utility piping runs where routine access to flanged or threaded connections is required.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e150 lb pressure rating for standard service plumbing and gas piping\u003c\/li\u003e\n  \u003cli\u003eGround joint design provides a reliable metal-to-metal seal at the union nut\u003c\/li\u003e\n  \u003cli\u003eMalleable iron construction for durability in threaded piping systems\u003c\/li\u003e\n  \u003cli\u003eGalvanized finish resists corrosion in wet and exposed environments\u003c\/li\u003e\n  \u003cli\u003eFNPT ends on both sides connect to standard NPT-threaded pipe and fittings\u003c\/li\u003e\n  \u003cli\u003e2-1\/2 inch nominal size suitable for larger-diameter piping runs\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OEM-style replacement or new-installation fitting for 2-1\/2 inch nominal NPT threaded pipe systems using 150 lb malleable iron fittings.\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 codes including the IPC and IFGC where gas service is involved. Depressurize and drain the pipe system fully before disassembly or installation. Apply thread sealant or PTFE tape to all NPT threads before assembly. Tighten the union nut to a snug, wrench-tight fit at the ground joint seat — do not overtighten, as this can damage the seating surface.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFigure Number\u003c\/strong\u003e: FIG 3463\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNominal Size\u003c\/strong\u003e: 2-1\/2 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEnd Style\u003c\/strong\u003e: FNPT (Female National Pipe Thread)\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\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: 813509411\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SIGMA","offers":[{"title":"Default Title","offer_id":51525279351090,"sku":"GALU212I-LF","price":52.95,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/e78c6426e972071a3f13ccf13bebe905_bd34f879-4e6c-49c5-ac92-716d18ed906e.jpg?v=1785469358","url":"https:\/\/voomisupply.com\/products\/sigma-813509411-ground-joint-pipe-union-2-1-2-in-150-lb","provider":"Voomi Supply","version":"1.0","type":"link"}