{"product_id":"sigma-813508611-ground-joint-pipe-union-1-in-fnpt-150-lb","title":"Sigma 813508611 Ground Joint Pipe Union 1 in Fnpt 150 Lb","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe SIGMA 813508611 is a FIG 3463 ground joint pipe union rated for 150 lb service in a 1-inch nominal pipe size. It features female national pipe taper (FNPT) end connections on both sides and is manufactured from galvanized malleable iron, providing corrosion resistance suitable for a range of piping applications. The ground joint design creates a metal-to-metal seat that delivers a reliable, leak-resistant connection without relying solely on threaded engagement. Licensed plumbers and pipefitters install this fitting in threaded piping systems where periodic disassembly is required for maintenance or service access.\u003c\/p\u003e\n\u003cp\u003eThis union is suited for use in residential and light commercial plumbing, hydronic heating, steam distribution, and general industrial piping systems operating within the 150 lb pressure class. The galvanized finish extends service life in environments where moisture exposure is a concern. The FNPT thread pattern conforms to standard NPT dimensions, making it compatible with standard threaded pipe and fittings throughout a system.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eGround joint metal-to-metal seat for a secure, leak-resistant threaded connection\u003c\/li\u003e\n  \u003cli\u003e1-inch nominal pipe size with FNPT end connections on both sides\u003c\/li\u003e\n  \u003cli\u003e150 lb pressure class rating for general service piping applications\u003c\/li\u003e\n  \u003cli\u003eMalleable iron construction provides strength and impact resistance\u003c\/li\u003e\n  \u003cli\u003eGalvanized finish for added corrosion protection in moisture-prone environments\u003c\/li\u003e\n  \u003cli\u003eAllows pipe system disassembly without cutting or threading new pipe\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 standard 1-inch NPT threaded piping systems operating within the 150 lb pressure class.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation of this union should be performed by a licensed plumber or pipefitter in accordance with applicable local plumbing codes and the International Plumbing Code (IPC). Shut off and depressurize the piping system completely before removing or installing any union fitting. Apply an appropriate thread sealant or PTFE tape to all male threaded connections before assembly. Do not over-tighten the union nut, as this can damage the ground joint seat and compromise the seal.\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 Pipe Size\u003c\/strong\u003e: 1 inch\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEnd Style\u003c\/strong\u003e: FNPT (Female National Pipe Taper)\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: 813508611\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SIGMA","offers":[{"title":"Default Title","offer_id":51525464457522,"sku":"GALU1I-LF","price":14.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/0211824fb5b74af7a4106487a55dca8e_7ac7197d-c97c-4e40-8ba6-13d343bf7e63.jpg?v=1785474583","url":"https:\/\/voomisupply.com\/products\/sigma-813508611-ground-joint-pipe-union-1-in-fnpt-150-lb","provider":"Voomi Supply","version":"1.0","type":"link"}