{"product_id":"sigma-34u-1040c-pipe-union-4-inch-fnpt-150-lb-galvanized","title":"Sigma 34U 1040C Pipe Union 4 Inch Fnpt 150 Lb Galvanized","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe SIGMA 34U 1040C is a malleable iron pipe union with a brass seat, designed for threaded piping systems in plumbing, HVAC, and industrial piping applications. At 4 inches nominal size with female NPT (FNPT) end connections, this union allows pipelines to be disconnected and reconnected without rotating adjacent pipe sections. The galvanized finish provides corrosion resistance for use in moderate-exposure environments. Rated at 150 lb pressure class, it is a standard fitting for low-pressure gas, water, and steam distribution systems. Installation is typically handled by licensed plumbers or pipefitters working on commercial or industrial piping runs.\u003c\/p\u003e\n\u003cp\u003eThis union fits into threaded malleable iron piping systems at 4 inches nominal pipe size. Its 150 lb class rating makes it appropriate for residential and light commercial water supply, low-pressure steam, and gas distribution piping where a break-apart connection point is required for serviceability. The FNPT end style is compatible with standard NPT-threaded pipe and fittings. Galvanized finish suits above-ground and exposed indoor installations where moisture contact is a factor.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e4 inch nominal size with FNPT end connections for standard NPT threaded pipe\u003c\/li\u003e\n  \u003cli\u003eBrass seat provides a leak-resistant metal-to-metal sealing surface at the union joint\u003c\/li\u003e\n  \u003cli\u003eMalleable iron body offers strength and durability in threaded piping assemblies\u003c\/li\u003e\n  \u003cli\u003eGalvanized finish adds corrosion resistance for exposed or damp indoor environments\u003c\/li\u003e\n  \u003cli\u003e150 lb pressure class suits low-pressure water, gas, and steam service\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 4 inch nominal NPT threaded malleable iron piping systems rated at 150 lb pressure 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 local codes and the International Plumbing Code (IPC) or International Fuel Gas Code (IFGC) as relevant to the service. Shut off and depressurize the line completely before disassembling or installing any union fitting. Apply an appropriate thread sealant or PTFE tape to the NPT threads before assembly. Do not over-tighten the union nut, as this can damage the brass seat and compromise the seal.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNominal Size\u003c\/strong\u003e: 4 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\u003eBody Material\u003c\/strong\u003e: Malleable Iron\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSeat Material\u003c\/strong\u003e: Brass\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: 34U 1040C\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SIGMA","offers":[{"title":"Default Title","offer_id":51525317755186,"sku":"GALU4I-LF","price":137.21,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/7da9efa31d1f4285accedf1911d136c4.jpg?v=1785470422","url":"https:\/\/voomisupply.com\/products\/sigma-34u-1040c-pipe-union-4-inch-fnpt-150-lb-galvanized","provider":"Voomi Supply","version":"1.0","type":"link"}