{"product_id":"sigma-blcoup3i-lf-3-inch-black-imi-coupling","title":"Sigma BLCOUP3I-LF 3 Inch Black Imi Coupling","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe SIGMA BLCOUP3I-LF is a 3-inch black IMI (Iron Malleable Iron) coupling designed for joining pipe sections in plumbing and mechanical piping systems. This lead-free fitting meets requirements for potable water and general distribution applications. Its black iron construction provides durability in both above-ground and in-wall installations. Plumbers and pipefitters select this type of coupling when making straight connections in threaded iron pipe systems, particularly in gas distribution, fire suppression, and non-potable water lines.\u003c\/p\u003e\u003cp\u003eThis coupling is suited for residential and light commercial plumbing and mechanical piping installations where a 3-inch threaded iron coupling is required. It is commonly installed in gas supply lines, hydronic heating systems, and industrial process piping where black iron fittings are specified. The lead-free designation makes it appropriate for use in systems that may contact potable water, in compliance with applicable plumbing codes.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e3-inch nominal pipe size for use in standard iron pipe systems\u003c\/li\u003e\n\u003cli\u003eBlack iron malleable construction for strength and durability\u003c\/li\u003e\n\u003cli\u003eLead-free (LF) designation for potable water compliance\u003c\/li\u003e\n\u003cli\u003eThreaded connection for straightforward installation with standard pipe wrenches\u003c\/li\u003e\n\u003cli\u003eSuitable for gas, hydronic, and water distribution applications\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-style replacement and standard coupling fitting for 3-inch threaded black iron pipe systems.\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, including IPC and IFGC requirements. Shut off the water or gas supply and depressurize the line before beginning work. Apply an approved thread sealant or PTFE tape to male threads before assembly and tighten with a pipe wrench to achieve a leak-free joint. Do not over-tighten, as this may crack the fitting or damage threads.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eNominal Pipe Size\u003c\/strong\u003e: 3 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinish\u003c\/strong\u003e: Black\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLead-Free\u003c\/strong\u003e: Yes\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: BLCOUP3I-LF\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SIGMA","offers":[{"title":"Default Title","offer_id":51524811194674,"sku":"BLCOUP3I-LF","price":26.3,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/093ffdd9874252dc80af57b47d746677.jpg?v=1785458237","url":"https:\/\/voomisupply.com\/products\/sigma-blcoup3i-lf-3-inch-black-imi-coupling","provider":"Voomi Supply","version":"1.0","type":"link"}