{"product_id":"b-k-mueller-indsimport-521-706hn-black-union-1-1-4-in","title":"B K\/mueller Inds(import) 521-706HN Black Union 1-1\/4 in","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe B K\/MUELLER INDS(IMPORT) 521-706HN is a 1-1\/4 inch black union constructed from brass and iron. Unions are three-piece fittings used to join two sections of pipe in a way that allows for future disconnection without cutting. This fitting is designed for gas or liquid piping systems where serviceability matters — the union joint lets a technician break the line cleanly for component removal or system repair. Licensed plumbers and gas fitters install this type of fitting as part of standard black iron piping assemblies in residential and light commercial applications. Each package contains 5 units, and total package weight is 5.72 pounds.\u003c\/p\u003e\u003cp\u003eBlack iron unions like the 521-706HN are common in natural gas and propane supply lines, as well as in some steam and water piping systems. The 1-1\/4 inch size is frequently used in main gas supply runs and branch lines serving high-demand appliances such as boilers, furnaces, commercial ranges, and unit heaters. The brass seat in the union end provides a reliable metal-to-metal seal at the joint face, reducing the likelihood of leak points over repeated make-and-break cycles.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e1-1\/4 inch nominal pipe size fits standard black iron pipe threads\u003c\/li\u003e\n\u003cli\u003eBrass and iron construction provides corrosion resistance at the sealing surface\u003c\/li\u003e\n\u003cli\u003eThree-piece union design allows pipe disconnection without cutting or unthreading long pipe runs\u003c\/li\u003e\n\u003cli\u003eSold in a package of 5 units for multi-joint jobs or stocking purposes\u003c\/li\u003e\n\u003cli\u003eBlack finish is standard for gas piping applications per common trade practice\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-style replacement or new-installation fitting for 1-1\/4 inch black iron pipe systems in residential and commercial plumbing and gas piping applications.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eBlack iron unions are installed by licensed plumbers or gas fitters in accordance with the International Fuel Gas Code (IFGC) or International Plumbing Code (IPC) as applicable. Shut off the gas supply or isolate the piping section and relieve system pressure before beginning work. Apply an approved pipe thread sealant or thread tape rated for the service type to all male threads before assembly. Do not over-tighten the union nut — hand-tight plus a measured turn with a pipe wrench is standard; refer to local code and the sealant manufacturer for joint finishing requirements.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePipe Size\u003c\/strong\u003e: 1-1\/4 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFitting Type\u003c\/strong\u003e: Union\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Brass and Iron\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinish\u003c\/strong\u003e: Black\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage Quantity\u003c\/strong\u003e: 5\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage Weight\u003c\/strong\u003e: 5.72 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUnit of Measure\u003c\/strong\u003e: EA\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eStandard Information\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: B K\/MUELLER INDS(IMPORT)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 521-706HN\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SOUTHLAND","offers":[{"title":"Default Title","offer_id":51561145893170,"sku":"521-706HN","price":55.48,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/f6477ef3ea9959357ed649bd39b7b350_f95e1b7a-e56b-4c41-a3bb-3a9eae1d7fd4.jpg?v=1786462772","url":"https:\/\/voomisupply.com\/products\/b-k-mueller-indsimport-521-706hn-black-union-1-1-4-in","provider":"Voomi Supply","version":"1.0","type":"link"}