{"product_id":"b-k-mueller-521-702hn-black-union-3-8-in-brass-iron-5-pack","title":"B K Mueller 521-702HN Black Union 3\/8 in Brass Iron 5 Pack","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe B K Mueller Industries 521-702HN is a 3\/8-inch black union fitting constructed from brass and iron. Unions allow a pipe section to be disconnected and reconnected without disturbing the surrounding piping, making them a standard component in gas and plumbing distribution systems. This fitting ships in a package of five units, making it a practical choice for contractors stocking jobsite inventory or servicing multiple connections in a single visit. The black finish is typical of gas-service fittings used in residential and light commercial applications.\u003c\/p\u003e\n\u003cp\u003eThis union is suited for use in low-pressure gas piping, black iron pipe distribution systems, and similar applications where a removable threaded connection is required. Plumbers and gas fitters install these fittings during appliance rough-in, service disconnects, and system modifications. The 3\/8-inch size is common at appliance drops and branch connections serving furnaces, water heaters, dryers, and similar equipment.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e3\/8-inch fitting size for standard branch and appliance connections\u003c\/li\u003e\n  \u003cli\u003eBlack finish consistent with gas-service piping conventions\u003c\/li\u003e\n  \u003cli\u003eBrass and iron construction for durability in threaded pipe systems\u003c\/li\u003e\n  \u003cli\u003eRemovable union design allows service disconnect without cutting pipe\u003c\/li\u003e\n  \u003cli\u003ePackaged in quantities of five for multi-connection jobs\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OEM-style replacement or service fitting for standard 3\/8-inch threaded black iron pipe systems in residential and light commercial gas or plumbing applications.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation should be performed by a licensed plumber or gas fitter in accordance with applicable codes including the IFGC and local amendments. Shut off the gas supply and verify zero pressure at the line before disassembling or installing any union fitting. Apply appropriate thread sealant rated for gas service to all male threads before assembly. Do not over-tighten; follow standard trade practice for threaded iron fittings and leak-test all connections after installation.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFitting Size\u003c\/strong\u003e: 3\/8 inches\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 units\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 1.58 pounds\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: B K Mueller Industries\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 521-702HN\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SOUTHLAND","offers":[{"title":"Default Title","offer_id":51562524606770,"sku":"521-702HN","price":27.2,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/7f5a6921cfe6f6b272a96dd07bfb01eb.jpg?v=1786478712","url":"https:\/\/voomisupply.com\/products\/b-k-mueller-521-702hn-black-union-3-8-in-brass-iron-5-pack","provider":"Voomi Supply","version":"1.0","type":"link"}