{"product_id":"b-k-mueller-indsimport-521-224hc-black-merchant-coupling","title":"B K\/mueller Inds(import) 521-224HC Black Merchant Coupling","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe B K\/MUELLER INDS(IMPORT) 521-224HC is a 3\/4-inch black merchant coupling designed for joining threaded pipe sections in plumbing, gas distribution, and mechanical piping systems. Black iron merchant couplings are a standard fitting for low-pressure gas lines, water distribution, and general industrial piping where malleable or black iron construction is appropriate. This fitting ships in a package quantity of 80 units, making it practical for contractors and supply houses stocking for ongoing installation work. Licensed plumbers and pipefitters are the primary installers for this type of fitting.\u003c\/p\u003e\u003cp\u003eThis black merchant coupling is suited for residential and light commercial applications where threaded black iron pipe connections are required. Common installation scenarios include natural gas and propane supply lines, compressed air distribution, fire suppression systems, and general mechanical piping. The 3\/4-inch size is one of the most frequently specified pipe sizes in residential gas and water service roughing work.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e3\/4-inch pipe size for standard threaded iron pipe connections\u003c\/li\u003e\n\u003cli\u003eBlack iron finish suitable for gas line and mechanical piping applications\u003c\/li\u003e\n\u003cli\u003eMerchant coupling style provides a full-engagement, straight threaded joint\u003c\/li\u003e\n\u003cli\u003ePackaged in quantities of 80 units per package for job-site or shop stocking\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-style replacement and standard-stock fitting compatible with 3\/4-inch NPT 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 mechanical and plumbing codes, including the IFGC for gas applications. Shut off all gas or water supply and verify the line is fully depressurized before cutting into or threading pipe. Apply an approved pipe thread sealant or PTFE tape rated for the service medium to all male threads before assembly. Tighten to snug-plus-hand-tight using proper pipe wrenches; do not over-torque threaded iron fittings.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePipe Size\u003c\/strong\u003e: 3\/4 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinish\u003c\/strong\u003e: Black\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFitting Type\u003c\/strong\u003e: Merchant Coupling\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage Quantity\u003c\/strong\u003e: 80 units\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage Weight\u003c\/strong\u003e: 20.76 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUnit of Measure\u003c\/strong\u003e: Each (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: 521-224HC\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SOUTHLAND","offers":[{"title":"Default Title","offer_id":51558949355826,"sku":"521-224HC","price":97.75,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/b698354413a6d81b4d2537bbc4f36c7b.jpg?v=1786423847","url":"https:\/\/voomisupply.com\/products\/b-k-mueller-indsimport-521-224hc-black-merchant-coupling","provider":"Voomi Supply","version":"1.0","type":"link"}