{"product_id":"southland-521-204hn-black-iron-coupling-3-4-inch","title":"Southland 521-204HN Black Iron Coupling 3\/4 Inch","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe SOUTHLAND 521-204HN is a black iron coupling designed to join two pipes of matching diameter in a secure, leak-resistant connection. This fitting is commonly used in systems carrying lubricating oil, grease, LP gas, and fuel. Constructed from black iron, it provides the durability and pressure tolerance required for non-potable fluid and gas transport in both residential and light commercial applications. Licensed plumbers, pipefitters, and gas technicians install this type of fitting as part of threaded iron pipe assemblies where a reliable mechanical joint is needed.\u003c\/p\u003e\n\u003cp\u003eThis coupling is suited for threaded black iron pipe systems in gas distribution, oil lubrication lines, and fuel supply applications. It is not rated for potable water service. The 3\/4 inch size makes it a common choice for branch and main line connections in residential LP gas piping and small commercial fuel systems. It also sees use in custom fabrication and DIY trade projects involving iron pipe.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eBlack iron construction provides durability for gas and fuel applications\u003c\/li\u003e\n  \u003cli\u003eJoins two pipes of matching 3\/4 inch diameter in a threaded connection\u003c\/li\u003e\n  \u003cli\u003eCompatible with LP gas, lubricating oil, grease, and fuel service\u003c\/li\u003e\n  \u003cli\u003eNot intended for potable water applications\u003c\/li\u003e\n  \u003cli\u003eSold individually for flexible project and repair use\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as a standard threaded replacement or new-installation coupling for 3\/4 inch black iron pipe systems used in gas, oil, and fuel transport applications.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eThis fitting is installed by licensed plumbers or pipefitters working on threaded black iron pipe systems. Shut off and depressurize the line fully before removing or installing any fitting. Apply appropriate pipe thread sealant rated for gas or fuel service to all male threads before assembly. Follow applicable local codes, including IFGC requirements, for gas piping installations.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePipe Size\u003c\/strong\u003e: 3\/4 inch\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Black Iron\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eConnection Type\u003c\/strong\u003e: Threaded\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.3 pounds\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eApplication\u003c\/strong\u003e: Oil, grease, LP gas, fuel (non-potable only)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSold As\u003c\/strong\u003e: Each\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: SOUTHLAND\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 521-204HN\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SOUTHLAND","offers":[{"title":"Default Title","offer_id":51777966965042,"sku":"521-204HN","price":14.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/4c1f50a0322f143fb44ec630334c297f_e018e5f5-c44f-4298-9504-af5194089777.jpg?v=1789172371","url":"https:\/\/voomisupply.com\/products\/southland-521-204hn-black-iron-coupling-3-4-inch","provider":"Voomi Supply","version":"1.0","type":"link"}