{"title":"Black Steel Fittings - Unions","description":"\u003cp\u003eComplete your gas, fire suppression, or industrial piping system with \u003cstrong\u003eblack steel malleable iron fittings\u003c\/strong\u003e — the standard choice wherever threaded steel pipe connections are required. Built tough for high-pressure and high-temperature applications, black steel fittings are a staple on every commercial and residential gas line rough-in.\u003c\/p\u003e\n\n\u003ch3\u003eWhat Are Black Steel Fittings?\u003c\/h3\u003e\n\u003cp\u003eBlack steel fittings are malleable iron threaded fittings with a black oxide finish (no galvanizing). They are designed for use with black steel pipe on \u003cstrong\u003enatural gas, propane, fire sprinkler, steam, and compressed air systems\u003c\/strong\u003e. The black finish distinguishes them from galvanized fittings, which are not suitable for gas service.\u003c\/p\u003e\n\n\u003ch3\u003eFitting Types Available\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eElbows\u003c\/strong\u003e — 90° and 45° in street and standard configurations\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTees\u003c\/strong\u003e — straight and reducing tees for branch connections\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCouplings\u003c\/strong\u003e — standard and reducing for inline connections\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNipples\u003c\/strong\u003e — close, short, and long in common sizes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCaps \u0026amp; Plugs\u003c\/strong\u003e — for capping open ends and pressure testing\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUnions\u003c\/strong\u003e — for connections that may need to be broken and remade\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBushings\u003c\/strong\u003e — for reducing threaded connections\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eCommon Applications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eNatural gas and propane distribution lines\u003c\/li\u003e\n\u003cli\u003eFire suppression and sprinkler systems\u003c\/li\u003e\n\u003cli\u003eSteam and high-temperature piping\u003c\/li\u003e\n\u003cli\u003eCompressed air systems\u003c\/li\u003e\n\u003cli\u003eIndustrial process piping\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eKey Specs\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eMaterial: Malleable iron with black oxide finish\u003c\/li\u003e\n\u003cli\u003eThread standard: NPT (National Pipe Thread)\u003c\/li\u003e\n\u003cli\u003ePressure rated: 150 lb class (standard) — suitable for most gas and steam applications\u003c\/li\u003e\n\u003cli\u003eSizes: 1\/4\" through 2\" (common stock sizes)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNot for use with galvanized pipe on gas lines\u003c\/strong\u003e — always use black fittings with black pipe for gas service\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eSame-day pickup available at AC Construction Depot in Pineville, NC.\u003c\/strong\u003e Serving plumbers, pipefitters, and contractors across the greater Charlotte area. Call us at \u003cstrong\u003e704-835-1086\u003c\/strong\u003e to confirm availability on specific sizes and configurations before your trip.\u003c\/p\u003e","products":[{"product_id":"southland-black-union-iron-2","title":"Southland Black Iron Union - 2\"","description":"\u003cp\u003eSouthland Black Union Iron - 2\"??\u003c\/p\u003e\n\u003cp\u003eModel: 521-708HN\u003c\/p\u003e\n\u003cp\u003eSKU: ACPI15919632\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eLID: \u003c\/strong\u003eD8-1\u003c\/p\u003e","brand":"B\u0026K\/MUELLER INDUSTRIES","offers":[{"title":"Default Title","offer_id":47451938455846,"sku":"ACPI15919632","price":48.79,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0796\/4626\/1542\/files\/15911080_db2ee353-1e3f-445a-9e8e-d199ce6da0f2.jpg?v=1714070250"},{"product_id":"southland-black-iron-union-1-1-2","title":"Southland Black Iron Union - 1-1\/2\"","description":"\u003cp\u003eSouthland Black Iron Union - 1-1\/2\"??\u003c\/p\u003e\n\u003cp\u003eModel: 521-707HN??\u003c\/p\u003e\n\u003cp\u003eSKU: ACPI15919624\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eLID: \u003c\/strong\u003eD8-2\u003c\/p\u003e","brand":"B\u0026K\/MUELLER INDUSTRIES","offers":[{"title":"Default Title","offer_id":47451938488614,"sku":"ACPI15919624","price":32.59,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0796\/4626\/1542\/files\/15911080_5077fc40-7523-4cfb-ad4b-adf746d9977f.jpg?v=1714072335"},{"product_id":"southland-union-black-iron-1","title":"Union Black Iron - 1\"","description":"\u003cp\u003eUnion Black Iron - 1\"\u003c\/p\u003e\n\u003cp\u003eModel: 521-705HN??\u003c\/p\u003e\n\u003cp\u003eSKU: ACPI15919608\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eLID: \u003c\/strong\u003eD9-2\u003c\/p\u003e","brand":"B\u0026K\/MUELLER INDUSTRIES","offers":[{"title":"Default Title","offer_id":47451938521382,"sku":"019442147693","price":8.1,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0796\/4626\/1542\/files\/15911080_8de99590-3aa0-42d7-8c27-e303f055d22d.jpg?v=1714065128"},{"product_id":"ac32888406674","title":"STZ Black Malleable  Iron Union - 1\/2\"","description":"\u003cp\u003eSTZ Industries Black Iron Union - 1\/2\" FPT X FPT\u003c\/p\u003e\n\u003cp\u003eModel: 501565\u003c\/p\u003e\n\u003cp\u003eSKU: ACPI15919582\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eLID: \u003c\/strong\u003eD9-4\u003c\/p\u003e","brand":"B\u0026K\/MUELLER INDUSTRIES","offers":[{"title":"Default Title","offer_id":47451938619686,"sku":"032888406674","price":5.49,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0796\/4626\/1542\/files\/15911080_b6ab6a73-79a6-4a75-8da5-4c98d8698418.jpg?v=1714067331"},{"product_id":"southland-union-black-iron-1-1-4","title":"Southland Union - Black Iron - 1-1\/4\"","description":"\u003cp\u003eSouthland Union - Black Iron - 1-1\/4\"\u003c\/p\u003e\n\u003cp\u003eModel: 521-706HN\u003c\/p\u003e\n\u003cp\u003eSKU: ACPI15919616\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eLID\u003c\/strong\u003e: D9-1\u003c\/p\u003e","brand":"B\u0026K\/MUELLER INDUSTRIES","offers":[{"title":"Default Title","offer_id":47451944157478,"sku":"ACPI15919616","price":27.7,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0796\/4626\/1542\/files\/15911080_90fce6ff-a2d7-47ae-9e13-feadf9392c31.jpg?v=1714063945"},{"product_id":"southland-black-iron-union-3-4","title":"Southland Black Iron Union - 3\/4\"","description":"\u003cp\u003eB\u0026amp;K\/Mueller Southland Black Malleable Iron Union - 3\/4in\u003c\/p\u003e\n\u003cp\u003eModel: 521-704HN, 019142147761\u003c\/p\u003e\n\u003cp\u003eSKU: ACPI15919590\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eLID\u003c\/strong\u003e: D9-3\u003c\/p\u003e","brand":"B\u0026K\/MUELLER INDUSTRIES","offers":[{"title":"Default Title","offer_id":48284698444070,"sku":"019442147761","price":7.98,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0796\/4626\/1542\/files\/15911080.jpg?v=1713359950"},{"product_id":"stz-black-malleable-iron-union-1-1-4","title":"STZ Black Malleable Iron Union - 1-1\/4\"","description":"\u003cp\u003eSTZ Black Malleable Iron Union - 1-1\/4\"\u003c\/p\u003e\n\u003cp\u003eModel: 501564\u003c\/p\u003e\n\u003cp\u003eLID:\u003c\/p\u003e","brand":"STZ INDUSTRIES","offers":[{"title":"Default Title","offer_id":50554576699686,"sku":null,"price":11.09,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0796\/4626\/1542\/files\/15911080_9c625088-51c6-4134-808d-d3c8e917d2fe.jpg?v=1748529264"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0796\/4626\/1542\/collections\/1591740_4b6ba707-7511-4899-876f-9f97aeec3dc5.jpg?v=1780763692","url":"https:\/\/acconstructiondepot.com\/collections\/black-steel-fittings-unions.oembed","provider":"AC Construction Depot","version":"1.0","type":"link"}