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Amazon.com: Pipe Decor 3/4” x 3” Malleable Cast Iron Pipe, Pre Cut, Industrial Steel Grey Fits Standard Three Quarter Inch Black Threaded Pipes Nipples and Fittings, Build Vintage DIY Furniture, 8 Pack :
What methods exist to size black iron natural gas piping in a residential situation, and where can I get each procedure? - Quora
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LASCO 29-0517 Black Iron, Nipple and Coupling with Right and Left Hand Thread, 3/4-Inch x 4-Inch - Amazon.com
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Supply Giant 1" Black Pipe Fitting Tee for Industrial Piping or DIY Projects, Cast Iron - Walmart.com
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