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Smith Cooper 150# Black Malleable Iron 3/4 in. Banded Coupling Pipe Fittings - Threaded - John M. Ellsworth Co. Inc.
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Horiznext 3/4 npt Stainless Steel fitting, home brew adapter female threaded pipe cast coupling for plumbing tubing shower hose water heating extender: Amazon.com: Industrial & Scientific
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Sigma ProConnex 3/4-in Zinc-plated Steel Threaded Coupling Conduit Fittings in the Conduit Fittings department at Lowes.com
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Pipe Fittings Direct. 3/4 inch weld on mechant steel half coupling, Class 150, Internal Thread X Butt Weld
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Crouse-Hinds 191 3/4" Threaded 3pc Rigid/IMC Conduit Coupling, Concrete Tight, Malleable Iron | Cooper Electric
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