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Proline Series 3/4-in x 3/4-in Threaded Dielectric Union Fitting in the Brass Fittings department at Lowes.com
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The Plumber's Choice 1 in. FIP x 3/4 in. Press Dielectric Union Pipe Fittings Galvanized Brass Lead Free 3256EVGS-OM - The Home Depot
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WORLDWIDE SOURCING 34B-3/4G Ground Joint Pipe Union, 3/4 in, Threaded, 150 Psi, Malleable Iron, Galvanized - Pipe Fittings - Amazon.com
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