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Proline Series 3/8-in x 1/2-in Compression x Sweat Adapter Fitting in the Brass Fittings department at Lowes.com
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NIBCO 1/2 in. CPVC-CTS and Copper Alloy Lead-Free Slip x Compression Union C4733-7-LF - The Home Depot
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Anderson Metals-50062-12 Brass Compression Tube Fitting, Union, 3/4"Tube O.D. x 3/4" Tube O.D.: Amazon.com: Industrial & Scientific
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Proline Series 5/8-in x 1/2-in Compression x Fip Adapter Coupling Fitting in the Brass Fittings department at Lowes.com
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