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ProSource 21-1/2G Galvanized Malleable Coupling 1/2 Inch: Galvanized Couplings 1/8 Inch To 1/2 Inch (045734117662-1)
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Anvil 8700135455, Malleable Iron Pipe Fitting, Reducer Coupling, 1" x 1/2" NPT Female, Galvanized Finish: Amazon.com: Industrial & Scientific
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Amazon.com: Eastman 3-7/8 Inch Long Pattern Compression Coupling, 1/2 Inch IPS, Galvanized Steel, 20562 : Everything Else
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Proplus Part # 44330 - Proplus Galvanized Compression Coupling, 1/2 In., Lead Free - Galvanized Couplings - Home Depot Pro
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