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Amazon.com: KOOTANS 4pcs Forged Brass Reducing Hex Nipple, 3/8" NPT Male x 1/4" NPT Male Pipe Adapter Brass Pipe Fitting Couplings : Industrial & Scientific
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Amazon.com: KOOTANS Forged Brass Reducing Hex Nipple, 1/4'' NPT Male x 1/8'' NPT Male Thread Adapter Brass Pipe Fitting Connector Couplings (Pack of 4) : Industrial & Scientific
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PVC Male Adapter Pipe Fitting - SCH 40 PVC Fittings 3/4 Inch MNPT x 1 Inch Slip Socket PVC Connectors - PVC Pipe Connectors for Plumbing Water Line – Male Adapter Fitting - Amazon.com
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Proline Series 3/4-in x 1-in Threaded Male Adapter Bushing Fitting in the Brass Fittings department at Lowes.com
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Parker - Industrial Pipe Adapter: 1/2″ Female Thread, 1/2″ Male Thread, MNPTF x FBSPP - 60041951 - MSC Industrial Supply
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