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Schedule 40 PVC Pipe Slip x Fipt Reducing Female Adapter (1/2" x 3/4" Dia. (5 Pack)) - 435-074 - Amazon.com
316 Stainless Steel, 3/4 in x 3/4 in Fitting Pipe Size, Reducing Adapter - 14M047|12-12 RA-SS - Grainger
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3/8" NPT Female to 1/4" NPT Male Brass Pipe Adaptor/Adapter Straight Reducer /Reducing Coupling Male to Female: Pipe Fittings: Amazon.com: Industrial & Scientific
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