The Plumber's Choice 1/2 in. Straight Coupling Pipe Fittings Push to Connect PEX Copper CPVC Brass (5-Pack) 125UPSC - The Home Depot
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Amazon.com: Adapter Nipple 3/4" Male x 1 “ Female Pipe Fitting NPT - Brass Adapter 3/4 inch x 1inch Female Pack of 1 : Industrial & Scientific
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Plumbing Fittings | Building and Interiors
Copper Plumbing Pipe Fitting Elkhart 3/4" C x Male Adapter - 10 Pack, Made in USA - - Amazon.com
1/2 In. Brass Male Female Thread Adapter Connector Plumbing Pipe Fitting Kit New | eBay