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SharkBite 1/2-in PEX Crimp x 1/2-in Polybutylene Brass Transition Coupling in the PEX Pipe, Fittings & Specialty Tools department at Lowes.com
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ColumPRO 1/2'' PEX Poly Alloy Fittings 15 Pack, 6 Elbow + 5 Coupling + 4 Tee Fittings, for Multiple PEX Plumbing Projects - Amazon.com
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Apollo Part # APXC3410PK - Apollo 3/4 In. Brass Pex-B Barb Coupling (10-Pack) - Pex Couplings - Home Depot Pro
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Supply Giant 5-1012PPRC Plastic PEX Poly Alloy Straight Coupling Barb Pipe Fitting 1 x 1/2 Inch Pack of 5 - Walmart.com
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ColumPRO 1/2'' PEX Poly Alloy Fittings 15 Pack, 6 Elbow + 5 Coupling + 4 Tee Fittings, for Multiple PEX Plumbing Projects - Amazon.com
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