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SharkBite 3/8-in OD Push-to-Connect Coupling in the Push to Connect Fittings department at Lowes.com
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Amazon.com: PureSec 3/8 inch Tee Connector Push to Connect Fittings Plastic Quick Fitting for water purification&RO System (5, 3/8" Tube O.D.X3/8" Tube O.D.X 3/8" Tube O.D.) : Industrial & Scientific
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Anderson Metal 53715-0806 1/2 By 3/8 Inch Plastic Tubing Coupling: Nylon Insert Fittings (719852915898-2)
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