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John Guest Acetal Copolymer Tube Fitting, Straight Adaptor, 1/2" Tube OD x 1/2" NPTF Male (Pack of 10): Push To Connect Tube Fittings: Amazon.com: Industrial & Scientific
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John Guest 10-Pack 1/2-in dia Standard Tee Push Fitting in the Push to Connect Fittings department at Lowes.com
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