John Guest Small Tubing Quick Connect Fittings and Valves
Watts® AquaLock™ 1/2" x 1/2" x 1/4" Push to Connect Plastic Tee at Menards®
Watts Aqualock 1/2 In. CTS x 1/2 In. FPT Push-to-Connect Plastic Adapter | Hills Flat Lumber
Plastic Quick Connect - Boshart Industries
Watts 1/2 In. x 3/8 In. OD Tubing Quick Connect Plastic Coupling - Parker's Building Supply
iSpring Quick Connect Fitting Reverse Osmosis Drinking Water Fixed Elbow Fitting, 1/4 In. NPT x 1/4 In., 2 Pack in the Push to Connect Fittings department at Lowes.com