Fairview Fittings Compression Connector 1/4 Poly Tube X 1/8 Pipe 468-4A - RV Parts Express - Specialty RV Parts Retailer
Amazon.com: PureSec Union Tee Connector 1/4 inch OD Tubing/Hose/Pipe Use Quick Connect Plastic Fitting for Reverse Osmosis System(Pack of 5) : Everything Else
Plastic Barbed Insert Fittings for Polyethylene Pipe
Compression Tube Fittings - Poly Female Connectors 1/4" x 1/8"
Everbilt 1/4 in. Nylon Compression Sleeve Fittings (3-Pack) 800659 - The Home Depot
Amazon.com: JoyTube Plastic 1/4" ID Hose Barb Fittings, Equal Barbed Tee Pipe Connectors 3 Way Joint Splicer Mender Union Adapter for Boat Aquarium, Pack of 6 : Industrial & Scientific