What are tube compression fittings, and how do they work?
Types of Pipe Fittings in a Plumbing System - Parklane Commercial Corporation
B Type Gel Filled Wire Connectors - Silicone Telephone Alarm Wire Crimp Bean Splice for Low Voltage Application, Blue (1000 Pcs): Amazon.com: Industrial & Scientific
Formufit 1 in. Furniture Grade PVC 3-Way Elbow in White (4-Pack) F0013WE-WH-4 - The Home Depot