Which tool is most commonly used for fastening copper tubing in plumbing installations?

The most commonly used tool for fastening copper tubing in plumbing installations is actually a soldering iron, which is utilized for soldering the joints of copper pipes. This process involves melting solder at the joint connections, which then cools to create a strong, leak-proof bond.

A soldering iron heats the metal and the solder, allowing for the proper fusion of the copper parts. This method is critical for ensuring that the plumbing system is watertight and durable over time.

While tools like fitting clamps and PEX crimping tools have their specific applications, they are not used for fastening copper tubing. Fitting clamps may secure pipes but are not the primary method for copper. PEX crimping tools apply to PEX tubing, which is a different material altogether. A pipe wrench is designed for gripping and turning pipes but doesn't facilitate fastening in the way that soldering does.

Understanding the correct fastening techniques and tools is essential for effective plumbing installation and maintenance.