G2 Gas Fitter Exam 2026 – 400 Free Practice Questions to Pass the Exam

Compression fittings can indeed be used on copper tubing, particularly because they are designed to provide a secure and tight seal for various types of piping, including copper. They work by compressing a ring around the tubing when the nut is tightened, which creates a strong connection.

The misconception that compression fittings cannot be used on copper might stem from concerns about the reliability of the connection over time. However, when installed correctly, compression fittings can effectively join copper tubing and are widely utilized in plumbing and gas fitting applications.

Choosing the correct fitting is important because different materials and specific applications require particular types of connections to ensure safety and functionality. In some cases, specific applications or standards might suggest alternative methods, such as soldering or using a different fitting type, but this isn't an outright prohibition on using compression fittings with copper.

Understanding the appropriate context and application ensures that gas fitters can make safe and effective choices in their installations, which is critical in the gas fitting industry.