True or False: Cleaning the tubing and fitting is unnecessary when brazing.

Cleaning the tubing and fitting before brazing is essential to ensure a strong and reliable joint. When brazing, it is critical to remove any impurities, such as dirt, oil, oxidation, or moisture, from the surfaces that will be joined. These contaminants can interfere with the flow of the brazing material and negatively affect the integrity of the bond.

In the process of brazing, the filler metal must be able to flow freely into the joint and create a strong metallurgical bond. If the surfaces are not clean, the brazing material may not adhere properly, which can lead to weak joints and potential failures in the HVAC system.

While different types of brazing materials may have varying requirements for cleaning, it is a standard practice to clean all tubing and fittings before this process. This step ensures that the final connection is durable and meets safety standards.