If a backfire persists, what should be checked on the torch?

When a backfire occurs and continues to persist, it is essential to consider multiple factors related to the functioning of the torch. Each aspect plays a crucial role in ensuring safe and effective operation.

Checking the tip size is important because if the tip is incorrect for the type of work being done, it can lead to improper flame characteristics, which may result in a backfire. For instance, using a tip that is too small can cause excessive pressure buildup and create an unstable flame.

Assessing gas pressure is also critical. If the gas pressure is too high or too low, it can affect how the fuel mixes with oxygen, leading to an unstable flame. Inconsistent gas pressure can also cause fluctuations that might contribute to a backfire.

Additionally, inspecting for loose connections is vital for safety and functionality. Loose connections can lead to gas leaks, which not only increase the risk of backfires but also pose a significant safety hazard. Properly secured connections ensure that the gas flows as intended without interruptions.

Given that all these factors—tip size, gas pressure, and tight connections—can contribute to a persistent backfire, it is clear that a comprehensive check of each component is necessary for diagnosis and resolution. Therefore, the recommendation to check all of the above is