MCC-NH Gas Fitters Practice Exam

What should be done when adding appliances to an existing system?

1. Install additional valves

2. Pull a permit

3. Upgrade the main line

4. Seek customer approval

The correct answer is: Pull a permit

When adding appliances to an existing gas system, pulling a permit is essential for several reasons. Firstly, obtaining a permit ensures that any modifications made to the system comply with local codes and regulations, which are in place to ensure safety and reliability. These regulations can vary by municipality, so it is critical to verify adherence to those specific standards. Additionally, pulling a permit allows for inspections by qualified authorities. This step helps ensure that the installation is performed correctly and safely, reducing risks such as gas leaks or system malfunctions. Permits also provide a record of the work done, which can be important for future reference, especially when it comes to insurance claims or selling the property. While installing additional valves, upgrading the main line, and seeking customer approval might be necessary steps in certain situations, they do not address the vital requirement of compliance with regulations and safety standards, which is why obtaining a permit takes precedence when modifying an existing gas system.