When a quick-disconnect is used on a gas supply system, what device must be included in the piping system?

Prepare for the Gas Technician Certification Exam. Study with flashcards and multiple choice questions, each question has hints and explanations. Get ready for your exam!

In a gas supply system that incorporates a quick-disconnect, it is essential to have a shut-off valve located upstream of the disconnect. This is critical for safety and operational efficiency. The shut-off valve allows for the immediate cessation of gas flow when necessary, particularly during maintenance or emergencies. It ensures that, when the quick-disconnect is engaged or disengaged, the gas supply can be controlled effectively to prevent any potential leaks or hazards.

Including a shut-off valve helps mitigate risks associated with the potential release of gas when the quick-disconnect is disconnected. It ensures that, even if the connection is broken, there is still a dense barrier that secures the gas supply, protecting both equipment and personnel from exposure. This device provides an added layer of safety, adhering to best practices and industry regulations.