NFPA-99 Practice Exam 2026 – The All-in-One Guide to Exam Success!

Pressure indicators are essential components in gas distribution systems, designed primarily to indicate system pressure. These indicators provide critical information regarding the pressure levels within the gas distribution network, which is vital for ensuring the safe and efficient operation of the system.

By displaying current pressure readings, pressure indicators help operators monitor the system's performance and adjust as necessary to maintain optimal pressures, preventing both overpressure and underpressure conditions. This monitoring is particularly important to avoid potential hazards that could arise from pressure anomalies, such as leaks or system failures.

In comparison, other functions related to gas systems, such as measuring gas flow rates, confirming the presence of gas, or preventing backflow, do not fall under the primary function of pressure indicators. While these functions are important for the overall safety and effectiveness of gas distribution systems, they are accomplished through different types of equipment and mechanisms specifically designed for those purposes.