What gauge is required on ALL boilers?

• A. Pressure gauge
• B. Thermometer
• C. Vacuum gauge
• D. Manometer

Answer: (A)

Boilers must be operated within safe pressure limits, so having a means to continuously monitor that pressure is essential. A pressure gauge provides an immediate readout of the boiler’s internal pressure, allowing the operator to keep it within the designed range and react quickly if it starts to rise too high or drop too low. This safety and control need is why a pressure gauge is required on all boilers. Other gauges measure temperature, vacuum, or pressure differences, but they’re not universally required on every boiler. A thermometer shows heat, a vacuum gauge checks for negative pressure, and a manometer measures differences in pressure—none of these are standard, universal requirements for all boilers.