How many gauges are required on a dry pipe system?

In a dry pipe system, two gauges are typically required to monitor the system accurately. One gauge is used to measure the pressure in the dry pipe itself, providing essential information about the readiness of the system to deliver water when needed. The second gauge is crucial for monitoring the air pressure that keeps the water supply from entering the system until needed. This dual-gauge setup is vital for ensuring operational reliability and safety, as it allows for continuous assessment of both air pressure and system integrity, thus enabling prompt maintenance if any issues arise.