When testing the operation of a dry pipe valve using the inspector's test valve, what is the acceptable water discharge delay for a system with a capacity of 500 gallons or less?

In the context of testing the operation of a dry pipe valve using the inspector's test valve, a system with a capacity of 500 gallons or less has specific requirements for water discharge timing. The acceptable delay in water discharge is particularly important for ensuring the system is functioning correctly and is responsive when activation occurs.

A delay of over 60 seconds indicates that the system is not effectively discharging water as per expected performance standards. For systems of this size, the standard mandate typically allows for a maximum delay of 60 seconds before water begins to discharge from the system once the inspector's test valve is activated. This ensures that the system is ready to provide immediate protection in the event of a fire.

Understanding these time delays helps ensure that the system maintains operational readiness and is capable of delivering water promptly when a fire is detected, which is critical for life safety and property protection. In contrast, a delay under 90 seconds or never over 60 seconds would indicate an acceptable operation, and any significant wait beyond that threshold suggests a potential malfunction or need for maintenance. Thus, option A fails to meet the required operational standards.