What is the maximum time allowed for water to reach the inspector's test on a dry pipe system?

The maximum time allowed for water to reach the inspector's test on a dry pipe system is stipulated to be 60 seconds. This requirement is in place to ensure that the system operates efficiently and reliably during testing and emergencies.

In a dry pipe system, the pipes are filled with air or nitrogen, and water is held in a pressurized supply until a sprinkler is activated. When a sprinkler activates, the air pressure drops, allowing the valve to open and water flows into the system. The time it takes for water to reach the inspector's test is crucial to verify that the system can respond quickly when needed.

A 60-second requirement ensures that the system delivers water promptly, which is vital in a fire emergency to suppress flames effectively. This time limit balances operational efficacy with thorough testing of the dry pipe system. Other options represent timings that exceed the standard requirements, thereby making them unsuitable for ensuring the rapid response needed in fire protection systems.