For a wet system with a trapped section of pipe that exceeds 50 gallons of water, what is the minimum size valve and plug that can be used?

For a wet system with a trapped section of pipe that exceeds 50 gallons, the appropriate minimum size for both the valve and the plug is crucial to ensure proper drainage and maintenance of the system. When dealing with larger volumes of water, as is the case in this scenario, a 1-inch valve and plug size is necessary to adequately manage the flow rate during maintenance activities.

A 1-inch valve allows for sufficient water flow and reduces the risk of creating excessive pressure within the trapped section of pipe. This prevents issues that could arise from slow drainage or back pressure which could affect the overall performance of the sprinkler system. Additionally, using a valve and plug of this size ensures that when maintenance is needed, the trapped water can be easily removed without significant delay or obstruction.

In contrast, using smaller valves or plugs could lead to complications, as they may not handle the volume of water effectively or may fail to operate under the pressures generated by a full section of a wet system. Therefore, a 1-inch specification aligns with best practices and safety protocols in sprinkler fitting and maintenance.