Which device is required to minimize the entrance of water or matter into the relief device or discharge piping?

The device that is specifically designed to minimize the entrance of water or foreign matter into the relief device or discharge piping is the rain cap. Rain caps function by covering the opening of relief valves or discharge lines, preventing precipitation, debris, or contaminants from entering. This is particularly important in maintaining the safety and functionality of the relief system, as any obstruction or contamination can impair its performance and reduce its effectiveness in venting excess pressure.

Rain caps are essential in outdoor installations where exposure to environmental elements is a concern. By shielding the relief system from water and foreign matter, they help ensure that the system remains operable under various conditions, thus enhancing overall safety and compliance with regulations.