What method must be provided to minimize the possibility of water entering relief devices or discharge piping?

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Rain caps are designed to prevent water, debris, and other contaminants from entering relief devices or discharge piping. This is particularly important because any intrusion of water can compromise the functionality of these safety devices, potentially leading to hazardous situations. The use of rain caps effectively blocks rainwater from directly accessing the openings while allowing proper venting of gases. Additionally, they can be beneficial in preventing ice formation in colder climates, which can also affect the operation of relief systems.

The other methods, while possibly relevant in certain contexts, do not specifically address the prevention of water entry into relief devices. Drainage systems, for instance, are typically used to manage surface water or runoff but may not directly prevent water ingress at specific openings. Sealing compounds are used for sealing joints and creating airtight connections but do not provide a barrier against precipitation. Ventilation fans can help manage airflow and prevent buildup of gases, but they do not serve the specific function of blocking water from entering relief devices or piping.

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