What must be done if plumbing is installed in an area subject to flooding?

If plumbing is installed in an area that is susceptible to flooding, it is essential to raise or protect it from water damage to ensure its functionality and compliance with safety standards. Flooding can cause significant damage to plumbing systems, leading to costly repairs and potential health hazards due to contamination of water supplies. By elevating the plumbing system above anticipated flood levels or implementing protective measures, such as installing backflow prevention devices or using flood barriers, the risk of water intrusion and associated damage can be mitigated. This proactive approach not only protects the plumbing installation but also ensures the long-term viability and safety of water delivery and waste disposal systems in flood-prone areas.

Other options would not adequately address the risks associated with flooding. Simply leaving the plumbing as is could lead to extensive damage, while covering it with sandbags doesn't provide a reliable long-term solution. Checking the plumbing only before the rainy season does not prevent damage but merely serves as an inspection that might not identify potential problems in advance. Thus, prioritizing the elevation or protection of the plumbing system is a crucial step in flood-prone areas.