How often should distribution mains be inspected?

Distribution mains should be inspected regularly based on local policies because this approach ensures that maintenance is tailored to the specific needs and conditions of the water distribution system in a given area. Local policies are typically developed based on various factors including the age of the infrastructure, the type of materials used, environmental conditions, and the overall water quality goals set by municipal or regional authorities.

Regular inspections help identify potential issues such as leaks, corrosion, or blockages before they lead to significant problems or failures. This proactive approach not only enhances the reliability of the water supply but also plays a crucial role in public health and safety.

While other options provide timeframes for inspection, they are less adaptive. Annual inspections might not be sufficient in areas with rapidly changing conditions, while inspections every five years could overlook potential issues that arise sooner. Inspecting only when problems arise is reactive and can lead to crises that significantly impact service delivery and public health.