What is the minimum clearance required for water mains running horizontal to sewer mains?

The requirement for a minimum of 10 feet of clearance between water mains and sewer mains is determined to ensure public health and safety. This clearance helps to prevent potential contamination of the drinking water supply by sewage, which could occur if there is a failure or leakage in the sewer line. Maintaining this distance minimizes the risk of cross-connection and contamination through groundwater, soil, or other means. Proper separation of these utilities is crucial for the protection of potable water sources and to adhere to sanitary regulations in water and wastewater management practices.