What is the minimum distance that the bottom of a water service pipe should be from the top of a sewer?

The minimum distance that the bottom of a water service pipe should be from the top of a sewer is set at 12 inches. This requirement is primarily focused on preventing contamination of the potable water supply. Maintaining this minimum distance helps to minimize the risk of cross-connections and potential backflow situations that could occur if the sewer line were to leak or rupture.

Additionally, this spacing is in line with standard plumbing codes, which aim to ensure safe drinking water and sanitation. The requirement is based on experience and research regarding the behavior of wastewater and contaminants in soil and how they could potentially infiltrate the water service pipe if they were too close together. Proper installation and adherence to these standards are vital for public health and safety.