What distinguishes a sanitary drain from a storm drain?

A sanitary drain is specifically designed to remove wastewater from various plumbing fixtures, such as sinks, toilets, and showers. This system is crucial for transporting sewage and graywater safely away from buildings and into treatment facilities. The primary purpose of a sanitary drainage system is to ensure sanitary conditions by properly managing waste fluids, therefore protecting public health and the environment.

Storm drains, in contrast, are engineered to manage excess rainwater and surface runoff, which helps prevent flooding and water accumulation in urban areas. They are not intended for carrying sewage or wastewater and usually discharge into natural water bodies or stormwater management systems.

The distinction between sanitary and storm drains is significant in plumbing and civil engineering, as mixing these systems can lead to public health risks, environmental contamination, and regulatory violations. Understanding this difference assists professionals in properly designing and maintaining each type of drainage system according to intended use and safety standards.