Definition - What does Branch Sewer mean?
Branch sewers are an integral part of the municipal sewerage system that connects lateral sewer pipes from homes and offices along a street and empties it into the main sewers. This segregation of sewer lines makes it easier for rehabilitation work in case of blockages. Trenchless rehabilitation methods are being extensively used for the purpose of rehabilitating or repairing branch sewers through manholes. It is a major improvement over combined sewer system that catered to storm and sewer flow in a single sewer system.
Trenchlesspedia explains Branch Sewer
The branch sewer is larger in diameter and capacity than the lateral sewers that discharge into it. The sewer collection system consists of the following components. The lateral sewers are the pipes that collect wastewater from homes and offices. The branch sewers run under streets connecting to various laterals and joining the main sewer. The main sewer collect wastewater from different laterals and branch sewers and delivers it to a trunk sewer, which either carries the water to a treatment plant via gravity or to an interceptor sewer which is connected to a lift station or pump if needed to transport the wastewater to the treatment plant if it is located at a higher level than the gravity sewer network.