What are the large pipes that convey significant quantities of water for distribution to smaller mains called?

The large pipes that convey significant quantities of water for distribution to smaller mains are referred to as primary feeders. These pipes play a crucial role in a water distribution system by delivering water at high capacities from a water source or treatment facility to various areas within the system. Primary feeders are designed to carry large volumes of water and usually operate at higher pressures compared to smaller lines. This ensures that there is adequate water flow and pressure available for further distribution to smaller mains and service connections.

In the context of water supply systems, primary feeders are essential for maintaining an efficient and reliable flow of water, especially in urban areas where water demand can fluctuate significantly. Their ability to handle large amounts of water makes them a foundational component of any effective municipal water distribution network.