What is the pressurized line called that leaves a lift station?

The pressurized line that leaves a lift station is referred to as a force main. This terminology is used because the force main is designed to carry sewage or wastewater away from the lift station under pressure. This pressure is necessary to transport the wastewater through the system, especially when it needs to overcome elevation changes or other resistance in the pipeline.

In wastewater management systems, lift stations are employed to move sewage from lower to higher elevations or to pump wastewater long distances. The force main is crucial in ensuring that the waste can be moved effectively to its next destination, whether it is a treatment facility or another point in the system. It is important to use the correct terminology since force mains are specifically designed to handle the pressures associated with pumped flows, which differentiates them from other types of pipelines that may not operate under pressure.

The other terms listed, such as pressure line, outflow line, and lift line, do not accurately define the specific function and design of the pipe that transports wastewater under pressure away from a lift station. This distinction is key in the field of wastewater management and is why "force main" is the accepted and correct designation.