What is a common use of a vent stack in a plumbing system?

A vent stack plays a crucial role in a plumbing system by regulating air pressure. Its primary function is to allow air to enter the plumbing system to maintain atmospheric pressure, which is essential for the proper flow of wastewater through the pipes. By preventing a vacuum from forming in the drain lines, the vent stack ensures that the water can flow freely, allowing sewage to exit the home efficiently.

Furthermore, without proper venting, negative pressure can lead to slow drainage, gurgling noises, and potential backups. Thus, the vent stack is vital in maintaining balance and ensuring smooth operation within the plumbing systems.