How many fixtures can typically be served by a single 2-inch vent pipe?

A single 2-inch vent pipe is generally capable of serving up to 10 fixtures, which is based on standard plumbing codes and practices. The size of the vent pipe is crucial because it needs to support the proper drainage and venting of all the connected fixtures. A 2-inch vent has sufficient capacity to handle the airflow required to prevent siphoning and maintain appropriate pressure within the drainage system.

Each fixture contributes to the total flow and venting requirements, and when planning the plumbing system, licensed plumbers will reference local building codes or national standards, which often provide guidelines for the maximum number of fixtures that can be served by various sizes of vent pipes. Choosing the correct vent pipe size and understanding its limits is essential to ensure proper performance of the plumbing system and to avoid issues such as slow drainage or sewer gas odors.