What is the maximum length of a vertical vent in a plumbing system?

The maximum length of a vertical vent in a plumbing system is typically determined by plumbing codes, which are designed to ensure proper ventilation and function of the drainage system. In general practice, the maximum length a vertical vent can extend from the top of the branch is 10 feet. This guideline is in place to ensure that the vent can effectively release gases and maintain proper pressure equilibrium within the drainage system.

Additionally, if a vent were to exceed this length, it might not perform adequately, resulting in potential issues such as siphoning of traps or insufficient air supply to the drainage system. Therefore, maintaining this maximum length helps prevent such plumbing issues and ensures the system operates safely and efficiently.