What is the standard length of a vent stack in most residential systems?

In residential plumbing systems, the standard requirement for the height of a vent stack is that it must be at least 10 feet above the roofline. This height is crucial because it ensures that the vent will effectively carry harmful gases and odors away from the building while preventing them from re-entering through windows or other openings. Additionally, the height requirement helps to maintain proper airflow and ventilation within the plumbing system, which is essential for its optimal functioning. Adhering to this standard contributes to the safety and efficiency of the plumbing infrastructure, making it critical for proper installation practices in any residential setting.