What is the minimum required height for the termination of a plumbing vent if it is less than 3 feet horizontally from a window?

The minimum required height for the termination of a plumbing vent when it is located less than 3 feet horizontally from a window is 3 feet. This requirement is established to prevent the potential for sewer gases to enter the home through open windows, thereby safeguarding the indoor air quality. By ensuring that the vent termination is elevated at least to this height, local building codes aim to create a buffer that reduces the likelihood of contamination from plumbing vent emissions. The specified distance also takes into account potential wind patterns and the flow of air, ensuring that odors and gases are dissipated safely away from living spaces.

Other height options may not provide sufficient clearance to meet safety standards, which is why the 3-foot height is deemed the minimum necessary for effective ventilation near openings like windows.