What is the main function of vents in a plumbing system?

The main function of vents in a plumbing system is to allow air pressure equalization. Vents are essential for ensuring that air can enter and leave the plumbing system, which helps maintain proper pressure within the pipes. When water drains through the system, it can create a vacuum that may impede the flow of water and waste; vents prevent this by allowing air to fill the space, enabling smooth drainage and preventing potential blockages.

In addition to facilitating the flow of wastewater, vents also help to prevent sewer gases from entering the living space, thus enhancing indoor air quality. Proper venting is critical for the overall functionality of the plumbing system, as it supports efficient drainage and ensures the safe and effective removal of wastewater.