What types of fixtures require venting?

Venting is crucial for all plumbing fixtures because it ensures proper drainage and maintains the balance of air pressure within the plumbing system. By providing a pathway for air to enter the drainage system, vents prevent the creation of vacuum conditions that can hinder water flow and drainage.

When any plumbing fixture, such as sinks, toilets, bathtubs, or showers, is used, water moves through the pipes, which can displace air and create negative pressure. Without proper venting, this negative pressure can lead to slow drainage, gurgling sounds, and even sewer gas odors entering living spaces. Therefore, all fixtures require appropriate venting to function correctly and maintain sanitary conditions.