What type of vent is used to provide additional ventilation between the drainage and vent systems?

Understand the Problem

The question is asking for the specific type of vent that is used to enhance ventilation within drainage and vent systems. It provides multiple choice options for the answer.

More Information

An air admittance valve (AAV) allows air to enter the plumbing system without using a vent pipe that exits through the roof. It's a mechanical device used where traditional venting is impractical.

Tips

Common mistakes include confusing air admittance valves with traditional vent pipes or vent stacks. Ensure understanding of when and where each is appropriate.

Sources

• Methods of Venting Plumbing Fixtures and Traps - Express Water Solutions - expresswatersolutions.com