Florida Home Inspector Practice Test

What type of valves are permitted to vent fixtures installed at island structures in kitchens?

1. Air-admittance valves

2. Standard vent valves

3. Pressure relief valves

4. None of the above

The correct answer is: Air-admittance valves

Air-admittance valves are specifically designed to allow air to enter the plumbing system without letting gases escape into the living space. This characteristic makes them particularly suitable for venting fixtures installed at island structures in kitchens where conventional venting through the roof may not be practical. In these scenarios, air-admittance valves provide the necessary ventilation for drainage systems while maintaining the integrity of the plumbing by preventing backflow of sewer gases. Their self-closing mechanism ensures that they function properly while responding to changes in air pressure within the drainage system, making them effective ventilation options for fixtures located in areas that lack direct access to traditional venting methods. Other types of valves mentioned, such as standard vent valves and pressure relief valves, are not designed for this specific application and do not serve the same purpose as air-admittance valves in the context of venting for island structures.