What type of valves are ARVs?

Air release valves (ARVs) are specifically designed to allow air to escape from a pipeline, particularly when the water flow changes. These valves play a crucial role in preventing air pockets from forming in the water system, which can cause disruptions in flow or pressure fluctuations. By effectively venting air, they help maintain the efficiency and safety of the water distribution system.

In contrast, other types of valves present in the choices do not perform the same function. Automatic regulation valves are designed to maintain a certain flow or pressure automatically, but they do not specifically deal with air release. Auxiliary release valves generally refer to additional valves that might assist in some secondary function, and adjustable pressure valves are used to control and modify the pressure in the pipeline but are not focused on air release. The function of ARVs is distinct and essential for maintaining the integrity of systems that transport fluids.