For which of the following fixtures are vents not required?

Vents are essential components in plumbing systems, as they allow air to enter the system, preventing pressure buildup and ensuring proper drainage. However, certain fixtures, like bars, soda fountains, and counters, are usually considered special installations where the water flow is minimal and where the fixtures are typically connected to a master venting system that serves multiple fixtures.

In commercial settings, specific equipment like soda fountains may utilize a design that relies more on gravity and has fewer complications regarding drainage. These systems can often discharge into a larger drain, which is vented elsewhere, eliminating the need for individual vents for each installed fixture. This reliance on larger venting systems is the basis for understanding why individual vents may not be absolutely necessary for these particular installations.

On the other hand, sinks, bathrooms, and showers usually experience greater water flow and waste disposal, making the need for individual vents more critical to ensure proper function without siphoning of traps or drainage issues.