What is one characteristic of a waterless urinal?

• A. Requires water
• B. Requires power
• C. Uses no water
• D. Maintenance heavy

Answer: (C)

The main idea here is water conservation. A waterless urinal is designed so no water is used to flush urine away, which sets it apart from traditional flush urinals. Instead, it relies on a sealing mechanism or cartridge that blocks sewer gases and channels urine to the drain without a water flush. This is why the best choice is that it uses no water—the defining characteristic that distinguishes waterless models.

Some models may require periodic maintenance to replace the cartridge or maintain the odor seal, but that doesn’t change the fact that no water is used for flushing. The other options aren’t defining features: some units may have sensors and use power, but that isn’t what characterizes a waterless urinal; and saying maintenance is heavy isn’t a universal truth for these systems.