Hydraulic traps are devices used in plumbing and drainage systems to prevent the backflow of gases and odors. They work by using water to create a seal that blocks unwanted substances from entering a space. This is essential in maintaining a clean and safe environment, especially in bathrooms and kitchens. These traps are commonly found in sinks, toilets, and floor drains. When water flows through the trap, it fills a curved section, forming a barrier. This design ensures that harmful gases, such as sewer gas, cannot escape into living areas, promoting better indoor air quality.