Which of the following is crucial for preventing sewage odors in a plumbing system?

P-Traps play a vital role in preventing sewage odors in a plumbing system by acting as a barrier between the sewer system and the living space. P-Traps are U-shaped pipes typically located under sinks, tubs, and other drainage fixtures. When water flows through the trap, it fills the curved section, creating a seal that blocks gases from the sewer system from entering the home. This design is essential for maintaining indoor air quality and preventing unpleasant odors associated with sewer gases, such as methane and hydrogen sulfide.

While shut-off valves control water flow and backflow preventers protect potable water from contamination, they do not serve the specific function of blocking odors. Sump pumps remove water from basements and low-lying areas but do not address odors directly. In summary, P-Traps are specifically designed to trap water and maintain that essential seal against sewage gases, making them crucial for odor prevention in plumbing systems.