A trap should be placed near the fixture, but not exceed what distance from the bottom of the fixture to the dip of the seal?

The correct choice indicates that a trap should be placed no more than 10 inches from the bottom of the fixture to the dip of the seal. This requirement is crucial for maintaining proper drainage and preventing sewer gases from entering the living space, as well as ensuring that the trap retains enough water to effectively seal against odors.

The distance is specified in plumbing codes to ensure optimal performance of the trap. If the trap is located too far from the fixture, the water seal can evaporate, potentially leading to the loss of the trap’s sealing function. Thus, the 10-inch limit helps to secure a reliable performance of the plumbing system and maintain hygiene and safety within a building.

Understanding these nuances in plumbing design is essential for ensuring compliance with local codes and effective installation practices.