What is the maximum allowable distance for a fixture trap from the fixture served?

The maximum allowable distance for a fixture trap from the fixture served is 30 inches. This requirement is in place to ensure proper drainage and prevent issues such as siphoning or backflow, which could occur if the distance exceeds the specified limit. When the trap is located too far from the fixture, the water seal in the trap may be compromised, leading to potential odors and sewer gases escaping into the living space.

The code sets this distance as a standard to maintain effective waste removal and plumbing system efficiency. Furthermore, positioning the trap within this limit facilitates easier access for cleaning and maintenance, which is crucial for long-term plumbing functionality. Adhering to this guideline is essential for ensuring that plumbing installations are safe and effective.