What is the maximum developed length for an indirect waste to any sanitary waste line?

• A. 3 feet
• B. 5 feet
• C. 7 feet
• D. 10 feet

Answer: (B)

Indirect waste must discharge into a receptor within a short distance from the fixture’s trap to ensure proper venting and to prevent siphoning of the trap seal. The maximum developed length allowed from the trap discharge to the indirect waste receptor is five feet. Staying within this limit helps keep the drainage predictable and reduces the chance of backflow or odor issues. A length of three feet would be acceptable but not the maximum, while seven or ten feet would exceed the limit and would not meet code requirements.