What is the maximum horizontal distance for the outlet of a laundry tray from the standpipe trap?

• A. 24 inches
• B. 30 inches
• C. 36 inches
• D. 42 inches

Answer: (B)

The maximum horizontal distance for the outlet of a laundry tray from the standpipe trap is specified as 30 inches. This requirement is in place to ensure proper drainage and to minimize the risk of siphoning or backflow, which can lead to clogs or other plumbing issues. Ensuring that the outlet does not exceed 30 inches helps maintain the necessary water seal in the trap while allowing for effective drainage of wastewater from the laundry tray. This distance is crucial for maintaining fluid dynamics within the plumbing system and supports proper ventilation, which is necessary for waste carrying systems.

Taking into account the context of plumbing codes, these specifications are designed to provide practical guidelines ensuring the efficiency and safety of plumbing installations in residential settings.