If a 2 inch area drain is connected to a properly vented sanitary building drain, what is the maximum distance allowed between the building and the trap before a vent is required?

The maximum distance allowed between the building's trap and the vent in the case of a 2-inch area drain connected to a properly vented sanitary building drain is 16 feet.

This is based on plumbing codes and standards that dictate how far a trap can be from the vent without losing its effectiveness in preventing sewer gases from entering the building. If the distance exceeds 16 feet, a vent becomes essential to ensure proper air circulation and drainage functionality. This regulation helps maintain the system's integrity, ensuring that there is an adequate flow of air to prevent siphoning of the trap, which could otherwise lead to unpleasant odors or potential health hazards.