What is the maximum developed distance from fixture to trap weir?

The maximum developed distance from a fixture to the trap weir is set at 24 inches according to the Massachusetts Plumbing Code. This measurement is crucial for maintaining proper drainage and preventing issues such as siphoning or improper drainage, which could lead to clogs or backflow. The limit is designed to ensure that the water flowing from the fixture can effectively reach the trap, allowing it to function properly and maintain a water seal that prevents sewer gases from entering the building.

By keeping the distance to a maximum of 24 inches, the code emphasizes the need for efficient waste removal and minimizes the risk of air locks or drainage failures. This specification also assists plumbers in designing systems that adhere to best practices for plumbing efficiency and safety, ensuring that the fixtures are properly vented and able to handle the flow of wastewater.