On a horizontal branch, what is the maximum distance from the fixture opening that a vent can be connected?

The maximum distance from the fixture opening that a vent can be connected on a horizontal branch is 2 feet. This standard ensures that the venting system adequately serves to equalize pressure in the drainage system and prevent the siphoning of water from traps, which could lead to gas infiltration or sewer backup.

In plumbing, proper venting is crucial as it allows air to enter the drainage system, which helps wastewater flow smoothly and prevents vacuums that could disrupt the system's operation. By limiting the distance to 2 feet, the code ensures that the vent is close enough to effectively handle the potential pressures and flows that originate from the fixture, thereby maintaining the system's integrity and functionality.

This distance is codified to balance practical installation requirements with the need for efficient waste and venting performance. As a result, ensuring that the venting remains within this limit is essential for compliance with the Omaha Plumbing Code and serves to protect the overall health and safety of the plumbing system.