What is the maximum distance of vent to trap on a 2” plumbing line?

The maximum distance for a vent to be installed from a trap on a 2-inch plumbing line is indeed 60 inches. This specification is important for ensuring that proper air flow is maintained within the plumbing system, which helps to prevent the siphoning of the trap seal and allows for the effective drainage of waste while preventing sewer gases from entering the building.

The reason this distance is critical lies in the function of the venting system. Vents provide air to the drainage system, aiding in the smooth flow of wastewater. If the distance exceeds 60 inches, it may hinder the vent's ability to prevent the trap from being siphoned due to negative pressure created by the draining water. Thus, maintaining this distance helps to ensure proper operation of fixtures and enhances the overall performance of the plumbing system.

Understanding these principles is essential for plumbing design and code compliance, particularly for professionals involved in plumbing installation and maintenance.