According to plumbing codes, how far can a vent be from the trap it serves?

In plumbing systems, the distance a vent can be from the trap it serves is crucial for maintaining proper drainage and preventing sewer gases from entering the living space. The correct answer of 2 feet aligns with the plumbing code that aims to ensure that the vent effectively allows air to enter the system, promoting proper flow and preventing potential siphoning of the trap.

When a trap is installed, it is vital that the vent remains close enough to counterbalance the pressure changes in the drainage system that can occur when water flows through. A distance of 2 feet is established as a standard to ensure that the venting is adequate to prevent drain siphoning and maintain the trap seal. This distance helps prevent issues like slow drainage and odors.

Longer distances, such as 4, 6, or 8 feet, could compromise the effectiveness of the vent, possibly leading to code violations and functional problems within the plumbing system. Keeping the vent within 2 feet of the trap ensures compliance with standard plumbing practices and safeguards the system's integrity.