What is the maximum distance a plumbing fixture can be placed from a vent stack?

The maximum distance a plumbing fixture can be placed from a vent stack is 10 feet. This measurement is critical because it ensures that fixtures are adequately vented, allowing for proper drainage and preventing sewer gases from entering the living space. Adequate venting is essential for maintaining the functionality of the drainage system, as it helps prevent siphoning of water from traps and contributes to the effective flow of wastewater.

When fixtures are too far from a vent stack, there's a risk of creating negative pressure within the drainage system, which can lead to issues such as slow drainage, gurgling sounds, or even drain backups. By keeping the fixture within 10 feet of a vent stack, the plumbing code ensures that there is sufficient airflow to maintain optimal drainage functionality. This regulation is part of the efforts to maintain safety and health standards in plumbing installations.