How many vents can each relief vent serve when venting laboratory sinks?

When venting laboratory sinks, each relief vent is permitted to serve a maximum of five fixtures. This regulation is designed to ensure adequate venting for multiple fixtures, which is essential for maintaining proper drainage and preventing trap siphoning.

Proper venting helps to equalize pressure within the drainage system, which is particularly important in laboratory settings due to the variety of substances that may be introduced into the sinks. By allowing each relief vent to serve up to five sinks, the plumbing system can efficiently manage airflow and maintain the functionality of the traps, preventing issues such as odors, slow drainage, or potential backflow.

Understanding this specification of the Massachusetts Plumbing Code is critical for ensuring compliance with regulations aimed at protecting both the plumbing infrastructure and health and safety standards in laboratory environments.