What specific test is required for drainage systems after installation?

In accordance with the Massachusetts Plumbing Code, after the installation of drainage systems, a water test or an air test is mandated to ensure that the system is free from leaks. This testing process is critical because drainage systems are designed to transport wastewater away from a building safely and efficiently.

A water test typically involves filling the system with water to a specified height and observing for any drops in water level, which would indicate leaks. An air test, on the other hand, involves pressurizing the system with air and checking for any loss of pressure, which would suggest the presence of leaks. Both tests serve to verify the integrity of the installed drainage system before it is put into service, ensuring that it complies with health and sanitation standards.

The other options do not align with the requirements established by the Massachusetts Plumbing Code for testing drainage systems. A pressure test, while useful for certain systems, is not specifically indicated for drainage systems. Temperature tests and structural integrity tests are not standard protocols for evaluating drainage installations.