What is the required method for testing all waste and vent piping?

The required method for testing all waste and vent piping involves using a 10' head of water. This method is specifically designed to check for leaks and ensure that the waste and vent systems are properly sealed and functioning effectively. The use of water allows for a straightforward and reliable means of verifying that the installed piping is sound and that there are no leaks that could lead to issues such as sewer gas infiltration or waste drainage problems.

Employing a water column of 10 feet provides sufficient pressure to evaluate the integrity of the system while adhering to standard plumbing practices. This approach is also consistent with plumbing codes that emphasize the need for thorough testing of waste and vent systems post-installation.