When ordering fittings such as tees or wyes, which outlet is listed last?

When ordering fittings like tees or wyes, the last outlet listed is the branch outlet. This format helps to establish a clear hierarchy of the fitting’s function within a plumbing or piping system. The main outlet, which is typically the largest, is listed first because it is the primary route for the system flow. The branch outlet, which connects to secondary piping, is designated last as it serves a supporting role to the main pipeline.

By clearly identifying the main and branch outlets, technicians ensure correct installation and prevent confusion during assembly or maintenance. The order reflects not only the physical connection but also the flow dynamics within the system, where the main outlet directs the primary flow and the branch allows for the diversion to other areas. This approach guarantees that everyone involved in the project is on the same page regarding the layout and functionality of the piping system.