If gas piping is concealed in a wall, which fitting is commonly used to create a branch?

• A. Elbow
• B. Coupling
• C. Valve
• D. Tee

Answer: (D)

When you need a branch off a main gas line, you use a fitting that has three ports. A tee fitting provides exactly that: one inlet, a main outlet, and a branch outlet. This lets you tap into the run to feed another line without changing the direction of the main path. In a wall, a tee allows the extra line to be added cleanly while keeping the main run continuous. An elbow only changes direction of a single run, a coupling joins two pipes in line, and a valve is for shutting off or regulating flow. So, for creating a branch from a concealed gas pipe, the tee is the appropriate choice.