Which statement about tees is correct?

• A. It changes the flow path at a 90-degree angle.
• B. It can only connect two pipes.
• C. It can split or combine flow.
• D. It cannot be used in vertical runs.

Answer: (C)

Tees are three-port pipe fittings that create a junction for branching. They are designed to split one flow into two paths or to combine two streams into one. That branching/merging capability is what defines a tee and makes it useful for routing fluid to multiple branches or joining lines. While the branch is typically oriented at 90 degrees to the main run and tees can be used in horizontal or vertical layouts, the essential idea is the ability to split or join flows.