Which component is used to seal the end of a pipe and prevent debris from entering?

• A. Flange
• B. Tee
• C. Caps
• D. Vent

Answer: (C)

When you need to close off the end of a pipe to keep debris from entering, a cap is the right choice. A cap fits over or into the pipe end and closes the opening, creating a sealed stop that blocks dust, moisture, and other contaminants from getting inside. Caps are designed specifically for terminating a line, whether threaded or slip-on, and are used when the pipe is not in service or is being stored or tested. In contrast, a flange is used to bolt together pipe sections, a tee adds a branch to the line, and a vent is meant to allow air or gas to escape or enter; none of these serves the purpose of permanently sealing the pipe end against debris.