The raised bead on a bead and crimp joint serves which primary purpose?

• A. stiffens the pipe and provides a stop.
• B. prevents water from leaking down the pipe.
• C. fits inside the next pipe to prevent leaks.
• D. is an adjustable draw band.

Answer: (A)

The raised bead mainly serves to stiffen the end of the pipe and act as a stop. That collar adds rigidity, helping the end resist bending and deformation when the joint is formed and handled. It also provides a physical limit so the next section can’t be pushed in too far, keeping the joint properly aligned. Sealing in a bead-and-crimp connection comes from the crimp and any seals used, not from the bead itself, and this joint isn’t about fitting inside the next pipe or using a draw band.