Hands-On Plumbing Practice

Req 6c — PEX Connections

6c.
Cut PEX pipe; make at least one connection using either a quick-connect fitting or a crimp fitting (using specialized tools).

PEX changed home plumbing because it is flexible, fast to route, and compatible with several connection systems. This requirement gives you practice with a material that many modern plumbers use every day.

🎬 Video: How To Cut And Crimp Pex - From A Professional (video) — https://youtu.be/vpnp3RayEPI?si=iieOezZIhF4ePAB-

How To Cut And Crimp Pex - From A Professional (video)

What makes PEX different

Unlike rigid copper or PVC, PEX can bend around corners and snake through framing with fewer fittings. That can speed installation and reduce the number of joints hidden inside walls.

Making the cut

Use a PEX cutter so the end is clean and square. A ragged or angled cut may keep the tubing from sealing correctly.

Two common connection styles

Quick-connect fitting

A quick-connect fitting grips the tubing when it is pushed fully into place. It is convenient, but the tubing still has to be cut cleanly and inserted all the way.

Crimp fitting

A crimp fitting uses a ring and a specialized crimp tool. The tool compresses the ring around the tubing and fitting to make the seal.

PEX Success Habits

Small details matter
  • Cut square so the tubing seats correctly.
  • Use the correct ring or fitting style for the system you are demonstrating.
  • Fully insert the tubing before crimping or locking the connection.
  • Inspect the finished joint instead of assuming it is good.
Close-up of a Scout and adult making a PEX connection with labeled tubing cutter, crimp ring, fitting, and crimp tool

You have now practiced two very different joining methods. Next comes one of the most traditional plumbing skills: soldering copper with a torch.