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Install New PEX Plumbing — Gather Tools and Materials

Beginner2 hours

Part of project

How to Cut and Crimp PEX Tubing Like a Pro · Step 1 of 6

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In this video

With the old, damaged pipes removed, install the new PEX tubing. Start by attaching a threaded PEX adapter to the existing galvanized pipe. Measure and cut the PEX tubing to the required lengths. Assemble the new lines using PEX fittings, such as T-fittings and elbows, to match the original plumbing configuration. Slide a PEX crimp ring over the pipe, insert the fitting, position the ring correctly, and use a PEX crimping tool to secure each connection.

Goal: Replace old plumbing with new PEX tubing

  • Ensure the PEX crimp ring is positioned 1/8 to 1/4 inch from the end of the pipe before crimping for a secure seal.

Used in this video

  • PEX Crimping Tool (Tool Type: Crimping Tool, Crimping Tool Size: 3/4 inch)Securing the PEX crimp rings over the fittings to create a watertight seal.
  • PEX Cutter (Tool Type: Pipe Cutter, Material Compatibility: PEX)Making clean, straight cuts on the PEX tubing.
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FAQs

Why is using a go/no-go gauge so critical after crimping PEX, and what does it tell me?

The go/no-go gauge is essential for ensuring your crimp connection meets industry standards and is leak-proof. The 'go' side should fit over the crimp ring, and the 'no-go' side should not. This confirms your crimp is properly sized and secure, preventing costly leaks down the line.

What are the most common mistakes beginners make when crimping PEX tubing, and how can I avoid them?

Common mistakes include not cutting the tubing squarely, placing the crimp ring too far from the end of the tubing, or failing to use the go/no-go gauge. To avoid these, ensure clean, square cuts, position the crimp ring about 1/8 inch from the end of the tubing and over the barb, and always verify your crimp with the gauge.

The materials list both PEX-A and PEX-B tubing. Does the type of PEX tubing (A or B) affect how I use copper crimp rings?

While copper crimp rings primarily use barbed fittings that are compatible with PEX-B and PEX-C, they can also be used with PEX-A tubing. The crimping method itself remains the same for all PEX types when using barbed fittings and copper crimp rings, but PEX-A is also commonly used with expansion fittings.

How accurate is the 'beginner' difficulty rating for this project, and what's a realistic time estimate for a first-timer to get a good crimp?

The 'beginner' rating is accurate as the steps are straightforward once understood, but practice is key. For a first-timer, expect each connection to take 10-15 minutes initially as you get familiar with tool handling and positioning. With a few successful crimps, your speed and confidence will quickly increase.

Transcript
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okay so finally I was able to get some parts and I can start putting these runs of pecs together so I just got the first one done and now I'm about to make my way and do the next one so I'll show you guys all right so I just got this one in this was where I had put this PVC cap so I got my pecs fitting here got it already crimped and should be good so we'll work our way down that way all right we got our this is the other end of that line that we were just looking at so we're going to put our three-quarter tea here because it's got to connect to that eventually and then it's going to go that way to get to the rest of the house this uh I could not find the right piece you just can't find parts anywhere so I had to because this is three-quarter pipe that's a half-inch pipe so I needed just a special pecs fitting and you just can't find them anywhere so I had to get a half-inch to three-quarter that's a female just a female reducer and it goes up to three-quarter and I just had to put a three-quarter male pecs fitting on this end so it's a little bit Frankenstein but not too bad and I've got the tea in place so yeah now we just need to turn the water on and make sure nothing's leaking so I also forgot to give

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