How to Use Pex Go-Nogo Gauge

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The PEX plumbing system is an innovative way of installing plumbing in residential and commercial applications. A combination of PEX fittings, crimp rings, PEX tubing and a PEX crimping tool are required during an installation. A Go/No-Go gauge is included with every crimping tool sold. It is a flat piece of metal with a few cut-outs on each side. One side is the “Go” side; the other side is the “No-Go” side. Use both sides to see if you crimped each fitting into place correctly.

Things You'll Need

  • PEX tubing
  • PEX fitting
  • PEX crimp ring
  • PEX crimping tool
  • Go/No-Go gauge

Place a crimp ring over the PEX tubing and insert a PEX fitting. Slide the crimp ring so it is 1/8-inch from the end of the tubing right next to the PEX fitting.

Use a PEX crimper to crimp the ring into place over the PEX tubing.

Slide the “Go” side of the gauge over the crimped ring. If the crimp was made correctly, the gauge will pass over the ring with not problems.

Turn the gauge over and try to pass the “No-Go” side of the gauge over the crimp ring. The crimp ring should be unable to enter the gauge at any point on the “No-Go” side of the gauge.

Cut the PEX fitting out and replace it with a new crimp ring and fitting if the crimp ring fails either test.

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