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How to Run Pex Plumbing

Cross-linked polyethylene, or PEX, is a type of plastic pipe that may be used with potable water systems. PEX is used in residential and commercial structures with both hot and cold water lines. To run PEX plumbing requires two main processes, crimping and clamping. Crimping a pipe refers to the connection of different pieces and valves, while clamping refers to securing the pipe to the wall or ceiling. By mastering both processes, you will be able to run PEX to any room in the house.

Things You'll Need

  • Various PEX fittings
  • Copper or steel PEX crimp rings
  • PEX crimping tool
  • Tape measure
  • Marker
  • PEX pipe clamps
  • Nails
  • Hammer
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Instructions

  1. Connecting PEX pipe and fittings

    • 1

      Select the fitting you want to use. A coupler will extend the reach of a pipe by connecting twp pieces of PEX. You can also choose to attach valves or other fittings that are specifically designed for use with PEX pipe. Use 90-degree fittings to change the direction of the pipe.

    • 2

      Place a copper or steel crimp ring over the end of the pipe.

    • 3

      Place the chosen fitting into the open end of a section of PEX pipe. Push the fitting all the way into the pipe, and then pull the fitting out about 1/8 inch.

    • 4

      Open the crimp tool all the way and place the jams around the crimp ring. Close the tool until you hear it snap. The snapping noise means the connection is complete.

    • 5

      Place the PEX gauge over the crimp ring. If the gauge fits around the ring, the connection is watertight and complete. If the ring does not fit entirely inside the gauge, cut the PEX pipe just below the fitting and refit the connection using a new crimp ring. Continue making the desired connections until you reach your final fitting.

    Securing the PEX pipe

    • 6

      Lay a tape measure along the installed PEX pipe and make a small mark with a marker every 10 feet.

    • 7

      Place a PEX pipe clamp around the pipe at every location where you made a mark.

    • 8

      Place the two flat sides of the clamp flush against a solid surface, such as a wood stud or a ceiling joist.

    • 9

      Tap a nail into each of the small holes on the flat surface of the clamp using a hammer. This will hold the pipe in place against the solid surface. Anchored pipes produce less noise and will not bang against the wall due to surging pressure.