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How to Install Underground Pipe For Irrigation System

This page outlines the minimum requirements,  along with tips and tricks, for installing the pipes, tubes, and wires for your new irrigation system.  Summary of major points:

  • Wet areas to be trenched a couple days in advance.
  • Consider hiring someone to dig the trenches.
  • Install mainline pipes 18 inches deep.
  • Install lateral pipes 8 to 12 inches deep.
  • Make provisions for winterizing the system in cold winter climates.
  • Use proper methods for gluing PVC fittings to prevent future leaks.
  • Use good quality fittings for PEX.
  • Don’t forget to install wires in the trenches!
  • Sleeve the wires if you have aggressive critters.

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