• In this video, This Old House plumbing and heating expert Richard Trethewey explains how to work with PEX piping.


    1 Use PEX to run main cold-water feed into house.
    2 Connect cold-water feed to manifold.
    3 Run separate cold-water lines out from manifold to various fixtures.
    4 Run PEX hot-water feed from water heater to manifold.
    5 Run separate hot-water lines out from manifold to various fixtures.
    6 Use flaring tool to attach fitting onto end of PEX piping.
    7 Thread PEX fitting onto manifold and tighten with preset torque wrench.
    • Difficulty: Hard
      This is a job best left to the pros

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      Video Directory

      Selected Topic/Section

      Tools List

      • torque wrench
        Preset torque wrench
        used to tighten fittings onto the manifold
      • shears
        used to cut pex piping

      Shopping List

      1. PEX (cross-linked polyethylene) piping

      2. Assorted PEX fittings

      3. Manifold,
      used to distribute piping circuits