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Installing Pex Tubing in Concrete

Pex tubing is a cross-linked polyethylene. The cross-linking process makes the tubing stronger so it is tolerant to high heat and high pressure. The pex tubing is set into the concrete slab and circulates hot water, which provides heat to the room. Pex tubing is also used in greenhouses to keep plants warm. Pex is a flexible tubing that is joined to specially made fittings using a crimping tool. It is installed in long lengths as well as short spans, but for use in radiant heating it is placed under a concrete slab in coils like a snake.

Things You'll Need

  • Pex tubing
  • Oxygen barrier spray
  • Metal tubing anchors
  • Screws
  • Screw gun
  • Rebar rods
  • Tie wire
  • Concrete
  • Trowel
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Instructions

    • 1

      Take the Pex tubing and evenly place it as coils across the ground where you will pour your slab. Run it down one length, around the corner and back up the other side. Repeat this process until the ground is covered. Stay away from the edges of the room by 6 inches.

    • 2

      Spray an oxygen barrier on the Pex tubing to protect the heating system from getting any oxygen inside, which can cause deterioration.

    • 3

      Place a metal hose anchor over the tubing every 12 inches. The half-circle supports have flanges on both sides that screw into the ground to hold the tubing in place.

    • 4

      Place a metal rebar grid over the tubing. The rebar rods are placed in a way to form a checkerboard appearance over the slab area. Tie the rebar with tie wire at each intersection.

    • 5

      Pour your concrete over the ground to create your concrete slab. Cover the tubing completely.

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Landscaping Patios
  1. Do You Have to Seal a Concrete Floor Before Installing Carpet?
  2. Concrete Patio Preparation
  3. Patio Concrete Treatments
  4. How to Attach Pex Tubing to Rigid Foam Insulation
  5. Installing Concrete Treads With Rails
  6. The Options for Installing Hardwood Floors Over Concrete
  7. How to Pull PEX Through Holes in Ceiling Joists
  8. How to Run Pex Tubing to a Toilet
  9. Steps For Installing Carpet on a Concrete Slab
  10. How to Pour in Floor Heating Slabs
  11. Insulation & Installation of Pex Tubing in Concrete Slab
  12. Corian vs. Concrete

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