How to Support PVC Pipe


Easily cut and installed, Polyvinyl Chloride (PVC) pipe is well-suited to most plumbing situations. For PVC pipe to perform properly for many years, you need to provide support for the pipe. The amount of support required for PVC pipe is related to the use of the plumbing system. Extreme temperature ranges require more support than temperate plumbing systems. For example, a hot water supply line would require more support than a PVC waste line that carries moderate amounts of water that is fairly close to the ambient air temperature surrounding the waste pipe.

Things You'll Need

  • PVC pipe support chart
  • Permanent marker
  • Tape measure
  • Roll of perforated hanger strapping
  • Aviation snips
  • #2 Phillips head adapter
  • Screw gun
  • Two-inch wood screws
  • 24-inch plumber's level
  • Self-locking pliers
  • 5/16-inch hex head adapter
  • #10 self-tapping screws
  • Reference the PVC pipe support chart to determine the support required for your specific plumbing installation.

  • Mark the location of the first PVC support with the permanent marker. The first support needs to be at the first 90-degree horizontal elbow near a vertical PVC riser.

  • Measure the first hanger mark with the tape measure and mark the distance specified by the PVC pipe support chart with the permanent marker. Repeat this step to mark the location of each PVC support.

  • Measure the distance from the bottom of the nearest structural member located above the PVC pipe to the bottom of the PVC pipe. Add to that length two inches to extend beyond the bottom of the structural member and one and a half times the circumference (Diameter times Pi times 1.5) of the PVC pipe.

  • Unroll a section of perforated hanger strap and cut the hanger strap to the length you figured in Step 4 with the aviation snips.

  • Insert the #2 Phillips head adapter into the screw gun, hold the top of the hanger strap two inches past the bottom of the structural member and secure the perforated hanger strap to the structural member by running a two-inch wood screw through one of the holes in the hanger strap.

  • Place the 24-inch level on top of the PVC pipe, pull the hanger strap around the PVC pipe and hold the hanger strap in place by locking the two pieces of hanger strap together with the self-locking pliers.

  • Exchange the #2 Phillips head adapter inserted in the screw gun for the 5/16-inch hex head adapter and run a #10 self-tapping screw through the overlapping hanger strap to hold the PVC pipe. Do not secure the hanger strap tightly to the PVC pipe, as you need to allow room for the PVC pipe to move.

  • Remove the self-locking pliers from the secured hanger strap and repeat the procedure at each location you need to place a support for the PVC pipe.

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