PVC Underground Drainage Pipe Installation

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PVC is a hard plastic used in the manufacture of household drainage (sewer) and vent lines. The pipe comes in a diameter range from 1 1/2 to 4 inches, and joins together with primer, cement and various angled PVC couplings. Underground sewer pipes run from either the city sewer pipe coming onto the property, or a private septic tank. The pipe then runs into the home's cellar/buildup area, where various size sewer pipes connect and travel to the property's water appliances.

Things You'll Need

  • Tape measure
  • Spade
  • Handsaw
  • Utility knife
  • PVC cement
  • PVC couplings
  • Mark the location and route where the home's main sewer line will run from the cellar/buildup area, to the sewer pipe coming from the city sewer line/septic tank. Dig a trench where the new main sewer line will run, making sure the depth of the trench complies with local building regulation requirements (make the trench 6 inches deeper than the depth that the pipe will be installed, for easier installation).

  • Clean around the outside end of the sewer pipe coming from the city sewer line/septic tank, using a damp rag. Measure and cut the first section of PVC sewer pipe to the desired length using a handsaw, circular saw or miter saw. Make the cut straight, and remove any burrs from the cut pipe end using a utility knife.

  • Apply PVC primer around the outside end of the city/septic sewer pipe, the inside of a PVC coupling and one outside end of the first section of PVC sewer pipe. Apply PVC cement to all primed areas. Push the coupling onto the end of the city/septic pipe, and then push the cemented end of the new PVC pipe section into the other end of the coupling. Hold the pipes to the coupling for 10 seconds while the cement sets.

  • Measure and cut the second PVC pipe section to length. Remove burrs. Prime one outside end of this pipe, the remaining end of the first pipe section, and the inside of a PVC coupling. Cement all three primed areas. Push the coupling onto the end of the first pipe section and the cemented end of the second pipe into the other end of the coupling. Hold in place for 10 seconds. Now measure, cut and cement in place all necessary PVC pipe sections until the cellar/buildup area is reached.

Tips & Warnings

  • All horizontal sections of PVC sewer pipe must be installed at a gradient for waste to travel along the pipe. Call the local building department for the correct gradient in your area.
  • Do not fill in the trench until the city inspector has approved the newly-installed sewer line.
  • Wear eye protection when cutting through the PVC pipe.

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References

  • Photo Credit Jupiterimages/Photos.com/Getty Images
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