How to Put in the Cap for a PVC Pipe

Updated July 20, 2017

PVC tubing is used in household plumbing applications. Drains, vents and drain tiles can all be made from PVC tubing. PVC tubing is connected together by using a special glue called PVC cement. The PVC cement is applied to both the male and female ends of the sections to be connected, then the pieces are inserted into each other. The glue reacts with the tubing and melts the sections together to make a solid bond. If desired, the end of a PVC tube can be closed off by installing a cap.

Use the tape measure and marking pen to measure and mark a line on the PCV tube you want to cut.

Use the hacksaw to cut the PVC pipe at the line you marked. Cut as straight as possible.

Use the sandpaper to smooth out the frayed edges of the pipe you cut.

Dry-fit the PVC cap on top of the tube. Push down on the cap until it is bottomed out. Use the marking pen to make a line on the tube where the cap bottoms out. Remove the cap from the tube.

Apply PVC primer to the outside diameter of the PVC tube from the mark you made in Step 4 towards the end of the tube. Apply PVC primer to the inside diameter of the PVC cap. Wait until the primer is dry to the touch. This should take approximately 30 seconds to one minute.

Apply PVC cement to the inside of the cap, as well as the primed area on the tube. Push the cap on top of the tube until it bottoms out, then give it a quarter-turn twist to spread the glue. Keep applying pressure to the cap for approximately 30 seconds to ensure it does not move while the glue sets. The joint will be fully cured in 24 hours.


If possible, use a specially made PVC tubing cutter to get the straightest, cleanest cut.


PVC primer is a purple liquid that stains objects easily. Be careful while applying it to avoid splashes and staining the area surrounding the PVC pipe.

Things You'll Need

  • PVC tubing
  • PVC cap
  • Measuring tape
  • Marking pen
  • Hacksaw
  • Sandpaper
  • PVC primer
  • PVC cement
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About the Author

Emrah Oruc is a general contractor, freelance writer and former race-car mechanic who has written professionally since 2000. He has been published in "The Family Handyman" magazine and has experience as a consultant developing and delivering end-user training. Oruc holds a Bachelor of Arts in political science and a minor in economics from the University of Delaware.