How To: Fracture and Bell-Splitting PVC Pipe Repair


How To Repair PVC Pipe Fracture

Most common cause of PVC pipe failures.

PVC pipe fracture is often caused by extreme stress on the pipe wall. PVC pipe is specifically designed with high pressure applications in mind. However, the stress that usually causes this type of tear is caused by human error. Dropping the pipe and breaking into pieces, for example. However, errors in the manufacturing process leave the pipe vulnerable to fracture in inherently weak spots as well. Weak spots are known as weak extrusion knit lines. Weak knit extrusion lines are the other cause of PVC pipe fracture. In extreme cases, the split will run down the entire length of the pipe. As long as the pipe does not curl up on itself, Tech-Patch repair is feasible. The Tech-Patch will serve to strengthen the weakened area of the pipe and provide a full high pressure seal along the crack. Tech-Patches are by far the only affordable full seal repair option for large PVC pipe fractures.

PVC Pipe Fracture

PVC Pipe Fracture Repair Steps:

1) Rough the PVC around the PVC fracture with sandpaper.
2) Drill a hole at each end of the crack so that internal pressure will not cause the crack to expand.
3) Clean with any cleaner that will not leave a residue. Dry thoroughly.
4) Spray the Activator/Accelerator (AA) on the prepped area. Let the AA dry.
5) Apply the SI Black to the Tech-Patch with continuous circles EXCEPT on diagonal corners. Paying special attention to having the adhesive reach the edges.
6) Grab the diagonal corners, apply tension.
7) Press the Tech-Patch to the fractured area on the PVC.
8) Use the glue squeegee to apply firm pressure to the Tech-Patch from the center out.
9) Bond the diagonal edges to the PVC with the SI Black. Spray with AA.
10) Apply a bead of the SI Black to the perimeter of the Tech-Patch. Spray with AA.
11) Visually inspect.

How To Repair Bell Splitting in PVC Pipe, Over-Belling PVC Pipe Repair

The second most common cause of PVC pipe cracks and breakdown; bell splitting or over belling.

Over belling is often caused as a result of an installation defect that leads to often catastrophic pipe failure. It occurs when the spigot is over inserted, causing direct contact with the PVC Bell. This process is very intricate and will fail when not done properly. Any contact between the bell and spigot, causes the bell to split. The area affected can be quite large and varies in size. Most bell/spigot joints occur on large diameter PVC pipes. Fortunately, Tech-Patches are available in custom sizes or bulk rolls, depending on your needs and/or frequency of use. Tech-Patches are the repair option for over-belling or bell splitting, as they provide a full seal and a custom fit for the different radiuses that occur along the pipe as a result of the over-stuffed spigot.

PVC Pipe Over-Belling

PVC Pipe Bell Splitting (Over-Belling) Repair Steps:

1) Rough the PVC around the PVC bell split with sandpaper.
2) Drill a hole at each end of the crack so that internal pressure will not cause the crack to expand.
3) Clean with any cleaner that will not leave a residue. Dry thoroughly.
4) Spray the Activator/Accelerator (AA) on the prepped area. Let the AA dry.
5) Apply the SI Black to the Tech-Patch with continuous circles EXCEPT on diagonal corners. Paying special attention to having the adhesive reach the edges.
6) Grab the diagonal corners, apply tension.
7) Press the Tech-Patch to the split over-belled area on the PVC.
8) Use the glue squeegee to apply firm pressure to the Tech-Patch from the center out.
9) Bond the diagonal edges to the PVC with the SI Black. Spray with AA.
10) Apply a bead of the SI Black to the perimeter of the Tech-Patch. Spray with AA.
11) Visually inspect.

Watch the video below to know how to apply your Tech-Patch. High Pressure Easy Leak Free PVC Pipe Repair:

Instructions for repairing a hole or crack in PVC pipe:

Step by step.


1) Rough the PVC around the problem area with sandpaper.
2) Drill a hole at each end of the crack so that internal pressure will not cause the crack to expand.
3) Clean with any cleaner that will not leave a residue. Dry thoroughly.
4) Spray the Activator/Accelerator (AA) on the prepped area. Let the AA dry.
5) Apply the SI Black to the Tech-Patch with continuous circles EXCEPT on diagonal corners. Paying special attention to having the adhesive reach the edges.
6) Grab the diagonal corners, apply tension.
7) Press the Tech-Patch to the problem area on the PVC.
8) Use the glue squeegee to apply firm pressure to the Tech-Patch from the center out.
9) Bond the diagonal edges to the PVC with the SI Black. Spray with AA.
10) Apply a bead of the SI Black to the perimeter of the Tech-Patch. Spray with AA.
11) Visually inspect.

If your problem is a crack, drill a hole at each end of the crack so that internal pressure will not cause the crack to expand. Your Tech-Patch is bonded onto the PVC and will not come off. Note: PVC is a co-polymer, but you do not need our patented Polymer Bonding Process in order to bond a Tech-Patch to the PVC.

If you have have questions, please call 877 565 7225.

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