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How to Join a PVC Pipe With a CPVC Pipe

2018-08-31

How to Join a PVC Pipe With a CPVC Pipe?


At first glance, PVC and CPVC pipe look the same, but they aren`t. Although they are both a type of plastic plumbing pipe, they vary in composition and outside diameter. For this reason, you cannot simply join the two types of plastic with a coupling. You can, however, solvent-weld a special fitting designed to compensate for the diameter difference. When solvent-welding PVC to CPVC, you`ll need a primer and adhesive that will soften both types of pipe.

Step 1

Prepare the pieces of the PVC-to-CPVC connection. Prime the first 2 inches of the exterior surface of the PVC and the CPVC pipes with the CPVC primer. Then prime the inside of the entire CPVC-to-PVC adapter. You will find the priming brush attached to the lid of the CPVC primer can.

Step 2

Immediately apply a light coating of CPVC glue to the primed area of the CPVC pipe and the side of the CPVC-to-PVC adapter.

Step 3

Slide the glued side of the CPVC adapter onto the glued end of the CPVC pipe and hold the adapter onto the end of the pipe for 30 seconds to bond the two pieces.

Step 4

Apply CPVC glue to the exterior of the primed end of the PVC pipe and the PVC side of the CPVC-to-PVC adapter.

Step 5

Insert the glued end of the PVC pipe into the glued open side of the adapter and hold for 30 seconds to complete the joining process.

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