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Let Us Help You Learn To Glue PVC

Link To Piping Page

General Methodology to Gluing PVC and Fittings.
Step 1

Everything must be truly dry. There are glues that withstand some moisture but why take a chance?

Step 2

Dry run your fittings/pipe. This means don't prime/glue, just put things together to make sure you cut piping correctly and lengths are right. You do NOT have to fully engage piping because it will be hard to pull apart.

Step 3

So pipes and fitting are ready:



Step 4

When you can, I prefer CLEAR primer and glue. Just a lot cleaner. BUT... colored primer/glue allows you to make sure you cover all surfaces. I use Medium Body glue. Plus side is its heavier and therefore fills in voids. Downside is it sets FAST. So when you push two fittings together you have seconds before the glue starts setting.

Step 5

Clean all surfaces where the primer and glue will be used. If there are any burrs where you cut the pipe, file/sand the burrs off.

Step 6

The KEY to remember is you MUST prime all surfaces where the pipes will touch. You can prime/glue one surface and think when it touches the other it will adhere. It will not and you will have to cut out the failed joint and redo.

Step 7

So lay out what you are gluing together. You CAN primer all surfaces and leave them a short time. Priming both soften the plastic and cleans it. I typically prime and set the pipe/fittings aside prepared for gluing.

Step 8

Once you start gluing, don't stop. Its a matter of thinking how you are going to do the process. When pipes/fittings are properly primes and glued, they become a very strong connection. So think out a systematic approach to complicated applications and you will be fine. Sometimes I cut pipes further back to relieve pressure and then glue a coupling where I cut at the end. Doing so allow me more elbow room to install the new plumbing. Of course sometimes it just a fitting and pipe and that's easy.


REMEMBER: All surfaces that will attach to each other must be primed and glued. Make sure when you do both the complete surface is covered.


If you get into it and realize you goofed, immediately start pulling apart fittings you need to and clean with primer. Typically you can remove enough of the glue to save the part and start over.


Often I will put a second coat of glue over the gluing joint for insurance. My mechanical mind says that is not necessary but my heart says, why not? You don't prime again, just add a coat of glue after about 15mins after the first assembly.


Lastly, do you have to push the pipe/fitting completely into the joint? I asked that when I first started. My teacher said if you have a GOOD 1/2", it probably will be enough. Over the years I have shot for 1" into the fitting and of the thousands of glue joints I have done, I have only failed a handful of times.

NOTE: All glued fittings Use Standard PVC Primer and Glue.



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