I'm trying to be creative and fabricate something. I would like to attach white PEX tubing to a CPVC fitting. I'm looking for an adhesive to make a mechanically solid joint (so it will hold a few pounds at least, it doesn't have to be waterproof or hold under hydraulic pressure, it's not that type of application.

I'm thinking epoxy because I don't know how the pex will respond to typical pipe adhesives that fuse the plastic. Any ideas?



Edited 1 time(s). Last edit at 05/15/2015 10:03AM by John E Powell.

Epoxy won't bond well to some plastics. I know there are "universal" type PVC cements that might bond to PEX. I'd look at one of those, first.

.................

John,

You might try Devcon Plastic Welder. It is a two part plastic epoxy, (?), and works very well on plastics. I used it to repair some stripped out screw holes on my trolling motor then drilled them out to accept new screws. They have been holding solid for 3 years now. It is waterproof and rock solid after it's setup

Don Campbell
don@sensorfishingrods.com

John;
You wont find a glue that will satisfactorily attach the two;

PVC= poly(vinyl chloride) plastic reacts with solvent types glues and as such is held together that way.

PEX= (or crosslinked polyethylene) is an inert type of material that does not react with Solvent type glues or any glue for that mater and is there for held together with crimp/compression type fittings. The only way the use those two materials will be to go to a Plumbing supply house (or maybe Big Box hardware store) and purchase an adapter type fitting designed to accomplish that transition. one side of that fitting will be a glue or threaded connection the other designed to crimp with the Pex.

Try 3M's DP-8005.

Russ in Hollywood, FL.

I'm sure there is an adhesive solution to this. Just keep experimenting until you find it. [groups.google.com]