SpudFiles

I'm building my first pneumatic gun (4" x 24" chamber, 2" x 48" barrel, 1" sprinkler valve) and I screwed up one of my fittings. The 2" to 1" bushing stopped about 2/3 of the way into the 4" to 2" reducer. I tried twisting, hammering, swearing, but it would not seat any deeper.

Is there any way to remove it? The Wile E. Coyote method would be to pump it up and hope it pops loose.

It seems to me that you may have used a pressure fitting with a DWV fitting. That, or that is as far as these fittings will go, due to manufacturer error. If you glued it correctly, the best way to remove it is not to. Buy some new pieces and try again.

Unfortunately, no. Theoretically, the two pieces of pipe are welded together and are now one pipe. The best thing to try would be to try and twist them apart somehow, but if you did a good job they're pretty much stuck like that forever.

umm i think you're pretty much screwed as far as trying to remove it, to secure it better you could always use small machine screws on each 90 degree and screw the thing together so that it doesn't seperate, or go and spend the money to replace the fittings. your call

This must have been a popular question: Three responses at the same time!

If you have the time, cut the pipe at the fitting, get a dremmel and sand the glued pipe out. Or if you have a lathe just bore it out.

I did the first method, it was alright, but it took a long time and my hand hurt afterwards... Also you risk damaging the fitting and making it unsafe because i think they taper in a little the further into the fitting you go. So i would guest buying a new pipe.

just buy new fittings.

Do nothing, as this is how DWV reducers work! Only use it for a combustion, and you'll be fine, no need for anything new.

Geeze, your swearing must be defective! Mine works every time!

Seriously though, just buy some new fittings. They don't cost much, and you can make sure all of them fit before you buy them!

Pilgrimman wrote:Geeze, your swearing must be defective! Mine works every time!

Agreed - swear harder!

my first post guys
to seperete them you can use a heat gun and gently heat around the join and twist once the glue has released keep twisting
i have done this many times
but i have never done it for a cannon so the saftey side of things i dont know
hope that helps

i dont think this will work as pipe is solvent welded together so the 2 pieces become 1, and you cant twist them apart

yes they do become welded but the heat causes a reaction and they seperate
but like i pointed out saftey side of things i dont know wat it would do
wen you heatit do it slowly and carefully as not to burn the pipe but it will become very soft
its good for saving fittings but not the best for keeping pipe
i also stab the inner pipe once heated and twist that to getit off
takes awhile but it does work
got shown this by An old plumber who was lets say to cheap to by new stuff

I tried the chiseling method today, and it works but I dont think it is safe to do because the pipe comes out fine but it is very easy to damage the part of the fitting that stops the pipe from going all the way though. The side walls of the fitting appeared to be fine but I still don't trust it. Just get a new fitting, pvc fittings are very cheap at lowes and home depot, usually around 60 cents maybe $1.30 for larger fittings, except anything above 2 inch can be $3-5.

i agree buy new ones
still there is the heat option