SpudFiles

I have a problem finding a short piece of tubing/pipe/whatever to fit inside type L copper tube. I am building a 1/2" piston valve for relieving a 2" (1.5" Ported) main piston. It would have to be something that I can solder in place. I have turned a piston from oak and faced it with gasket rubber. The only stumbling block is the piston seat which must protrude halfway into a 1/2" copper tee. I've tried various plastic arrangements, but they all melt when I do final soldered assembly. Has anyone ever found the right size for this application?

acr copper in 1/2 in has a o.d of 1/2 in .50
1/2 m,l,and k have i.d of .569 ,.545 ,and .528 .
If you heat copper red hot it becomes soft enough to work.
as in swaging from .500 to the i.d. of the k,l,or m.

hope this helps

Thanks. I've found the perfect tube to fit inside that L type copper. It's a short 1/4"NPT brass nipple. I was able to chuck it up in a 1/2" chuck and minimally turn/file it down to make a perfect fit. After I soldered it with just the right protrusion, I bored it out bigger to handle more exhaust. It works really great. I fill the whole setup through the blowgun trigger. I have a male QC on the blowgun and just feed it backwards. It's very quick. Dry fires are LOUD even at 50lbs.