On Jan 17, 4:43*pm, "RogerN" wrote:
Metalworking, resizing copper tubing-

Trying to install a valve on the copper tube going to the toilet tank. *The
original line is 5/8 copper tube going straight to the toilet tank valve.

So I cut off the tubing and tried to install a valve. *Turns out the 5/8"
tubing is a little larger than 5/8", the original tubing was too big for the
compression nut and ring.

I measured the tubing and reads around .655", about .030" too big. *I was
able to taper the end of the copper and hammer the compression nut onto the
tubing, this "sized" the tubing enough to get the compression sleeve on and
I got the valve on the line, but I would like to fix it better later.

I could either shrink the tubing down to .625" or expand to solder a
correctly sized tubing inside the end of the old tubing.
Are there any sizing dies or collet compression tools to shrink the tubing
to size?
Any reasonably priced tubing expanding tools to expand the end of the
original tubing to accept a piece of 5/8" tubing to be soldered in?

Thanks!

RogerN

What kind of compression fitting? I remember a few shutoff valves
that used a special chromed brass or copper tube that had a flange at
one end that mated up with a special nipple, had a flat plastic washer
between the tube and the valve and a nut that went over the top to
make the connection. The other end telescoped into the ballcock and
was secured with a plastic compression washer and nut. Don't know if
that tubing was a standard size or not, it was usually bought as an
assembly with all hardware at the same time as a new ballcock.
Haven't messed with any of that sort for ages. Plastic flex lines
going to a ball valve for shutoff last a lot longer and a whole lot
easier to replace. Ditto with the new-style all-plastic ballcocks.
That special shutoff valve either leaked or froze up when it was time
to do shutoff duty and had to be replaced anyway. Sometimes messing
around with the old plumbing stuff just isn't worth the time
invested. I've been scrapping the old stuff as and when I find it.

Stan