"Toller" wrote in message

Seems to me that copper ought to have enough flex to accomodate moving
1.5" over a length of 3', but I don't want to find out the hard way that I
was wrong. Anyone with experience here? The pipes are about 25 years
old, if the matters.


Not a good idea. Do the job right and add a section and re-solder. That
tubing is more rigid than you think.