I am in the process of installing a new bathroom. As Bath toilet etc
are all being moved i am required to do a bit of replumbing. Enter
my newly acquired pipe bender, having completed a few bends with no
trouble at all (almost as satisfing as removing the old tiles with my
sds sdrill). At random during bending the tube started kinking
(15mm). There appears to be no pattern to this, i have tried
going slow, fast etc. Most bends are at 90o. 1 particular tubes
seems to be more susceptible than others.

Anybody any ideas as to what i am doing wrong.

TIA

Billy