Bending hard copper tubing

[Frank S]

As anyone who has ever tried to bend hard copper knows, it will do 2 things very well kink sharply and break.
An easy way to solve this little issue is to first soften the copper by heating it to red hot then quenching it in water. Funny thing about copper is quenching has the opposite effect as quenching steel.
then what I did was to make a spiral cut in a piece of pvc tubing that just fit inside of the copper, and slid a pvc conduit forming spring into the plastic pipe and both of those in the copper tube then simply rolled it in a regular EMT/ rigged conduit bender.