Almost never.
no need to change the copper tube if the capacity of the unit is same.
Green copper pipes do not necessarily need to be replaced. The green color is typically caused by oxidation and does not affect the functionality of the pipes. However, if there are signs of corrosion or leaks, it may be necessary to replace the pipes.
Replace them with copper or plastic pipe.
Copper pipes will last the longest. anonymous@oola.com
Copper is used as hot water pipes because the copper will not corrode when the hot water goes through the pipes
To prevent corroded copper pipes in your plumbing system, you can install a water softener to reduce mineral buildup, avoid using harsh chemicals that can corrode the pipes, and regularly inspect for any signs of corrosion. To repair corroded copper pipes, you can use a pipe cutter to remove the corroded section and replace it with a new piece of copper pipe using soldering techniques.
Copper is used as hot water pipes because the copper will not corrode when the hot water goes through the pipes
Copper 99%
You should be very careful. You can actually cause your pipes to leak by doing this. The best bet is to replace that section with some PEX which is plastic and won't corrode.
=== === By the way I doubt very seriously your using copper pipes your using copper TUBING
No, copper is a metallic element.
Copper pipes are now most commonly used in plumbing. Lead pipes were used long ago, and the word plumbing is derived from the Latin word for lead (plumbum). Iron pipes were used until relatively inexpensive copper pipes became readily available during the twentieth century.