I have a copper line going through the sub floor down to the water line. The copper line was barely touching the corner of the air handling system and over a period of 3 years, it formed a pin hole leak. I tried to cold solder it but that didn't work. I then cut the line and tried a compression fitting which was a disaster. I would like to replace the whole copper line and add a shutoff to the ice maker line itself, because now I have to shutoff that whole water line which shuts off one of my outdoor faucets. How should I go about this? Should I replace it with copper line of the newer flexible plastic tubing--and how do I go about adding the additional shutoff valve coming off the water line?

Thanks for the help--feel free to copy my email address as well.

Jeff