Copper pipe water line is out of round….can I still use a compression fitting valve and just add some teflon tape at the compression nut to ring seat fit. it is slightly oval. I noticed a slight wetness just behind compression fitting. I think I can reset it with a little Teflon placed over the ring setting where the nut stresses down on it.
Copper water water line is out of round slightly
copper
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This is not likely to be a major problem, but I can think of two ways it might cause trouble. One is noise, which can occur when the pipe moves due to thermal expansion or rapid water shutoff. Another is galvanic corrosion, which can occur when non-copper metals contact copper water pipes.
Either of these issues can be easily addressed by placing a section of foam pipe insulation around the copper pipe in a way that prevents contact with the duct.
Wire that is 8 AWG is just a smidgen over 1/8" in diameter. Copper wire is also a soft metal that actually bends fairly easily.
The trick to bending wire into a shape is to bend it around an object using the object as a mandrel. If your project is similar to producing something like the following then I think you can bend the wire simply using the bottle as the mandrel. For the tight turns at the neck of the bottle I would start by using a longer than needed length of wire at the broad part of the bottle and wrap down through the tighter and tighter turns at the neck. If you have an extra length to hold onto as you get into the tight turns it should be relatively easy to just form it around. After the bends are complete then cut off the excess foot or so of wire. In the example shown the maker actually formed a decorative ending on the wire.
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Best Answer
I do not think that teflon tape will help with an out of round tube in a compression fitting. My first thought would be to try to restore the tube to roundness by proper use of Vise-Grips with a rag to prevent scoring of the sealing ring. There is a die clamp device designed for gripping tubing to make a flare in the end. This die might be used to restore the tubing to roundness. You might have to remove the ring seal and put on a new one after truing the end of the tubing.
But be prepared to cut off the out of round end and join a fresh piece of good tubing.