Originally Posted by Silvertwinkie
If it's copper, you can simply cut the broken section and sweat a new piece in.
The only thing is, if the copper expanded enough to split, it expanded enough so a new piece of copper will not fit it. Ask me how I know this.
Depending on how much you want to finished product to look like a "field repair", you can a) cut out the affected pipe, and replace it, as much as you need to remove to get replacement pipe to fit.
b) cut out the affected area, and slide a piece of reinforced vinyl over the copper pipe. If you do this, make sure you use two hose clamps, like a marine hose connection.
c) Install adapters for CPVC and install CPVC where the copper lines are damaged. This is not as good as PEX, but you don't have to buy a special (read: expensive) tool to crimp the PEX together.
d) Install PEX throughout the coach. This is the best, and most expensive, alternative.
You can use any or all of these repair methods in almost any combination.