This is PEX plumbing.
There are 2 types of crimp rings, Stainless Steel with a bump on the band or a smooth copper ring. My coachman Freelander 2600SO has the Stainless Steel crimp rings.
You can get crimp tools at Lowes or Home Depot or ebay. They are pricey ~ $75 or $100. There are also special tools to remove the clamp.
This is the same system used in most houses today so a local plumber could re-crimp the connections.
This company carries both types of crimps and lots of fittings. http://store.flairit.com/c-5-plumbing.aspx
If installed correctly PEX is a good system. It sounds like the factory crimp tool was out of spec and did not crimp the SS rings correctly.
Ed