What you have is called "Qest" and unfortunately you have the worst example of it.
The tubing and fittings themselves aren't bad but those silver aluminum clamps will stretch and loosen over time. Eventually the pipe will either leak or pop apart completely. You could replace just the offending fitting with a compression type but the problem will happen with the rest of the fittings eventually.
You can replace aluminum bands with copper bands and they will last forever. Or, you can replumb the whole RV with Pex.
Sorry for the bad news.
Scott
