Originally Posted by netlace
Can it be repaired?
Sure, but it's essential that you determine how far the damage has gone.
Is the water heater damaged?
The water tank?
P traps damaged?
The best way is to measure the outside diameter of the copper tubing, throughout the entire trailer.
The original outside diameter of the tubing used in manufacturing was 1/2 inch and 3/8 inch.
Measuer carefully. If you find that you have goofy dimensions, then that means at least that area has frozen.
The copper tubing was assembled by soldering the fittings to the tubing.
When the water in the copper tubing freezes, it expands the tubing and fittings. That also usually weakens each and every soldered fitting.
If you patch the tubing, more than likely, you will continue to have leaks.
The real fix, if you find that the tubing has expanded, is to replace all of it. You can use copper or some of the new style plastics that are available.
Sorry you purchased a trailer with split tubing, but I can assure you, the previous owner was well aware of that fact and stuck you with his problem.
I would seriously examine every part of the trailer, to see what else the previous owner side stepped.
Make sure you also check the brakes and the axles.
Dura Torque Axle
Check the door, access compartment and window gaskets. Are they hard and cracked? If so, they will all leak.The sewer vent pipe gaskets only last 5 years or so, and they are probably bad as well. Replacing those gaskets is not difficult. You should use Airstream type gaskets that are only available from a dealer.