Troubleshooting RV Water Leaks

Identifying the Leak

Water leaks in an RV, while appearing to be big problems, often are much simpler and easy to handle than you realize. Most often a water leak is caused because something came loose, or too much pressure built up in a line or tank. Usually water will be found leaking from seams in the ceiling or joints, or from under the RV. If the water is coming from above, it is most often a structural problem. If the water is leaking from below, it is most often a pressure or overflow problem.

Structural Problems

Structural problems can range from loose joints and rivets, to improperly sealed windows or doors. You can also have problems with the roof seams when changes in weather cause expansion and contraction, or there is debris allowed to build up on the roof. If the seams or seals allow water between them and the RV frame, you will have a water leak and possible water damage. If you see damp spots on the interior ceiling, you have a loose seam. If you have damp spots on the walls, you have a loose window or door seal. Either item needs to be replaced as soon as possible. If pockets of water begin forming in the ceiling, gently pop the pocket and drain the water. Place a tarp over the exterior roof to keep water from entering further.

Non-Structural Problems

For under the RV water leaks, you will need to locate where the leak is coming from. If it is the air conditioner, check to see if the AC is mounted tightly. There are up to four bolts holding the unit to the RV, and one could have come loose. Tighten this to form a seal to keep water out. If this isn't the problem, remove the shroud from the AC, and clean the base out. If the holding tank or lines have begun to leak, then pressure has caused a crack in the line or tank. If you can avoid using the tank until then, drain the tank and shut down the water flow to it. If the water heater is leaking, the problem is the same as a holding tank; cracked plates, lines or coils. Another problem would be that the pan which holds the evaporator coil could have a hole or crack. The last item to check would be the water pressure coming into the RV. If the pressure is too high for the lines to handle, you will have tears forming in the lines, causing leaks. Use of a water pressure regulator can help avoid many problems.