2007 Cougar by Keystone Leak

[Chuck negra]

Slow Leak in rear bunk area behind bathroom On floor/Carpet when connected to water source. No visible leak from bathroom plumbing or undercarriage of trailer. Any suggestions would be appreciated.

Chuck

 

[Gary RV_Wizard]

If it only leaks when pressurized (city water or pump on), then it has to be a water line, perhaps in floor or wall. No magic; just have to start inspecting lines, opening up areas as needed.

To be sure it is a pressure leak, leave pump and city water off but pour buckets of water down sink/shower/toilet drains to see if it still leaks. If yes, it's a drain line rather than pressurized line.

 

[Chuck negra]

Thank you Gary,
We did open wall behind bathroom also pulled back insulation/covering from under trailer and we’re unable to locate source of leak. So frustrating.

 

[Gary RV_Wizard]

Follow the wet on the floor. It's either flowing across the floor, or running down the wall from above.

 

[Kirk]

Have you gained access to the plumbing lines in that area? If the carpet is getting wet you should be able to get a good hint about where the leak is by watching for the first location to get wet.