I popped the cap off my roof stink pipe to run some solar cables down the pipe.
Seems Jayco doesn't seal them all that well.
If you look behind the plastic "legs" that are covered in dicor, there is nothing in the void behind the "leg"
The water gets back there and can run to the bottom where it sits because it is a nice little pocket to sit in.
The screws are rusted all the way to the tip, so the water is getting in and getting soaked up. After years of doing this there could be rot.
Rust ring on the plastic flashing
I put it back together and squirted in some self leveling sealant behind on both the caps.