montana 3665 re
Hi, I'm new to this forum and new to RVing. I recently bought a used 2011 Montana 3665RE and the gentleman I purchased it from did not know much about it, so I am learning by doing. On a recent trip, our kitchen sink backed up and wouldn't drain. On the interior control panel there is an indicator for grey 1 and another one for grey 2. The grey 2 is reading full. Does anyone know if I have two grey tanks and if so, how do I empty the grey two. On my outside panel, I have a release handle for black water and only one handle for grey water. I do not have any draining issues with the shower or bathroom sink. Any thoughts, suggestions, or education is appreciated.
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