Mine leaked in the same place and according to Dometic it is not repairable. My unit is still under warranty but I am in TX and my selling dealer in WV said I would have to take it in to a Keystone dealer for replacement. I just bought a Dometic AquaMagic Style Plus as my replacement. Keystone sent me a Dometic replacement but it is still in the box and it will stay there forever as far as I am concerned.
2015 Grand Design Solitude 320X
2016 Ram 3500 DRW and Cummins