Thanks but no, I dumped the tanks this morning. Dumped the black and then the grey to clean the line. I left the grey open so we could take a Hollywood shower. I thought that maybe that was the problem so I closed the grey tank valves and still have the bubble problem. I would think that the grey and black tanks have different relief vents as they are different tanks.
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Mike and Sherri
2020 3931 FB Legacy
2018 Ram 3500 Utility Bodywerks bed
TSLB Trailer Saver air ride hitch
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