Update - dealer says problem was a bad seal in the black tank valve. They have "allegedly" flood tested the tank and all good. So... will bring the trailer home tomorrow and perform a flood test myself - then its off on another week trip Monday so I'm keeping my fingers crossed.
Will be at a full service park so can excercise the system several times while there.
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2014 Montana Mountaineer 331 RLT. Winneguard SWM Traveler Satellite Antenna, Progressive 50 amp portable EMS, 6 point Level Up.. 2016 Chevy 3500 Duramax Dually, long bed, B&W Patriot hitch.
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