Thanks for following those pictures. I have some too, of the problem, but I am not able to upload them at the moment. I can't exactly see, but do you have two metal straps holding that long pipe? I only have one, about 4 inches rearward of the grey valve and not another.
I have put a few zip ties to the black tank valve handle to keep it closed while traveling today. So far, 300 miles and it is still closed. Best so far since I have owned the trailer. Thanks for the help, and I will update on what my dealer figures out.
2014 Jayco Jay Flight 32 BHDS
2015 Ford F-250 Lariat 6.7L Powerstroke 4x4