With about 2,000 miles on our 2017 Mod 178, I was gassing up the car and checking out the camper, hitch connections, etc. and noticed that the black tank valve was a little close to the ground. So I wiggled it, and, sure enough, the strap between the frame and the pipe clamp on the black tank valve tube had failed, so the valve tube was simply hanging from its connection to the tank itself.
I was lucky - it had not cracked the tube's connection to the tank, and had not been ruined by rubbing along the ground at 65 mph.
I always carry some stainless steel perforated strapping (and a few stainless screws, nuts/bolts) - so I was able to crawl under the camper, wrap the valve tube with the St Stl strapping and actually used the screw already in the frame (holding the failed strap) to secure the new St Stl strapping to the frame.
BEWARE - there is a lot of vibration that flexes that thin strap between the frame and the pipe clamp Forest River provides - even on Interstates.
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The gray tank valve tube is different - it appears that there is no strap suspending that tube from the frame, but rather the pipe clamp seems to be directly connected to a fitting on the frame - I'll have to look more closely at that.