Well...the ABS might be pretty strong, but the connecting point to the tank might not be so strong. A guy at the campground a few weeks back with another brand had a situation similar, only his drained out by his back bumper. Anyway, they must have hit something and it broke the joint or cracked it where the pipe goes into the tank and leaked all weekend.
2015 Rushmore Springfield
Disc Brake upgrade, Goodyear G614 tire upgrade
RV FLEX-ARMOR roof, Mor-Ryde IS suspension
2017 F350 Dually 4x4 6.7 Bronze Fire