For the gray tank.
Plastic slug from when the factory cut the hole for the vent or drain may be caught in the drain valve.
For the drain hose.
A big rock, use it to hold your hose drain end in the hole.
Yes I have done it, the rock was holding the cap on the drain when I first saw it.
2016 F350 6.7L LB CC Reese 28K 2014 Chaparral Lite 266sab
"Those who would give up essential Liberty, to purchase a little temporary Safety, deserve neither Liberty nor Safety." 2014 19 days camping 2015 17 days camping201620 days camping