When that happens, I use a slightly longer hose. Let the grey run and plant the tank lower that the outlet. You may have to help it by lifting the hose by hand.
You do know the 2 rules you have to know to be a Plumber?
2011 351RLTS Eagle, Mor/Ryde suspension & pin box, Hughes PWD50 Power Watchdog
06 F350 Lariat PSD SRW, LB, CC, EGR delete kit, 16K DrawTite hitch, Timbrens, TST TPMS
2017 GMC Terrain (future TOAD)
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