No...
Neither black nor white potable water/sanitation hose is rated to carry fuel. Use only hoses that are rated for a particular purpose in any application. That's not just an arbitrary rule...there are very good reasons: Hose materials for different applications vary....rubber hose that's rated for fuel or exhaust contains materials that are toxic in a potable water system...water/sanitation will absorb fuel...hoses that aren't rated for below waterline installation are too prone to splitting with even a little age...some hoses can stand heat, others become soft and can collapse...etc. If you have leftover sanitation hose, I'll be one of your dockmates who's trying to figure out why his boat stinks will take it off your hands.
