Southern Boater
Senior Member
A trick I have employed for years for cleaning diesel tanks is to use a 5 gal pail with a tight sealing top. I cut one hole in the lid to fit my shop vac hose and another for a flexible 1/2" PVC hose. Seal both tubes to the lid with duct tape. The shop vac creates vacuum in the pail which allows the PVC hose to suck up whatever is in the tank. The fuel/crap mixture drops into the pail. It should go without saying that this should NOT be used for gasoline.
Thanks for the tip