All ActivityMost RecentMost LikesSolutionsRe: Class A and Taco Bell Drive Thru JRscooby wrote: I can't see "stuck". Does that model not come with reverse? Years ago I stopped using Taco Bell. I guess if I took my bathroom with I could go back... That's about what a friend of mine said in another forum - the topic was selecting treatments to keep solids from accumulating in the black tank. His reply was that Taco Bell is usually effective for 2-3 days.