Avoiding the Stinky Slinky

If someone needs the high tech dumping equipment, that's great, but for many folks gravity works very well. I have never had anything hang up in a stinky slinky that water wouldn't flush out. When I'm done camping, I dump into one of my cleanouts at my house and I flush the black water, then the gray water tank a couple of times. As I said earlier, the only issue is making sure the hose is graded. It is something that is required for gravity to do it's job. I like to keep it simple. Besides, I have a nice ABS tube near my dump connection that has a cap on both ends. That makes it real easy to clean out if necessary. Since I flush my tanks through the stinky slinky, it is relatively clean when I'm done, therefor the storage tube has never needed cleaning.
As far as time, when I'm dumping my tanks, they are dumping out of a 3" pipe. It doesn't take very long for them to empty. The time would be measured in seconds. I'll bet it take more than two minutes to dump both the black water and gray water tanks when they are full.