Found this video the other day. I had always wondered how well they work:
(We did get the tornado installed in our Axis when we bought it...Even if the dealer installed it in the wrong spot, watching this video makes me think it is still pretty effective.)
I do have a couple of nitpicks with the video, though:
- He states the clear elbow is useless because all he sees is clear water while filling--you don't watch the water in the elbow while filling, you watch while dumping
- The "heavier junk" that is shown left in the tank most likely won't be there after a while due to the additives you put in the tank to break down the waste