no height but it does have a strong pull. We saw 2 little boys go under while there in October. Both times the life guard had to jump in and hit the emergency stop.
My niece who was almost 3 at the time did it once. She was only 34 inches at the time. You have to go by yourself and I stood at the bottom and got her but I was pushing against the pull the whole time. There is a small slide close by that my niece did a couple thousand times... lol