Well, I could really use some help here on an idea. Last year when I had my pool built, I asked for a "stub up" line to be installed. I didn't have a diving board so I was thinking about a slide in the future. The pool builder put a 1 1/2 inch line for the stub up. He enclosed it and put a standard 10 inch cover over it, so it looks just like one of my filter/drain plates. I've decided not to do a sliding board so now I'm trying to think what I can do with this line. The obvious choice would be a rock water fall but I already have a raised wall with 2 waterfalls. I've seen water jets that shoot the water back into the pool. That might be nice. Below are two pictures. One shows the close up of the drain cover and the other is a more distant shot giving you a better look at the layout. You can see the 2 waterfalls on the left side. The cover plate is 58 inches from the edge of the pool. BTW don't mind the green water, I just "opened" it today!