I was not sure where to put this so please move if in the wrong spot. I have a IG pool. We also have a main drain. I have been in the house for over 2 years and have never figure out how to use the main drain. Have never needed to, but just would like to know how if I ever do. I think I have found the spot where if I need to drain where it drains out, but not how to start the main drain to drain the pool. Anyone have any idea. There is nothing around the pump or anything that just jumps out at me.