I only have one pipe coming out of the ground. That pipe goes into my pump, to the filter, and back out. Is it common for pools not to have a diverter to control suction. I'm asking because ive read that suction should normally be set at 80% for the skimmer and the other 20% for the main drain. I guess in my case, it is 50/50. Is this something I should take care of. Question for any pool installers or knowledgeable homeowners. Where do installers normally tee the main drain and skimmer in situations like this. I'm asking because i'm a plumber and would like to install a diverter if they are commonly tee'd close to the surface. I don't want to start digging though till I find out. Or... is digging the only way to find out? Thanks for any replies