I recently had a 12x28' fiberglass pool installed, with a saltwater system. There is an outlet on the side of the pool, at the bottom, with a pipe running to the skimmer (which is on the same side). It's about 2" inside diameter. However, there is almost no flow through this pipe. If I shut the skimmer door, rather than increasing the draw through the pipe, it drains the skimmer. Does anyone else have this kind of design and is it normal that only like 2% of the suction is going through the outlet at the bottom, and the rest coming from the surface? I'm attaching photos.