Hi all, we moved into a new home with a IG pool and yesterday we had a heavy rain storm and today I look out to see the liner pushed out all over the place. I have read several posts regarding this and I wanted to see if I am doing this right. We have drains in the cement around the pool and also ther is a pipe coming into the pool shed witha valve called "sump". According to the plans this sump line goes down near the main drains. The pool level is very high so I am pumping the water out using the waste valve. I opened the sump valve assuming this sucks water via the sump line while pumping out the waste line? Can someone tell me if I'm doing this right?