I have a loop-loc safety cover for the winter and have always drained down my pool in the fall about 15 inches. In early spring I always have to drain the pool back down because it is getting on the verge of getting too high which tells me we get about 15 to 20 inches of precipitation over the winter. Recently I had a pool professional tell me that didn’t need to drain the pool at all in the winter. He said leave it at the center of the skimmer and for whatever reason it will not overflow. I do use a gizmo in the skimmer so that it wont crack. He said he closes and opens between 50 and 100 pools a year and this is what he does. I have underground black plastic pipe going to my returns and he said as long as I have that I don’t need to drain the pool below them. What is the proper way to do this? If I am getting 15 to 20 inches of precipitation over the winter I have to believe that the pool will overflow. Maybe this is okay, I don’t know. I only have three years pool experience and I am still learning the best way to do things. His thoughts are you never want to drain water if you don’t have to because of the issues it can cause with your liner and pool walls. What do people who use these covers normally do? Any input is appreciated. Thanks