I have a Well-X-Trol tank that is horizontally mounted in the crawl space of my house. I am having a problem with short cycling of the pump and believe that the tank needs to be re-pressured. Everything I have read indicates that the tank needs to be drained in order to accurately test and adjust the pressure. My concern is the horizontal position of the tank, will I be able to get it drained enough in order to get an accurate reading?