Another advantage had by having a steel pressure tank, I can connect a hose to the tank drain and have pressurized flow. Initially, I had reservations about the steel tank putting out a lot of rust into the supply side but that hasn't been an issue. Yes, I get a small amount of rust when dewinterizing but it isn't enough to worry about. When I dewinterize and fill the tank, I've got a hose from the house onto the tank inlet and a hose on the drain outlet. The flow from the hose eliminates most of any rust, along with bleach in the tank for santizing.