I am purchasing a house that has a well and septic sytem and because my job requires me to be on call every other weekend and to be on the job during the winter months I would like to winterize the plumbing system. How do I make sure that the submersiable pump is ok and the water tank and pressure tank inside the house as it will not be heated. Also do I need to do anything to the well itself since it will not be used for 4-6 months.