Ok last year i thought i had everything drained according to the manual. I ran anti-freeze through all the lines by passing the hot water tank like it says in the manual. However this spring when i went to use my trailer i discovered that my hot water tank had a hole the size of a soft ball because it wasnt drained properly. I have a 2006 Jay-co toy hauler, 28ft tow behind. If anyone has a similar model and is knowing how to drain that darn tank so i dont have to replace it again in the spring please feel free to let me know.