Tanks: If you have tanks remember to check the VIP and Hydro dates. All tanks need to be in date to be filled. The VIP (Visual Inspection Program) sticker is marked with the month and year of when it was last inspected, it's good for 1 year after that date. The Hydro date is stamped into metal of your tank and is good for 5 year after the stamp. Go ahead and check out your tanks. If you find that you need to get your tanks Visually inspected and/or Hydro test bring them by NADCO. If you need a VIP you can usually get it back the same day. The Hydro test usually takes about a 4-7 days.