When you take your Open Water Scuba Class, one of the things we talk about is Visual Inspection (VIP) on cylinders, the Cylinder Maintenance VIP. You learn this must be done annually and hydrostatic testing is done every 5 years. A lot of times when you are in that class, this doesn’t always make sense or you are learning so much new information you may not always remember this portion. That anticipation to get out into the water takes over! But, this is a very important piece of gear maintenance you should learn about. Let’s learn a little more in-depth about what happens when you bring your tank in for the yearly/5 year maintenance of your SCUBA tank.