Paintball Tank Hydro Dates: What They Mean and How to Read Your Tank
Short answer: The markings on your tank's neck or label tell you when it was made, how it was approved, and when it needs hydrostatic retesting. There is no single hydro schedule for all paintball tanks: the retest interval depends on the specific cylinder and its approval. A tank past its retest date may not be eligible for a fill, so check the date before game day, and if you're unsure what a marking means, ask a qualified cylinder testing facility instead of guessing.