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HPA Tank Hot Fill: Why Pressure Drops After Filling
The field filled you to 3,000, and twenty minutes later the gauge reads a few hundred less. An r/paintball player asked why their 48/3000 tank "loses pressure right after airing up." Short answer: an HPA tank hot fill heats the air, and the reading drops as it cools. Usually nothing is broken. Why does an HPA tank hot fill read low later? Fast fills heat the air and the bottle. Hot air pushes harder, so the gauge reads high at the station, then settles as the tank cools. The New Jersey Scuba air fills page says the proper way to...