What and Why you need a nipple cover
Most paintballers know that 99% of all air problems is caused by dirt. Say that you dive into a bunker. By doing that a clod of dirt gets into your fill nipple. No matter how hard you try the dirt will not completly come out. Then when you get your tank filled up the dirt is pused into your tank. Then moments later "pppsssssss" air is gushing out of your regulator.
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