Fill full 0.5L to 300bar about 5 minutes. There are no exceptions! Or, you may choose to have a replacement. Feedback is very important to us. Your satisfaction is very important for us. If you have any problems, we are very glad to help you. The item “High Pressure Electric Pump PCP Air Compressor for Paintball Air Rifles” is in sale since Friday, April 07, 2017. This item is in the category “Business & Industrial\Hydraulics, Pneumatics & Pumps\Pumps & Pump Accessories\Other Pumps”. The seller is “guanpingzhu” and is located in HONG KONG. This item can be shipped worldwide.