The Procedure of Hydrotesting According to DOT standard

Paintball cylinders in the market are made from various materials from steel, carbon fiber and even a solid polimer. They all have different characteristic in order to sustain the HIGH PRESSURE in paintballing.
Thus, in order to fullfill the safety on the cylinder usage, hydrotest should be carry out based on the manual from Department of Transportation (DOT) USA or Transport Canada (TC) Canada. You will noticed on your cylinder which manual related to your cylinder written on your cylinder as example below :

 Example 1

Example 2

Here in Malaysia, we are more in DOT standards as most of the time deal with USA. Hence a facility with requirement below is needed: 

1. At least one CERTIFIED DOT Manager and one CERTIFIED Technician
2. A workshop inspected and passed DOT requirement endorsed by an DOT inspector  

The video below is the procedure of a cylinder undergo a hydrotest according to the DOT manual (taken from Web Dog Radio).

 It is the law to ensure your cylinder is safe not for your own safety but for your surroundings as well. Hope this information help. Make sure the hydrotest is DOT certified.