Our systems have incorporated a proprietary heating element that enables a very consistent pressure and temperature of the CO2. The pressure of CO2 coming off a bulk CO2 tank is around 300 PSI. This is due to the fact that both tanks are typically refrigerated and they are kept at that temperature so that they remain as a liquid. As the liquid heats up, the pressure will also increase. Room temperature CO2 is typically 800 to 900 PSI.