Valve system and method for venting and measuring a gas content of a fire suppression system

A method for venting gas to an outside environment and measuring an inert gas content of the gas, the method comprising:

• connecting an inlet of a pipe fitting to an open port of a fire suppression sprinkler system so that gas flows from the fire suppression sprinkler system through the pipe fitting;
• connecting an inlet of a vent valve to an outlet of the pipe fitting wherein the vent valve is downstream of the pipe fitting and upstream of an inert gas analyzer;
• positioning at least one vent port on a conduit connected between the inert gas analyzer and the vent valve so that the flow of gas from the outlet of the vent valve passes in front of the inert gas analyzer and through the at least one vent port upstream of the inert gas analyzer to the outside environment;
• opening the vent valve connected to the pipe fitting to allow the gas to flow from the fire suppression sprinkler system, through the vent valve, in front of the inert gas analyzer, and to the outside environment;
• measuring, with the inert gas analyzer, the inert gas content of the gas flowing in front of the inert gas analyzer;
• and
• closing the vent valve to prevent the gas from flowing from the fire suppression sprinkler system through the vent valve to the outside environment when the measured inert gas content of the gas is at least a predetermined inert gas content.