Surrogate foam test system

An agent distribution system for a fire apparatus, the agent distribution selectively operable in a testing mode and an operating mode, the agent distribution system comprising:

• a water tank including a first water outlet and a second water outlet, the water tank configured to store water;
• a flush line coupled to the first water outlet such that the flush line receives water from the water tank;
• a water line coupled to the second water outlet of the water tank;
• a flush valve positioned along the flush line, the flush valve configured to selectively prevent water from flowing along the flush line downstream of the flush valve;
• an agent storage tank including an agent outlet, the agent storage tank configured to store agent;
• an agent line coupled to the agent outlet such that the agent line receives agent from the agent tank;
• an agent valve positioned along the agent line, the agent valve configured to selectively prevent agent from flowing along the agent line downstream of the agent valve, wherein the flush line extends into the agent line at a junction, wherein the junction is disposed downstream of the agent valve;
• a first flow meter positioned along the agent line downstream of the junction, the first flow meter configured to obtain a first flow rate of a fluid flow;
• a second flow meter positioned downstream of the first flow meter and upstream of a discharge system, the second flow meter configured to obtain a second flow rate of the fluid flow entering the discharge system;
• an eductor coupled to the agent line and the water line downstream of the first flow meter and upstream of the second flow meter;
• a metering valve positioned downstream of the first flow meter and upstream of the eductor, the metering valve configured to facilitate metering the fluid flow entering the eductor along the agent line;
• and
• a controller configured to selectively operate the agent distribution system in the testing mode, wherein, during the testing mode, the controller is configured to:
• close the agent valve to prevent agent within the agent tank from flowing through the agent valve along the agent line to the junction;
• open the flush valve such that the water tank is in direct fluid communication with the flush valve, the flush line, the agent line, the first flow meter, the metering valve, the eductor, and the second flow meter;
• evaluate the first flow rate of water flowing through the first flow meter;
• evaluate the second flow rate of water flowing through the second flow meter;
• determine a flow percentage by dividing the first flow rate by the second flow rate;
• compare the flow percentage to a target flow percentage to determine an agent distribution performance characteristic;
• determine the agent distribution system is performing properly based on the agent distribution performance characteristic being in a predetermined range, wherein the predetermined range is based on a current setting of the metering valve;
• modulate the current setting of the metering valve from a first setting to a second setting;
• and
• conduct the testing mode sequence again to verify the agent distribution system is performing properly at the second setting of the metering valve.