How to isolate a runaway Flojet BIB pump

Is your pump continually pumping? Do you hear a constant hissing sound coming from co2 or air ?


The issues usually happens from having an empty BIB or from a BIB connection that is not seated properly and the pump still wanting to continue filling the line with syrup. The issue could also be caused by a bad pump that has been running constantly. 


To fix the issue, you can simply disconnect the specific pump from the co2/air circuit while keeping the functionality of your remaining BIB pumps or carbonated water. 


I will walk through the solution in the attached video, but you can follow along with the written dialogue below or refer to the script if you are short on time! 


First, you will need to identify the pump that is leaking or pumping away by following the tubing from the pump back to the BIB. Once identified, locate the co2/air line at the bottom of the pump. There are three lines connected to a BIB pump. One line is the syrup that is feeding from the BIB itself. This line is generally clear. The next line is another syrup line that feeds to the dispenser. The third and final line is for the co2/air that is a 1/4” line connected to a small brass type fitting that has an auto shut-off once detached from the pump. This is the line that needs to be disconnected. 


**The co2air line looks similar the syrup line that feeds to the dispenser. To ensure that you have found the right pump to disconnect, you should be able to trace the co2/air line back to another 1/4” line connected to a regulator controlling the PSI (pressure). 


 Keep in mind there two different kinds of release mechanisms for a Flojet pump to remove the Co2/air line. An older style pump will have a swing hinge that requires a Phillips head screwdriver. To remove the line, loosen the screw a bit and swing the clasp over to pull out from the fitting. The new model will just have a simple slide style lock. To remove the line, slide away the line from the fitting and pull the fitting out. Once you determine what kind of release mechanism you have, easily remove the line and take the pump out of the co2/air circuit until the replacement can be installed. 


For a replacement or any additional questions or concerns, please visit for contact information or call us at 833-366-2782. We are happy to help, even if you just need further assistance on removing  the co2/air line.


We have lots of other content on diagnosing and fixing beverage issues, please check those out for a fast/free way to keep your cups full! 





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