Hello Sarah, I checked this with a sample problem but I am able to select and test fire flow analysis for my selection set. Is it possible for you to share the model files for our testing? Sharing Hydraulic Model Files on the Haestad Forum Additionally, are you getting a user notification such as "Fire flow reference to a deleted selection set.". It might be you are working on a different alternative and the particular hydrants might not be active in your current scenario? Fire flow error message: "Fire flow reference to a deleted selection set." Hope this helps.
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