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Master Water Network Modeling: Your Essential WaterCAD V8i Tutorial Guide

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: Tables showing calculated pressures at nodes and velocities/headloss in pipes. Conclusion/Recommendations Master Water Network Modeling: Your Essential WaterCAD V8i

: List the required pressures (e.g., 20 psi minimum), pipe roughness coefficients (Hazen-Williams), and demand patterns. Input Data : Summary of pipe lengths, diameters, and nodal elevations. Hydraulic Results Input Data : Summary of pipe lengths, diameters,

| Error Message | What it means (Per V8i Tutorials) | The Fix | | :--- | :--- | :--- | | "System not balanced" | Your model has open ends or missing demands. | Check for dangling pipes without junctions. | | "Pump did not converge" | The pump curve does not match the system curve. | Lower the static head or increase pump speed. | | "Negative pressure at node X" | You have a hydraulic grade lower than the node elevation. | Raise the reservoir HGL or add a booster pump. | | "Tank empty/full" | The EPS simulation ran too long without control. | Add pump controls (On when tank < 50%). |