Sometimes part of a tree or some grid lines may not show up in HydraCALC when sent there by the AutoCalc process. How do you find the ones that are missing?
This drawing should have 12 loops, since it is a grid with 13 lines:
The AutoCalc process appears to run fine and gets the job set up in HydraCALC. However, when the Calculate button is pressed – only 11 loops are accounted for:
(Note: I always look check the number of loops whenever I calculate, even manual calcs and trees!)
The calc will run, but my demand will be higher than if all the grid lines were connected. So what happened? What grid line is missing?
Start AutoCalc again. This time pick the Check Model button:
This will analyze the drawing and note anything unusual. Yellow error circles will be placed at these points. Click on an error once to read the error message using Quick Properties, or double click to read using regular Properties. Generally you will get a yellow error at each cap and one at your water supply. You can ignore those if they look okay to you. But in my case, I got a second error at the upper left corner of my grid:
There should be no dead end pipe there, with or without pipe. It turns out the line does not stop at the top of the riser nipple, as it should. Redrawing it fixed the missing loop.
The H-Factor 
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