Say you want to add a loss curve for a new device. Here's what you do:
1. Open HydraCALC
2. Pick the Utility pulldown menu and then pick Alter Pipe/Fittings
3. Go to the bottom of the table and you will see other curves here (all are defined as a Z fitting)
4. In the first open line, pick Z from the first column, then pick Curve from the second
5. In the third column put in a three letter short name. The first needs to be upper case and the next two lower case
6. In the fourth column type in a description of this device (make, model)
7. On the right half of the table you will see columns with diameters from 1/2" to 24". Locate the one corresponding to the size you need and click in it
8. You can now 'draw' the curve by either picking and dragging the six points on the existing straight line or you can type in six values for Pressure (P1, etc) and Flow (Q1, etc). You can also adjust the scale of the curve by changing the flow and pressure increments. Notice the default is in PSI, click this to change it to bar or kPa. Pick the Save button.
This will place an X in the diameter column you were in. Continue for any other sizes you might need. To remove a curve, arrow over to the X you no longer want and pick the Delete button at the top of the screen.
The H-Factor 
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