Hydratec Inc.

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Standalone HydraCALC (Location)

Button: Calculate Function: Calculation Results Error Type: System is -nan(ind) psi

Description:

After calculating the system, the results show, "Your System Has a Deficit"

System is -nan(ind) psi over the Water Supply Curve

Solutions:

1.
Cause:

The end user somehow got a negative sign into the Fittings column
Solution:

Don't put negative fittings in the Ftgs column
2.
Cause:

Pump data was zeroed out.  Clicking MAKE NFPA CURVE doesn't correct the issue
Solution:

You must return to the previous screen and delete the pump entry, then re-create a new pump
3.
Cause:

Missing water supply information

 

It's possible the -nan(ind) is legit if a demand calc is being run.

 
Solution:

Verify you have a legitimate water supply in the calculation
4.
Cause:

There are pipes with zero length.
Solution:

Correct input so all pipes have a positive length.
Updated: Sept. 25, 2025, 12:38 p.m. Created: Aug. 11, 2021, 3:31 p.m.