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  1. Knowledge Base
  2. Irrigation
  3. Pipe Sizing
  4. Knowledge Base
  5. Irrigation
  6. Errors: Irrigation
  7. Unsizeable Valve Encountered. Flow Velocity Has Been Reduced to Minimum, and Friction Loss Still Exceeds Allowable Pressure Variation

Repair Your Pipe Data (Pipes Sizing Backward, or With a Size You Haven't Selected)

Issue

You attempted to size the lateral or mainline pipes in your irrigation design, and you've noticed that your Pipe Data is not behaving correctly. For example, your pipes may be sizing:

  • Backward
  • With a size that is not in your list of approved pipe sizes
  • In any number of other ways that point to a problem with your Pipe Data

 

 

Cause

Your Pipe Data may be inaccurate or in need of repair.

 

For example, you may be using an incorrect data set of class 200. Even if you are starting a new project, the Pipe Data assigned to the current Preference Set pipe data may be incorrect. If so, you will need to correct this inaccuracy to prevent it from being transferred to any new projects, as well as fix it in the current project.

 

Solution

Complete the following steps in the order listed.

 

1. Use our Update tool to ensure you have the latest version of our software.

 

 

2. Open the Irrigation Manager, and click Pipe Data.

Irrigation Manager, Pipe Data button

 

 

 

Selecting a different pipe class from the pipe class menu in the Pipe Data dialog box

3. The Pipe Data dialog box will open. Use the menu pictured to the left to select a different pipe class from the current one.

 

Click OK.

Any other pipe class will work. The point is to select a different class from the class you currently have selected for your project.

 

 

 

4. Size the lateral pipe again for the valve that's generating the error.

Is the valve sizing without generating the error? If so, the issue was with the pipe class you previously had selected.

 

 

5. Open the Pipe Data dialog box again, and switch back to the original pipe class (in our example, Blu-Lock and PVC PIpe Class 200).

 

 

Click OK.

Switching to a different pipe class and then back to the original class will generally repair your Pipe Data.

Selecting the original pipe class from the pipe class menu in the Pipe Data dialog box

 

 

 

6. Size the lateral pipe again for the same valve. The pipe should size correctly, and you shouldn't see the error.

Contact

  • Land F/X
  • PMB 351 3940 Broad St. STE 7
    San Luis Obispo, CA 93401
  • +1 805-541-1003
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Our software tailors AutoCAD®, Revit®, SketchUp®, and Rhino® to the needs of landscape architects, irrigation designers, and other professionals. We automate your most tedious tasks and ensure accuracy, giving you more time to design.

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