+1 805-541-1003

Circuiting & Zones

Our Circuiting tool provides a quick and flexible method of grouping the heads in your design into valve stations. You can use our Circuiting tool to determine the necessary number of valves for each head type in your drawing, calculate the flow (GPM) of a group of heads, and place a schedule listing these numbers for your reference.


Important note: Some Irrigation F/X users have attempted to place callout text in their drawings by copying and pasting the text from one of their Circuiting zones and then changing the text to create the callout. Do not do this! Copying and changing zone text will create problems with your zones and prevent you from being able to use the Circuit tool. Instead, please use our Text tool to place callout text.

Circuiting & Zones Overview

Open the Circuiting tool:



F/X Irrigation ribbon, Circuiting button




Irrigation toolbar



or type GPMCalc in the Command line

F/X Irrigation menu, Circuit option




The Circuit dialog box will open.


1. Head Type: Select the type of head you want to circuit. The system will ignore all others.


2. Valve Zones: Valve Zones allow you to quickly indicate grouping of heads into specific zones for a valve to control.

  • Zone Number: Use this pull-down menu to select a specific zone number.
  • Zone Total: This field shows the total gpm flow for the Zone Number indicated above.


3. New Zone: After selecting a head type at the top, click this button and draw a polyline fence around a group of heads. The zone number will automatically advance and will place that zone number along with the total flow for that group of heads within the zone. Each zone is created with a different color for clarity.


4. Add New: Expand a zone you've created by drawing a new area. (The new area doesn't need to connect with the zone in the drawing.)


5. Add Existing: Combine two or more existing zones into one larger zone. (The zones don't need to connect with each other in the drawing.)


6. Recalc Zones: After you've moved the points of any polyline zone boundaries, click this button to recalculate all zones.


7. Head Tally: Calculate the flow of a group of heads without having to create a zone.


8. Uniformity: This feature automatically examines the layout of each head, determines when an area receives coverage from one or more heads, and color code those areas by how many heads have coverage in that area. For more information, see our Uniformity documentation page.


9. Flow Total: Tally all head types you have placed into the drawing. The number will appear in the drawing. See Flow Total below.


10. Schedule: Create a Zone Schedule.

Creating Zones with the Circuiting Tool

Our Circuiting tool allows you to add up the flow of a specific group of heads in your design by selecting them one at a time, selecting a group with a polyline, or selecting and labeling a Zone with a polyline.

You must first determine the maximum flow allowed by your point of connection to be able to circuit properly. The flow of each head grouping that makes up a circuit should not exceed the maximum allowable flow for the point of connection.

When you circuit heads, you are:

  • Grouping similar heads together. Turf spray heads will never be grouped with shrub heads.
  • Grouping similar plant materials together. Water-loving plants should not be grouped with drought-tolerant plants.
  • Grouping similar exposures together. Shade areas should not be grouped with sunny areas.
  • Grouping rotor types together. Different rotor models should not be grouped together.
  • Grouping rotor arcs together. Most rotors are not matched precipitation, so group similar arc heads only on the same system


For this example, the maximum flow for each circuit is no greater than 65 gpm. The heads need to be circuited together in logical groupings that do not exceed this limit.



Open the Circuit tool, then select the type of head you want to circuit. The system will ignore all others.




Click Add New to add a new zone. You can now place the zone in your drawing.





In the example pictured to the left, we've drawn zones around two turf spray areas. Each zone is identified by its number (#1 and #2), and each zone number is followed by that zone's flow total (31.29 and 35.61 GPM, respectively).



The zone polyline borders will ignore heads of a different type. Each zone border acts as a crossing and will only count heads of the type selected within the border area or intersecting the bounding polyline.

The zone numbers (#1, #2, etc.) are arbitrary, and relate only to the order in which you've created your zones. To delete a zone, simply delete the polyline boundary and its text total. The next time you open the Circuit dialog box, that zone number will be gone.

Notice that when you place a zone:

  • The radius layer of the heads turns off to help clarify the drawing.
  • While each zone polyline border is a different color, the borders are all on the layer LI-HEAD-ZONE. At any time you wish, turn off the zone layer using either the Layer dialog box or the Express Tools Turn Objects Layer Off button.
  • The layer LI-HEAD-ZONE is a non-plot layer and will not show up if you plot.
  • The zone polyline border has a line weight of 0.40 mm. If you work in line colors and not lineweights, this function turns on the AutoCAD function Lineweight, indicated by the LWT button at the bottom of the screen. When you are finished with the zoning, you may want to turn off the LWT button if it is still on.




Adding to an Existing Zone

To add to an existing zone, select that zone from the Zone Number menu in the Circuit dialog box (example: zone #1). Then click Add New.





You can now draw an additional area to add to the zone you selected. The new area doesn't necessarily need to touch the original zone, but its flow total will be added to the flow total of the entire zone.



In the example to the left, we've added a new area to Zone #1, which you can see in the top left corner of the image.



The new area will be identified by the zone number and the flow total for that area. In this example, the new area has a flow total of 8.61.




Back in the Circuit dialog box, the Zone Total field will show the cumulative flow total of the entire zone.



In our example, Zone #1 consists of two areas with flow totals of 31.29 and 8.61 – a cumulative flow total of 39.90.




No Flow Total for Selected Head Type

If you receive the message No flow total for selected head type, it means you've selected a spray type for a zone, and that spray type doesn't exist.


If so, you simply need to select the correct spray type.

Flow Total

Our Flow Total tool tallies the total flow of the heads in your drawing, categorized by type, and then performs some basic calculations based upon the flow capabilities of your project's Source Data.


Click the Flow Total button in the Circuit dialog box to calculate a flow total.




The Command line will prompt you to select an Upper left corner.



Click to place the flow total in your drawing.



The flow values will appear in your drawing as a schedule.

If your irrigation plan includes more than one water source, the valve numbers will be represented as a range. The actual number of valves used will likely vary, but this simple calculation can help you determine which controller will be necessary, or whether the system is too much for a single point of connection (POC).

Placing a Zone Schedule

To place a schedule of the zones you've created, click the Schedule button in the Circuit dialog box.




Select a Destination for your schedule:

  • Place the schedule directly in your Drawing.
  • Place the schedule in your drawing in Table format.
  • Export the schedule to a Spreadsheet program such as MS Excel.


Click OK to place the schedule.




The example to the right shows a schedule of our two zones, placed directly in the drawing.



The schedule shows the flow (GPM) calculations for both of our zones.

Related Webinars

  • Irrigation Tools – What You Need to Know: We'll show you the ins and outs of basic irrigation setup using our software. You'll also learn the essentials of placing equipment such as drip, sprays, and rotors. (1 hr 6 min)
  • Start to Finish Basics of Irrigation Design: This webinar will help give you an understanding of how to specify the proper equipment, talk about important concepts of irrigation design, and create a complete irrigation plan from start to finish. (1 hr 31 min)
  • Irrigation Tips & Tricks: We'll show you some advanced tools you may or may not know about. You'll also learn techniques and best practices that will help speed up your workflow. (1 hr 3 min)
  • Existing Irrigation: Learn the techniques, tools, and tricks you'll need to expand an existing system, including how to use a pipe cap to account for existing flow and add new valves to an existing mainline. (56 min)
  • Advanced Irrigation Troubleshooting: Learn to think like a Land F/X irrigation troubleshooter. We'll show you why your symbols don't match, why you would see the message "Error accessing equipment data" (and how to fix these issues, as well as tips on pressure losses and precip rates, pipe caps, system monitors, and flow zones. (1 hr 3 min)


Issue: When I click the Circuit button, I get an error message about the style "Zone" and a specific font not being installed


Issue: You attempted to Zoom to Extents, and the command canceled out and deleted your Zones


Issue: Error: Zone text has been edited when trying to use the Circuit tool


Issue: Your Circuit zones don't match the flow totals in your Valve Callouts

Last modified on Wednesday, 16 September 2020 09:13

Log in to