Conserve water and save money outdoors with EBMUD's Outdoor Home Survey. You'll learn how to better understand your irrigation system, locate leaks and/or broken equipment, and efficiently water your landscape with proper controller programming.
Let's get started!
First, it is important to understand the components that comprise an automatic irrigation system. Below is an overview of typical components that may be found in a residential irrigation system.
Now, let's find your meter.
Reading your meter is a great tool to better understand both indoor and outdoor usage.
You can typically find your meter in the ground under a cement cover (with an EBMUD logo) by the street near the curb. We recommend wearing gloves to protect your hands. Carefully lift the lid and slide it off to one side, ensuring not to drop the lid on the meter. Flip up the meter cover and take a look at the dial. You will have either a straight reading or round reading dial. The hands on the dial move any time water passes through the meter.
Now that you have found your meter, start with outdoor test #1 to help measure how much water your irrigation zone(s) may use, as well as identify leaks.
Outdoor test #1: Determine water use by using your meter.
Your irrigation system might branch off before reaching your house line shut-off valve. If so, you may need to test both the irrigation pipes and the house line.
Follow the steps below and check out our videos on meeting your meter and using your water meter to find leaks.
Steps:
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Find the house shut-off valve. Usually but not always, the house line goes in a straight line from your meter to your house.Turn the valve clockwise as far as it will go. Count the number of turns it takes to shut off. You will use the same number of turns to turn the water back on once you complete the test.
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After you have turned off the house line shut-off valve and the irrigation main water line is open, start by checking your water meter to see if there is continous movement on the meter. If there isn't movement on the meter, this doesn't necessarily mean there isn't a leak - it's just that the higher water use is likely occurring during the course of the scheduled watering. In this case skip to step 5 and read your meter to determine usage in an irrigation run zone or entire program.
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If the flow indicator on the meter is spinning, the first step is to locate the main irrigation line shutoff valve and turn it off. If the indicator is still spinning, this means the leak is between the meter and the main shutoff valve. If it's not spinning anymore, go to step 4.
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If, after the irrigation mainline has been shut off, and movement on the meter stops, turn the main valve back on. If the meter is back to spinning, this means that you have a mainline leak in the water line between the irrigation shut-off and the irrigation valves. The mainline is pressured 24/7 so that when the controller tells a valve to open, there is on-demand water flow to that zone. If steps 3-4 don't apply, go to outdoor test #2.
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Read your meter.
Determine water use of a single irrigation zone or multiple irrigation zones (straight meter):
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With the water off to the indoors, ensure the detector is not spinning. Make note or take a photo of the meter numbers on the dial and where the sweeping hand is.
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Turn on a single irrigation zone. Watch meter for one minute and note how many revolutions of the sweeping hand were made.
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Each revolution of the sweeping hand represents 7.48 gallons. To calculate how much water is used per minute, multiply the number of revolutions by 7.48 gallons. Ex. Zone 1: 1.5 hand revolutions x 7.48 gallons = 11.22 gallons per minute (gpm).
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To determine water use for multiple irrigation zones, make sure you have a copy of the program that notes the run time for each zone. Before turning on the program, write down or take a photo of the meter numbers and do the same when the program is complete.
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To calculate how much water is used per program, subtract the first reading from the second reading. Ex. 548010-548000 = 10 cubic feet. Convert to gallons by multiplying by 7.48 gallons. Ex. 10 cubic feet x 7.48 gallons = 74 gallons.
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You may need to identify flow rates of your irrigation equipment for comparison to ensure the water used is correct. In addition to manually reading your meter, some smart controllers have flow reading capabilities that can provide similar information.
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After you have finished reviewing your irrigation system, and making any repairs, turn the house line shut-off valve back on. Be sure to open the valve completely, using the same number of turns as it took to turn it off.
Outdoor test #2: Check your yard.
Next, walk around your yard and look for wet ground or areas that appear greener than the rest of the landscape. These spots could be getting extra water due to a leak or from broken equipment.
- Video - Irrigation Leaks 101
After you have finished inspecting your yard, continue on to outdoor test #3 to inspect your irrigation system.
Outdoor test #3: Check your irrigation system.
With the irrigation turned on, walk around your landscape and check for common issues in your irrigation system. Use our worksheet as a reference - it includes brief descriptions of potential issues and ways to address them.
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Video - Tune up your irrigation system
Conclude your inspection by continuing to outdoor test #4, where you will review your controller programming.
Outdoor test #4: Check your controller.
Once you have determined that your irrigation zones aren't using water unintentionally during scheduled run times, you are ready to review your watering schedule.
Whether you have a conventional (non-smart) or smart (sensor or weather based to adjust run times based on local conditions) controller, it is important to review and update your settings seasonally as plants mature and the landscape changes.
- Video - Control your controller
- Video - Programming tips to maximize savings
Steps:
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Review your controller. Further information can be found in the user manual or on the manufacturer's website.
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Date and time - confirm it is current.
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Battery - if your controller uses a battery backup to save programming, change as needed.
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Smart controller weather features - turned on, including the rain sensor.
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Review your watering schedule. It is important to consider:
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Watering days - deep, infrequent watering makes plants healthier and better able to withstand drought.
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Repeat cycles - clay soil cannot absorb water as fast as sprinklers and some drip can apply it. Instead of setting your schedule to water one long cycle per night, set it to water three shorter cycles overnight. This will allow the water to soak in and encourage deeper roots.
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Microclimate - plants growing in shady areas (north/east side) will generally require 50% less water than the same plants in full sun. Create programs for different types of plants. For example, lawn and trees should be on separate programs.
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When to water - optimum time to water is during the night or early morning when the sun is down and the temperature is cooler.
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Every system and every landscape is unique and therefore may need more or less than what is suggested. Take a look at our lawn and landscape watering guide as a reference.
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- If you have a conventional controller, record your irrigation schedule and keep it with your controller or save a photo on your phone. This way you will always know how long and how often each valve or station runs.
What's next?
Now that you have completed the last outdoor test, your irrigation system is ready to shine! Remember to revisit these tests at least once a year to ensure continued efficient watering and a healthy landscape.
For more tips, resources, and rebate opportunities, visit our WaterSmart Gardener webpage.
