5 Ways Your Sprinkler System Is Wasting Water (And Money)
You set your sprinkler timer in May, the lawn greens up, and you don’t think about it again until October. Meanwhile, your system could be dumping hundreds of gallons down the street every week without you noticing.
Most Spokane homeowners don’t realize they have a problem until the water bill spikes or brown patches appear despite daily watering. In a semi-arid climate like ours, where every gallon counts and aquifer levels are monitored closely, an inefficient sprinkler system isn’t just expensive. It’s wasteful in a way that adds up fast.
At Delk Management, we’ve diagnosed irrigation issues across Eastern Washington since 2011. The good news is that most water waste is fixable. You just need to know what to look for.
Why Sprinkler Waste Is a Bigger Problem in Eastern Washington
Spokane’s summers are hot and dry, which means irrigation season runs long and demands are high. We’re not getting afternoon thunderstorms to supplement what your sprinklers miss. If your system is running inefficiently, there’s no natural backup to mask the problem.
Our soils, mostly volcanic ash and silt loam, drain quickly but don’t hold moisture well. Overwatering doesn’t just waste water, it also leaches nutrients and encourages shallow root growth. Add in the fact that Spokane draws much of its water from the Spokane Valley-Rathdrum Prairie Aquifer, a sole-source aquifer that serves hundreds of thousands of people, and conservation becomes more than just a cost issue.
Fixing inefficiencies in your sprinkler system is one of the easiest ways to reduce waste without sacrificing a healthy lawn.
Way #1: Low-Head Drainage After Every Cycle
Ever notice water pooling at the lowest point of your yard after the sprinklers shut off? That’s low head drainage, and it’s one of the most common sources of waste in sloped landscapes.
Low head drainage happens when water in the pipes drains out through the lowest sprinkler heads after the zone turns off. Instead of staying in the lines, it dumps onto the lawn, creating soggy spots, runoff, and uneven watering. Over time, this can waste hundreds of gallons per month.
The fix is installing check valves in the sprinkler heads on lower zones. These valves prevent backflow and keep water in the lines where it belongs. It’s a simple upgrade that most homeowners don’t know exists until a technician points it out during sprinkler system maintenance.
If you’re seeing consistent puddling in the same spots, even when the system isn’t running, low head drainage is likely the culprit.
Way #2: Broken or Tilted Sprinkler Heads
A cracked sprinkler head or one that’s been knocked sideways by a lawnmower might seem like a small issue, but it can double the water use in that zone.
Broken heads spray water everywhere except where it’s supposed to go. You end up watering the sidewalk, driveway, or street while half the lawn stays dry. Tilted heads do the same thing, they throw water at the wrong angle, missing coverage areas and creating dry patches that make you think the whole system needs to run longer.
We see this constantly after spring startups or following yard work. A head gets damaged, the homeowner doesn’t notice, and the system compensates by overwatering other areas. The result is uneven turf, wasted water, and a higher bill.
Check your heads at least once a season. Look for visible cracks, geysering (water shooting straight up instead of fanning out), or heads that aren’t level with the soil. If you’re seeing signs of overwatering grass in one area and drought stress in another, misaligned heads are often the reason. Most sprinkler repair for broken heads is inexpensive, but ignoring it adds up fast.
Way #3: Incorrect Water Pressure (Too High or Too Low)
Water pressure might not be something you think about, but it directly impacts how efficiently your system runs.
If pressure is too high, sprinkler heads mist instead of delivering a solid stream. That mist evaporates before it hits the ground, especially on hot, windy days. You’re essentially watering the air. High pressure also wears out components faster, leading to leaks and valve failures that require irrigation repair down the line.
Too low, and heads won’t pop up fully or cover their designed radius. You end up with dry spots and have to run the system longer to compensate, which wastes both water and electricity.
Proper pressure for most residential systems is between 30 and 50 PSI. If you’re outside that range, you need a pressure regulator or an adjustment to your main valve. A professional irrigation audit will measure pressure at multiple points in the system and recommend fixes. Pressure problems are sneaky because the lawn might still look okay, but you’re paying for inefficiency every time the system runs.
Way #4: Outdated or Poorly Programmed Controllers
A controller from 2005 that’s still running the same summer schedule in April and September is throwing money away. Older timers don’t adjust for weather, soil moisture, or seasonal changes. They water on a fixed schedule whether it rained yesterday or the soil is already saturated.
This is where a smart irrigation controller makes a real difference. Modern systems pull local weather data, adjust run times based on temperature and rainfall, and skip cycles when the soil doesn’t need it. Some even factor in evapotranspiration rates, which is the amount of water lost to evaporation and plant use.
But even if you’re not ready to upgrade, you can still improve efficiency by reprogramming your existing controller. Our irrigation services in Spokane include controller programming as part of every tuneup. We adjust run times, fix zone overlaps, and make sure the schedule matches current conditions.
If your controller is more than ten years old or you’ve never changed the settings since installation, that’s a red flag.
Way #5: Running the Same Schedule Year-Round
This is the single biggest waste we see, and it’s completely avoidable. A system programmed to run 20 minutes per zone, three days a week in July, does not need to run that same schedule in May or September.
Cool-season grasses, which dominate Eastern Washington lawns, need far less water in spring and fall than they do in peak summer. Running a summer schedule outside of summer doesn’t just waste water, it also causes overwatering lawn signs like fungal growth, shallow roots, and spongy turf.
The fix is simple: adjust your schedule seasonally. In early spring, you might only need to run once or twice a week. By mid-summer, you’ll ramp up to three or four times, depending on heat and rainfall. In fall, you taper back down.
If that sounds like too much work, a smart irrigation controller does it automatically. You can also use a technique called cycle and soak irrigation, where you split watering into shorter intervals with breaks in between.
This reduces runoff on slopes and helps water penetrate deeper. For more on timing, check out our guide on how to adjust your irrigation schedule seasonally.
How Much Water Are You Actually Losing?
A single broken sprinkler head can waste up to 25,000 gallons per year if left unfixed. Low head drainage on a sloped yard might add another 10,000 gallons. An outdated controller running the same schedule year-round can easily double your seasonal water use.
For the average Spokane homeowner, that’s hundreds of dollars a year going straight into the ground, the street, or the storm drain. The good news is that most of these problems are cheap to fix relative to what they cost you in wasted water.
Water waste isn’t always dramatic. You won’t see a geyser in the yard or a flooded lawn. It’s the small, persistent inefficiencies that add up.
DIY Checks You Can Do This Weekend
Start by walking your zones while they’re running. Watch each head pop up, check the spray pattern, and look for misting, tilting, or broken components.
After the system shuts off, walk the yard again and look for pooling or wet spots that shouldn’t be there. That’s your low head drainage check. If water is still running five minutes after the zone stops, you’ve found the problem.
Check your controller settings. Write down the current schedule, then compare it to what your lawn actually needs right now. If it’s the same schedule you set in June and it’s now September, it’s time to adjust.
Finally, look at your water bill. If usage spiked without a corresponding increase in temperatures or decrease in rainfall, your system is likely the reason.
These checks won’t catch everything, underground leaks and pressure issues require specialized tools, but they’ll flag the most obvious waste points.
When It’s Time to Call an Irrigation Professional
If you’re finding multiple broken heads, seeing wet spots you can’t explain, or noticing that your lawn looks worse despite running the system more, it’s time to bring in a pro.
A professional irrigation audit includes pressure testing, flow rate measurement, valve inspection, and a full zone-by-zone evaluation. We’ll find leaks you can’t see, adjust components you didn’t know existed, and give you a clear picture of what’s working and what’s not. At Delk Management, we’ve been fine-tuning systems across Eastern Washington for over 14 years. We know the quirks of local soils, the demands of our climate, and the most common failure points in the systems installed here.
We also handle everything from minor sprinkler repair to full zone replacements, controller upgrades, and seasonal adjustments. For more on what a professional service includes, check out our breakdown of professional irrigation services benefits.
Don’t wait until something breaks completely. Proactive sprinkler system maintenance near you costs a fraction of what you’ll pay in wasted water, emergency repairs, and lawn replacement.Contact us to schedule an audit, and we’ll get your system running the way it should.
