Knowing what a professional sprinkler inspection really includes offers peace of mind and prepares you for the process.
When homeowners ask me, “Bob, what do you really do during a sprinkler inspection?” I can tell they’re wondering if it’s just someone flipping a switch and nodding a few times.
After 42+ years working with homeowners across Maryland, DC, and parts of Virginia, I can promise you, a real sprinkler inspection is more than just turning the system on.
Whether you’re in Columbia, Bowie, Upper Marlboro, Annapolis, Frederick, Clinton, Laurel, Gaithersburg, or Crofton, here’s what a professional inspection should look like from start to finish.
1. Controller Review
We start with your irrigation controller, which is basically the brain of your system.
We look at:
- Time and date accuracy
- Program settings (start times, zone durations)
- Seasonal adjustments
- Rain/freeze sensor functionality (if installed)
In Waldorf last spring, we helped a homeowner who thought their system was broken. As it turns out, all the programs were scheduled for AM instead of PM. A five-minute fix saved their lawn.
And in Laurel, we found a system that had been running twice a day due to overlapping programs. The homeowner’s water bill dropped over $90 the next month after a simple reprogram.
2. Zone-by-Zone Run-Through
We activate each zone one at a time and:
- Watch every sprinkler head
- Check for clogged, tilted, or non-popping heads
- Look for missing spray coverage
- Identify any misting (from high pressure) or pooling (from leaks)
In Anne Arundel County, we inspected a home where the heads were missing an entire corner of the yard. After adjusting three heads and replacing one clogged nozzle, the lawn was evenly covered again.
In Clinton, a client had dry spots for years. During the inspection, we discovered a buried head had been covered during a mulch job. One quick fix, and it was back in action.
3. Valve & Leak Inspection
Next, we open valve boxes and:
- Test electrical solenoids
- Check for soggy soil or slow leaks
- Ensure valves open and close properly
In Bethesda, we found a slow leak that had been soaking a flower bed for months and went completely unnoticed. After a simple gasket replacement, the bed dried out and water bills went down.
In Calvert County, we used a moisture meter and pressure gauge to trace a sneaky leak that was causing low flow in one zone. That homeowner had been over-watering to compensate, and spending way more than they needed to on their water bill
4. Spray Pattern Adjustments
We carefully adjust:
- Overspray onto driveways or sidewalks
- Under-spray in lawn or garden areas
- Sunken or crooked heads
Even small adjustments can make a big difference. A homeowner in Ellicott City had spray hitting their fence for years. Once redirected, their grass filled in, and their wooden fence stopped rotting.
In Gaithersburg, we corrected the angle of several heads spraying windows. The homeowner called two weeks later to say their water spots were gone, and so were the neighbor complaints!
5. Water Pressure and Flow Testing
We check pressure at the backflow and within zones to:
- Ensure proper PSI (not too high or low)
- Detect clogged or underperforming zones
- Avoid misting or weak spray from pressure issues
In Charles County, we detected inconsistent pressure from a cracked backflow device. We replaced it and the system ran like new.
We also use AI-driven zone flow analysis tools to detect hidden inefficiencies. In Crofton, we caught an issue where one zone was drawing more water than the others due to a valve seating issue. A fast fix, but it would’ve gone unnoticed without our tools.
6. Smart System & Sensor Checks
If you have smart tech, we make sure it’s:
- Synced to your Wi-Fi
- Connected to apps and weather data
- Calibrated for zone needs
And if you don’t have smart tech, we walk you through options. In PG County, one upgrade cut a homeowner’s water use by 40% in the first summer.
In Annapolis, a retired couple wanted to control their watering while traveling. We installed a smart controller and showed them how to monitor their yard from their iPad. They sent us a thank-you note from the Outer Banks a month later.
7. Seasonal Services (Spring/Fall)
- Spring: We pressurize, test all zones, clean filters, and prep for summer.
- Fall: We blow out lines, protect backflow devices, and ensure your system won’t freeze.
Spring Startup Story (Frederick): We discovered a split pipe under a walkway before it flooded. Because we caught it early, the repair was minimal.
Fall Winterization (Bowie): A new homeowner didn’t realize the system needed to be winterized. We squeezed them in last-minute. That $129 visit saved them thousands in potential freeze damage.
FAQs: What Homeowners Ask Bob
“Do I really need a professional inspection every year?”
Yes! Small leaks, clogged nozzles, or bad timing settings can cost hundreds in water or dead grass. Prevention saves more than repair.
“Can’t I just run it and check myself?”
You can check the basics, but we use tools like pressure gauges, flow meters, and AI software to catch what you can’t see.
“How long does an inspection take?”
Usually about 60–90 minutes. We don’t rush. Your lawn deserves more than a 15-minute once-over.
“What if I’m not home?”
No problem. We leave a detailed report with photos, zone-by-zone notes, and recommendations. We’ll even record a video walkthrough if requested.
“Do you offer recurring inspection plans?”
Yes. Many homeowners in places like Laurel, Annapolis, and Rockville sign up for our TLC Total Care plan, which includes spring, mid-season, and fall visits.
Final Thoughts from Bob
A sprinkler inspection isn’t just about saving water, it’s about peace of mind. It’s knowing your system works the way it should, that your plants are protected, and that you’re not wasting a drop.
We don’t treat inspections like a sales call. We treat them like a doctor’s visit for your yard. Our job is to educate you, help you understand your system, and give you the tools to water smarter.
At TLC Incorporated, we treat every property like it’s our own. We bring old-school service and new-school tools to every inspection—whether you’re in Howard County or Upper Marlboro, DC or Damascus.
If your system hasn’t had a check-up in the last year, let’s talk. We’ll help you water smarter, waste less, and grow more. That’s what we’ve been doing for over 42 years.