What to Expect During a Sprinkler System Inspection: 2026
TLDR
A professional sprinkler system inspection takes 60 to 90 minutes and follows a predictable sequence: controller check, wiring tests, zone-by-zone walkthrough, valve and pressure assessment, backflow preventer verification, and leak detection. The technician will document everything and give you a written report with prioritized recommendations. According to the EPA, a poorly maintained irrigation system can waste up to 25,000 gallons of water per year, so this checkup pays for itself quickly.
Most homeowners have never watched a technician inspect their irrigation system. You scheduled the appointment, cleared the garage so the controller is accessible, and now you’re wondering what actually happens for the next hour. Knowing the vocabulary and process ahead of time helps you ask better questions, understand what the technician recommends, and judge whether you’re getting a thorough evaluation or a superficial once-over.
A few things to clarify up front. This article covers landscape irrigation inspections, not fire sprinkler inspections (which fall under NFPA 25 and are a completely different system). Google often mixes the two topics, so if you’re looking for fire suppression information, this isn’t the right guide.
Also worth knowing: a standard home inspection during a real estate transaction typically does not cover the irrigation system. As ICA School notes, irrigation and sprinkler systems fall outside the standards of practice for the average home inspector. That makes a dedicated sprinkler checkup especially important when buying a home with an existing system.
One more stat that puts the stakes in perspective. A Resource Central program in Colorado found that 99% of the residential sprinkler systems its inspectors evaluated had inefficiencies. The question isn’t whether your system has problems. It’s which ones.
Phase 1: Pre-Inspection and Arrival
Before the technician touches anything, they need to orient themselves to your system. Here are the terms you’ll hear in the first few minutes.
System Checkup (Irrigation Inspection)
A system checkup is a zone-by-zone evaluation of every component in your irrigation system, designed to catch leaks, coverage gaps, programming errors, and compliance issues. It is not the same as a repair visit. The technician diagnoses first, then recommends fixes separately. Practitioners on HomeAdvisor describe the best experiences as following this exact cycle: diagnostic, scope of work, repairs, then a zone-by-zone walkthrough at the end.
Expect to pay between $50 and $120 for the inspection itself, with averages around $115 depending on system size and service package, according to Angi’s 2026 cost data. Repairs are quoted separately.
Controller (Irrigation Timer)
The controller is the programming hub mounted in your garage, utility room, or an outdoor enclosure. The technician will check whether it powers on, whether the display is readable, and whether the programmed schedules match your local watering rules. In Lubbock, that means irrigation is limited to two assigned days per week, based on the last digit of your street address, with watering allowed only from midnight to 10 a.m. and from 6 p.m. to midnight.
Texas irrigation practitioners consistently say the controller is where the most common and most expensive mistakes happen. Programs from last year may run too long, water at the wrong time of day, or skip zones entirely. If you have a smart controller like the Hunter Hydrawise, it may have lost its settings after a power outage or firmware update.
Zone
A zone is a group of sprinkler heads controlled by a single valve, activated independently from the other groups. Most residential systems have 4 to 12 zones. The technician will run each one separately, spending roughly three minutes per zone to observe performance and mark needed repairs. If you’re unfamiliar with how your system is organized, our step-by-step sprinkler guide explains the basics.
As-Built (System Map)
An as-built is a diagram showing where heads, pipes, valves, and the backflow preventer are located underground. Many older homes don’t have one. If you do, pull it out before the technician arrives. It saves time and helps them identify buried components faster.
Phase 2: Controller and Wiring Check
Once the technician has reviewed your controller settings, they move to electrical diagnostics. This is the phase most homeowners know the least about.
Voltage Test
The technician uses a multimeter to confirm the controller outputs the correct voltage (usually 24 VAC) to trigger each zone valve. If the voltage is low or absent on a particular terminal, that zone won’t activate, even though the controller appears to be working.
OHMS Test (Field Wiring Check)
This test uses the same multimeter to measure electrical resistance on each zone’s wiring circuit. It detects three specific problems: shorts (wires touching where they shouldn’t), opens (broken wires or severed connections), and bad wiring connections at splice points underground. The Oklahoma State Extension’s irrigation checkup framework lists wiring faults as one of the top reasons zones fail silently, meaning the controller sends a signal but nothing happens in the yard.
Rain and Freeze Sensor
A rain/freeze sensor pauses irrigation automatically during rain or freezing temperatures. Lubbock’s municipal ordinance requires systems to include a freeze sensor that shuts off irrigation at 35°F or higher, and a rain sensor set to activate at 1/4 inch of moisture or more. The technician will verify the sensor is physically present, connected, functional, and not bypassed at the controller (a common shortcut that defeats the purpose).
Smart Controller (Weather-Based Controller)
A Wi-Fi-enabled controller that adjusts watering schedules using local weather data, soil moisture readings, or evapotranspiration calculations. According to EPA WaterSense, replacing a clock-based controller with a WaterSense-labeled smart controller can reduce irrigation water use by up to 30%, saving an average home roughly 15,000 gallons annually. During an inspection, the technician checks whether the smart features are actually enabled, since many homeowners install these units but run them in manual mode.
Phase 3: Zone-by-Zone Walkthrough
This is the most visible and time-consuming part of the inspection. The technician activates each zone individually and walks the yard observing every head. Here’s what they’re looking for.
Sprinkler Head Inspection
Each head is checked for physical damage (cracked or broken casings), clogging from dirt or debris, sunken positioning below turf level, and tilting caused by foot traffic or mower impact. The EPA estimates that 30 to 60% of irrigation water is wasted due to common system issues like leaks, broken heads, and poor scheduling.
Pop-Up Height
Pop-up heads need to rise high enough to clear the surrounding grass. A head that’s sunk below grade sprays directly into turf instead of over it, wasting water and creating a dead spot. The technician will flag any that need a riser extension or need to be raised to proper height. Our guide on common sprinkler issues covers this in more detail.
Arc and Radius Adjustment
Arc refers to the angle of the spray pattern (a half-circle, quarter-circle, or full circle). Radius is the throw distance. The technician adjusts both to keep water on your lawn and off sidewalks, driveways, fences, and building walls. This is one of the most frequent adjustments made during an inspection.
Head-to-Head Coverage
A design principle where each sprinkler head’s spray reaches the adjacent head. If head-to-head coverage has gaps (because a head was moved by landscaping, or a new bed was installed), you’ll see dry spots between heads. The technician identifies these gaps and recommends adding or relocating heads.
Misting and Fogging
When water comes out as a fine mist instead of solid streams or defined droplets, the system pressure is too high. Misting wastes enormous amounts of water to wind drift and evaporation, especially in West Texas where afternoon winds regularly exceed 20 mph. The EPA estimates that 63% of irrigation systems operate at pressures higher than recommended for their spray nozzles.
Overspray
Water hitting hardscapes like sidewalks, driveways, or streets. Besides the waste, overspray can trigger code violations in municipalities with strict watering ordinances. The technician adjusts arcs, swaps nozzles, or recommends repositioning heads to eliminate it.
Phase 4: Valve and Pressure Assessment
After walking every zone, the technician moves to the mechanical heart of the system: the valves and water pressure.
Zone Valve (Solenoid Valve)
Each zone has an electrically activated valve that opens when the controller sends a signal and closes when the signal stops. The technician confirms each valve opens fully (no weak flow) and closes completely (no water dribbling after the zone shuts off). A valve that won’t close is one of the most common causes of water waste and high bills. For deeper reading, see our valve and solenoid troubleshooting guide.
Valve Box
The underground housing that protects zone valves. The technician opens each valve box and checks for standing water (a sign of a slow leak), mud intrusion, ant nests, or root encroachment that could interfere with valve operation.
Water Pressure Test
Measured at the system’s point of connection using a pressure gauge. Sprinklers generally operate efficiently between 30 and 50 PSI. Anything above 50 PSI causes misting and accelerated wear on components. Anything below 30 PSI creates weak, uneven coverage. The technician records the static pressure (system off) and dynamic pressure (system running) for each zone.
Pressure Regulation
A device or built-in feature (some modern heads have pressure-regulated stems) that keeps pressure at optimal levels throughout the system. If your system runs hot and the technician finds misting across multiple zones, pressure regulation is usually the recommended fix.
Master Valve
A valve on the main supply line that shuts off all water to the irrigation system when no zones are running. This prevents water loss from a broken pipe or stuck valve when the system is idle. Lubbock ordinance requires a master valve on systems installed after 2006. The technician verifies it opens and closes properly.
Phase 5: Backflow Preventer Check
The backflow preventer is a compliance item, not just a maintenance task. It protects your home’s drinking water from contamination.
Backflow Preventer
A mechanical device that stops irrigation water (which may contain fertilizer, pesticides, or soil bacteria) from flowing backward into your potable water supply. Texas requires annual testing of backflow devices on most residential systems. A backflow preventer that has frozen or cracked over winter can fail silently, creating a public health risk. For full details on how licensed backflow testing works, we have a dedicated walkthrough.
Backflow Test
A certified tester connects differential pressure gauges to the device’s test ports and verifies it stops reverse flow at the required thresholds. The test takes roughly 15 to 30 minutes. Results are documented in a written report, and many Texas municipalities require that report to be filed with the local water authority.
BPAT (Backflow Prevention Assembly Tester)
The specific Texas license required for anyone performing backflow preventer tests. This is separate from an irrigator’s license. When scheduling your inspection, it’s worth confirming your provider holds both, so the full inspection and backflow test happen in one visit instead of requiring a second appointment with a subcontractor.
If you need to prepare for a backflow test, clearing access to the device and knowing its location ahead of time saves the technician time.
Phase 6: Leak Detection and Coverage Assessment
This phase often reveals the most expensive hidden problems.
Leak Check (Lateral Lines)
The technician looks for telltale signs of underground leaks: soggy spots that stay wet between watering days, erosion patterns around heads, unexplained pressure drops between zones, and areas of unusually lush growth (which indicate constant moisture). Even small leaks can waste over 6,000 gallons of water per month according to EPA WaterSense. For a deeper look at detection methods, our leak detection guide covers the topic thoroughly.
Catch-Can Test (Distribution Uniformity)
An optional, more detailed audit where the technician places small containers (catch cans) at regular intervals across a zone and runs it for a set time. The water collected in each can is measured to calculate how evenly the zone distributes water. Scores below 60% uniformity mean significant adjustment is needed. This test is especially valuable in West Texas, where Lubbock’s annual rainfall averages only 18 inches and the Ogallala Aquifer continues to decline.
Runoff and Cycle-and-Soak
If water runs off your lawn before it can absorb, the zone is applying water faster than the soil can take it in. The solution is called cycle-and-soak: splitting one long watering cycle into shorter segments with pauses between them, giving clay-heavy West Texas soils time to absorb each application.
Flow Monitoring
A technology upgrade that tracks real-time water flow through the system and sends automatic alerts for unusual usage patterns, which typically indicate a broken pipe, stuck valve, or clogged head. Flow monitoring transforms the traditional once-a-year inspection into continuous surveillance. Our article on how flow monitoring detects hidden leaks explains the technology in detail.
Phase 7: What Happens After the Inspection
The inspection itself is diagnostic. Here’s what comes next.
Inspection Report (Findings Summary)
A written list of every issue found, typically organized by zone and prioritized by urgency. A good report distinguishes between “fix now” items (active leaks, failed backflow preventer, broken main line) and “fix soon” items (worn nozzles, minor arc adjustments, aging heads). One HomeAdvisor reviewer described the best version of this: the technician walked through each zone explaining every adjustment, replacement, and fix, and made sure the homeowner understood the warranty and follow-up process.
Repair Estimate
A cost quote for the identified fixes, separate from the inspection fee. Some issues (head adjustments, nozzle cleaning, minor arc corrections) may be handled on the spot during the inspection. Larger repairs like valve replacements, pipe repairs, or controller upgrades will require a separate visit.
Seasonal Programming Update
The technician adjusts your controller’s schedules for the current season and local watering restrictions. This single step prevents a surprising amount of waste. Practitioners consistently report that outdated programming, not broken hardware, causes the majority of water waste they see in the field.
Maintenance Plan
A recurring service agreement that includes scheduled inspections, seasonal reprogramming, priority scheduling during busy months, and often discounts on parts and labor. A maintenance plan turns one-time inspections into ongoing system care.
If you’re comparing plan options, our maintenance plan comparison checklist breaks down what to look for.
How Long Does a Sprinkler System Inspection Take?
Plan for 60 to 90 minutes. A Texas irrigation practitioner at C&C Lawn & Irrigation notes that a 90-minute spring inspection prevents almost all of the major failures they see during summer. Resource Central’s evaluation program runs 75-minute sessions that cover inefficiencies, watering schedules, soil types, water distribution, and recommendations. Smaller systems (6 zones or fewer) may take closer to 45 minutes. Larger systems with 12 or more zones, especially those with older components or no system map, can run past 90 minutes.
What to Prepare Before the Technician Arrives
No ranking page on Google currently addresses this, so here’s a practical checklist:
Clear access to the controller. Move anything blocking the panel in your garage or utility room.
Locate your backflow preventer. It’s usually near the water meter or on an exterior wall. Remove any plants, mulch, or debris blocking it.
Turn on the water supply. If your irrigation has a dedicated shutoff valve, make sure it’s open.
Find your system map if you have one. Check your closing documents if you’re a recent homebuyer.
Note any symptoms you’ve observed: dry spots, soggy areas, zones that don’t run, unusual sounds, or higher-than-expected water bills.
Secure pets that might interfere with the technician working in the yard.
Questions to Ask Before You Schedule
Not all inspections are created equal. Ask these questions before booking:
Are you a licensed irrigator? Texas requires a license for irrigation work.
Do you hold a BPAT license? This determines whether the backflow test can happen during the same visit.
Will you provide a written inspection report? Verbal-only findings are easy to forget and impossible to compare against future inspections.
Do you check coverage patterns, or just individual heads? Head-to-head coverage analysis is what separates a thorough inspection from a quick walkthrough.
What’s included in the inspection fee versus billed separately? Minor adjustments during the visit are standard at some companies but extra at others.
For a more complete list, see our guide on questions to ask an irrigation specialist.
Why This Matters More in West Texas
Lubbock draws its water from the Ogallala Aquifer, one of the most critically depleted aquifers in the United States. With average annual rainfall of just 18 inches and mandatory two-day-per-week irrigation limits, every gallon that reaches your turf instead of evaporating, running off, or leaking underground has outsized value.
The EPA estimates that as much as 50% of outdoor water use is wasted due to overwatering caused by inefficiencies in irrigation systems. A well-maintained system can last 20 to 25 years. A neglected one wastes up to 25,000 gallons annually and fails years ahead of schedule.
A professional inspection is the single most efficient way to close that gap. It identifies the problems you can’t see, confirms your system complies with local ordinances, and gives you a clear, prioritized plan for getting everything running at peak efficiency.
Frequently Asked Questions
How much does a sprinkler system inspection cost?
Expect to pay between $50 and $120, with averages around $115 depending on system size and what’s included. Backflow testing may be bundled or charged separately. Repairs are always quoted as a separate line item after the inspection is complete.
Does a home inspection cover the sprinkler system?
Almost never. Irrigation systems fall outside the standards of practice for general home inspectors. If you’re buying a home with an existing system, schedule a dedicated irrigation inspection with a licensed irrigator.
How often should I have my sprinkler system inspected?
At minimum, once per year, ideally in spring before the heavy watering season begins. Properties with older systems, large zone counts, or mature trees near irrigation lines benefit from a second checkup in fall. Texas also requires annual backflow preventer testing.
Can I inspect my sprinkler system myself?
You can do a basic visual check: run each zone for a few minutes, look for broken heads, note dry spots, and check for overspray. But you won’t be able to perform voltage tests, OHMS tests, pressure readings, or a certified backflow test without professional tools and licensing. The DIY check catches surface problems. The professional inspection catches the hidden ones.
What’s the difference between a sprinkler system inspection and a fire sprinkler inspection?
A landscape irrigation inspection evaluates your lawn and garden watering system (heads, valves, controller, backflow preventer). A fire sprinkler inspection evaluates an indoor fire suppression system under NFPA 25 standards. They share a name but have nothing else in common.
How long does a typical inspection take?
Between 60 and 90 minutes for most residential systems. Smaller systems can be completed in 45 minutes. Systems with more than 12 zones or significant issues may take longer.
What happens if the inspection finds major problems?
The technician will document everything in a written report, prioritize issues by urgency, and provide a repair estimate. You decide what to fix and when. Critical items like active leaks or a failed backflow preventer should be addressed immediately. Cosmetic or efficiency upgrades can be scheduled at your convenience.
Is a backflow test included in a standard sprinkler inspection?
It depends on the provider. Some companies include it, others charge separately, and many subcontract it to a third party. Confirm before scheduling whether your technician holds a BPAT license and whether the backflow test is part of the inspection fee.
Comments