Irrigation Service & Repair in Denver, CO
Smart irrigation technology, expert system maintenance, and proven water conservation strategies that have saved hundreds of thousands of gallons for Denver properties since 1975.
Complete Irrigation Management for Denver Properties
Water is Colorado's most limited natural resource, and irrigation systems are the single largest controllable factor in your property's water consumption. JLS Landscape & Sprinkler provides full-service irrigation management that maximizes landscape health while minimizing water waste -- a balance we have been perfecting since 1975.
Our irrigation service team handles everything from spring activation and system evaluation to mid-season monitoring, damage repair, and fall winterization. For properties with aging or inefficient systems, we design and install upgrades that incorporate smart controllers, sensor technology, and drip conversion to dramatically reduce water consumption.
Whether you manage a 50-zone commercial campus or a residential property in Douglas County, our technicians bring the same diagnostic precision and water-saving expertise to every service call. We serve both commercial clients and residential homeowners expanding back into the Douglas County area. For broken sprinkler heads, leaking valves, or controller failures, visit our dedicated sprinkler repair page. You can also explore our smart irrigation guide for Colorado properties for tips on saving water.
Spring 2026 Update: With Colorado experiencing delayed warming patterns this spring, JLS recommends waiting until consistently above-freezing overnight temperatures before activating your irrigation system. Our technicians are currently scheduling spring activations and system evaluations for May and June. If your system sustained freeze damage from late-season storms, our sprinkler repair team can diagnose and repair issues during the same visit. Call 303-791-9121 to schedule your spring startup.
Smart Irrigation Systems That Save Water and Money
JLS specializes in advanced irrigation technology that responds to real-time conditions rather than running on a fixed timer. Our smart irrigation installations and upgrades consistently reduce water usage by 20-40% compared to conventional clock-based systems.
Signal-Based Smart Controllers
Wi-Fi connected controllers that receive real-time weather data and adjust watering schedules automatically. Monitor and control your system from any device, receive alerts for anomalies, and track water usage over time.
Historic ET Controllers
Evapotranspiration-based controllers calculate how much water your landscape actually needs based on historical climate data, plant type, soil conditions, slope, and sun exposure -- then deliver exactly that amount.
Rain and Freeze Sensors
Automatic shutoff when it rains or temperatures drop below freezing. These simple sensors prevent the most common form of water waste -- irrigating during or immediately after rainfall.
Soil Moisture Sensors
In-ground sensors measure actual root-zone moisture levels and communicate with the controller to water only when the soil needs it. Eliminates overwatering in shaded areas and ensures adequate moisture in exposed zones.
Wind Sensors
High winds cause sprinkler spray patterns to miss their targets and waste water through evaporation. Wind sensors pause irrigation during high-wind conditions and resume when conditions improve.
Flow Sensors and Leak Detection
Flow meters installed on the mainline detect abnormal water usage that indicates leaks, broken heads, or stuck valves. The system alerts property managers and can automatically shut down zones to prevent water waste and property damage.
Seasonal Irrigation Service Cycle
Colorado's dramatic seasonal shifts demand a disciplined irrigation service calendar. JLS manages your system through every phase of the year so you never have to wonder whether your irrigation is running correctly or wasting water.
Spring Activation
System startup, controller programming, zone-by-zone testing, head adjustment, and leak inspection after winter dormancy. Learn when to activate in our spring lawn care checklist for Denver.
Mid-Season Monitoring
Weekly inspections, run-time adjustments for heat waves, sensor calibration, and responsive repair for damage from mowing, vehicles, or weather.
Fall Winterization
Comprehensive winterization using compressed air to clear all water from pipes, valves, and backflow assemblies before the first hard freeze.
Winter Watering
Manual supplemental watering during dry winter periods to protect trees, shrubs, and perennials from desiccation damage caused by Colorado's arid winter conditions.
Water Conservation Strategies
JLS has saved hundreds of thousands of gallons of water for Denver-area properties through smart technology, drip conversion, and disciplined seasonal programming. Our approach aligns with EPA WaterSense guidelines and local water authority requirements.
- Drip irrigation conversion for planting beds, tree rings, and shrub zones
- Rotary nozzle upgrades that apply water more slowly for better soil absorption
- Seasonal programming adjustments -- spring run-times are different than August run-times
- Zone-specific scheduling based on sun exposure, soil type, and plant material
- Head-to-head coverage audits to eliminate dry spots and overspray
- Pressure regulation to prevent misting and wind drift
- Water budget tracking and monthly usage reporting for property managers
Backflow Prevention Testing and Denver Water Compliance
Denver Water and most Front Range water districts require annual backflow prevention testing for all commercial and residential irrigation systems. Backflow prevention devices protect the public water supply from contamination by preventing irrigation water -- which may contain fertilizers, pesticides, and soil bacteria -- from flowing back into the municipal system. Failure to comply with annual testing requirements can result in fines, water service shutoff, and liability exposure for property owners and managers.
JLS provides complete backflow prevention testing and certification as part of our irrigation service programs. Our technicians are certified backflow assembly testers who carry the credentials required by Denver Water, Castle Rock Water, and other Front Range municipal water authorities. We test reduced pressure zone (RPZ) assemblies, double check valve assemblies (DCVA), and pressure vacuum breakers (PVB) using calibrated test equipment and submit certification paperwork directly to your water provider on your behalf.
- Annual backflow testing scheduled alongside spring irrigation activation for efficiency
- Repair or replacement of failed assemblies performed on-site during the same service visit
- Direct submission of test reports to Denver Water, Douglas County water providers, and HOA management companies
- Freeze damage inspection and repair for backflow assemblies damaged during Colorado winters
- Compliance tracking and reminder scheduling so you never miss a testing deadline
For commercial properties with multiple backflow assemblies across large irrigation systems, JLS coordinates testing schedules that minimize disruption to landscape operations and ensure all devices pass before municipal deadlines. Properties that need backflow repair, replacement, or related sprinkler repairs can have everything addressed in a single service call, reducing downtime and cost.
Irrigation System Upgrades and Retrofits for Denver Properties
Many Denver irrigation systems installed during the building booms of the 1980s through early 2000s are reaching the end of their design life. Aging controllers, worn-out valves, and outdated spray nozzles waste water and create ongoing repair expenses that often exceed the cost of a strategic upgrade. JLS evaluates existing systems and recommends phased improvements that deliver immediate water savings without the cost of a complete system replacement.
One of the most impactful upgrades we perform is converting traditional fixed-spray nozzles to high-efficiency rotary nozzles. Rotary nozzles apply water at approximately one-third the rate of fixed sprays, allowing more time for the soil to absorb water before runoff occurs. On Denver's clay soils -- which absorb water slowly and shed excess moisture quickly -- this single change can reduce irrigation runoff by 30% or more while actually improving turf health by delivering water where roots can access it.
Controller upgrades represent another high-return investment. Replacing a mechanical timer with a Wi-Fi-connected smart controller gives property managers real-time visibility into irrigation run times, water consumption, and system alerts from any device. Smart controllers also integrate with rain sensors, freeze sensors, and soil moisture probes already installed on many Denver properties, creating an intelligent water management network that adjusts automatically to Colorado's rapidly changing weather conditions. JLS programs and monitors smart controllers for our maintenance clients, adjusting seasonal settings as conditions change rather than leaving the same programming running from April through October.
For properties with mixed landscape zones -- turf areas adjacent to planting beds, tree rings, or xeric rock gardens -- JLS designs zone separation and drip conversion plans that eliminate the inefficiency of watering all zones on the same schedule. Drip irrigation delivers water directly to root zones at low volume, reducing evaporation losses and keeping hardscape surfaces dry. Combined with proper pressure regulation and matched precipitation rate nozzles, these upgrades transform an outdated irrigation system into a water-efficient asset. Contact JLS at 303-791-9121 for an irrigation system evaluation and upgrade proposal.
Explore Our Other Services
Sprinkler Repair
Broken heads, leaking valves, controller issues, and zone failures diagnosed and repaired quickly by our experienced technicians.
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Winterization
Fall winterization to protect your irrigation system from freeze damage. Typically scheduled in October before Denver's first hard freeze.
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Landscape Maintenance
Comprehensive property care that integrates irrigation management with turf, plant, and hardscape maintenance year-round.
Learn MoreIrrigation Services FAQ
Smart irrigation systems typically reduce water consumption by 20-40% compared to conventional timer-based controllers. The exact savings depend on your current system efficiency, property size, and landscape composition. For a mid-size commercial property in Denver, this can translate to thousands of dollars in annual water cost savings. JLS has saved hundreds of thousands of gallons across our client portfolio since adopting smart irrigation technology.
Most Denver-area irrigation systems should be activated between mid-April and early May, depending on weather conditions. Starting too early risks freeze damage to pressurized components, while starting too late can stress new-season turf growth. JLS monitors weather forecasts and schedules activations when the risk of sustained hard freezes has passed for your specific area.
Commercial irrigation systems should be inspected at least monthly during the watering season, with more frequent checks during peak summer heat. Our maintenance clients receive weekly zone-by-zone inspections as part of their service agreement. Between inspections, smart controllers with flow sensors can alert us to problems like broken heads or mainline leaks in real time.
Yes. JLS is expanding back into residential services in the Douglas County area, including Castle Rock, Sedalia, Highlands Ranch, and surrounding communities. Residential homeowners can now access the same professional-grade irrigation service and sprinkler repair that our commercial clients have relied on for 50+ years. Call 303-791-9121 to schedule a residential irrigation service call.
