Upgrading Irrigation Systems

Upgrading an existing irrigation system is a smart way to improve water efficiency, reduce maintenance issues, and help older sprinkler systems perform more reliably. Greenlist carries professional-grade irrigation products that can help homeowners and contractors replace outdated sprinkler heads, install smart controllers, add drip irrigation, and improve pressure regulation across the property.

Step 1 - Design the Layout

Upgrading an older irrigation system requires identifying hidden inefficiencies before swapping hardware. Follow these three diagnostic design rules to audit your system performance and prioritize your retrofits.

Isolate Your Main Pressure Loss: Walk your zones while they are running. If you see heads sputtering, failing to pop up fully, or weeping water at the base, your system is losing pressure. Plan to replace leaky, worn-out spray body seals first to restore optimal line velocity across the entire circuit.
Audit Your Nozzle Performance: Look for uneven coverage or overspray. If your current nozzles are creating a cloud of fine mist that blows away in the wind, your water pressure is too high. Map out zones that require pressure-regulating upgrades or high-efficiency rotary retrofits to keep water on the grass.
Convert High-Waste Zones to Drip: Identify flower beds, shrubs, or dense landscape islands currently watered by traditional pop-up sprays. Because plants grow and block spray paths over time, plan to cap off those traditional heads and run low-flow drip lines directly through the mulch beds instead.

Step 2 - Choose Your Equipment

With your weak points audited, select your upgrade components. Work through the checklist for your controller, retrofit heads, and conversion tools.

1. Upgrade Your System Brain (The Controller)

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Pro Tip: Replace old manual dial timers with a smart controller. Choose a Wi-Fi model that reads real-time local weather and skips cycles during rain, wind, or freezing temperatures.

2. Select High-Efficiency Heads & Retrofit Nozzles

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Pro Tip: PRS (pressure-regulated) spray bodies hold internal pressure to a steady 30 PSI and cut water waste. Pair them with multi-stream rotary nozzles to trade drifting mist for heavy, wind-resistant streams.

3. Secure Spray-to-Drip Conversion Kits & Tools

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Pro Tip: You don't need to dig up the yard to add drip. A spray-to-drip retrofit kit screws onto your existing 1/2" sprinkler risers and converts the zone in place, with a built-in pressure regulator and mesh filter.

Step 3 - Install Everything

Components on-site and ready to deploy? Follow this sequence to swap parts, wire the new controller, and tune the system.

Swap the controller. Take a photo of your old controller's zone wiring for reference. Mount the new smart Wi-Fi timer, match each zone wire to the new terminal slots, and sync the app to your home network.
Retrofit the heads and convert zones. Unthread the old leaking spray bodies and hand-tighten your new pressure-regulating bodies onto the existing risers. For bed conversions, remove the spray head, install the spray-to-drip cap, and run new 1/2" drip tubing down the mulch line.
Flush, tune, and adjust schedules. Run each upgraded zone for 10 seconds without nozzle tips to flush debris loosened during install. Thread on your high-efficiency nozzles, then update the app for your low-flow upgrades — rotary nozzles apply water slower, so they need longer run times. Then check it off your Greenlist.

Irrigation Tools

Plan your irrigation project with confidence using our irrigation tools to ensure perfect water pressure, matched precipitation, and optimized run times.

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