Restarting Your Sprinkler System: Spring Prep After Winter

Emily Jul 26, 2026

Spring is in the air, and it's time to start thinking about restarting your sprinkler system after the winter hiatus. A well-maintained sprinkler system ensures a lush, vibrant lawn through the growing season, but it needs careful attention after the cold months. Let's dive into the process of starting your sprinkler system after winter, step by step.

Turning On Sprinkler System After Winter
Turning On Sprinkler System After Winter

Before you dive into the process, make sure you have all the necessary tools. You'll need a screwdriver, a wrench, a shovel, a screwdriver, and some teflon tape for minor repairs. Also, having a sprinkler system manual specific to your system can be helpful. Now, let's get started!

how to winterize your sprinkler system
how to winterize your sprinkler system

Inspecting Your Sprinkler System

Before you turn on the water, it's crucial to inspect your sprinkler system for any damages that may have occurred during the winter. This includes checking for leaks, cracks, and freeze-thaw damage.

Winterizing Sprinklers - How to blow out sprinklers - Her Tool Belt
Winterizing Sprinklers - How to blow out sprinklers - Her Tool Belt

Start by examining your sprinkler heads. If any are damaged or missing, replace them. Also, ensure that the pop-up sprinkler heads retract properly. If not, you may need to clean them or replace the broken ones.

Checking for Leaks

How to Winterize a Sprinkler System
How to Winterize a Sprinkler System

Leaks can waste water and damage your lawn. To check for leaks, turn on each zone of your sprinkler system one at a time and observe the spray patterns. If water is pooling or spraying erratically, you may have a leak.

For hidden leaks, you can perform a pressure test. Turn off your sprinkler system and disconnect a sprinkler head from the mainline. Place your thumb over the opening to create pressure. If water bubbles out around your thumb, you have a leak in the mainline.

Checking the Backflow Preventer

How To Properly Winterize Your Sprinkler System For Accurate Maintenance
How To Properly Winterize Your Sprinkler System For Accurate Maintenance

The backflow preventer is a critical component of your sprinkler system. It's designed to prevent water from flowing back into the main water supply, which couldintroduce contaminants into the water supply.

To check the backflow preventer, first, shut off the water supply to your sprinkler system. Then, open the drainage valve at the bottom of the backflow preventer. If water doesn't flow out, it's time to have your backflow preventer professionally serviced.

Restarting Your Sprinkler System

How To Winterize A Sprinkler System [Infographic] - Yards Improved
How To Winterize A Sprinkler System [Infographic] - Yards Improved

Once you've inspected and repaired your sprinkler system, it's time to restart it. Start by turning the main water supply valve to your sprinkler system back on.

Next, turn on each zone of your sprinkler system one at a time. Let each zone run for a minute or so to remove any trapped air and ensure that all sprinkler heads are functioning correctly. If a zone isn't working properly, go back and re-inspect that zone.

Winterize Sprinkler Systems
Winterize Sprinkler Systems
a man standing on top of a lush green field next to a wooden fence with text over it that reads dad advice diy underground sprinker under $ 100
a man standing on top of a lush green field next to a wooden fence with text over it that reads dad advice diy underground sprinker under $ 100
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How to winterize a sprinkler system
How to winterize a sprinkler system

Setting Your Sprinkler System Timer

Sprinkler systems have specific watering needs based on the type and size of your lawn, local weather conditions, and evaporation rates. A general rule of thumb is to water your lawn about 1 inch per week, including rainfall.

To set your sprinkler system timer, first, determine how long it takes to apply 1 inch of water to your lawn. You can use a rain gauge or a coffee can with marked measurements. Once you know the run time for 1 inch of water, adjust your sprinkler system timer accordingly.

Seasonal Maintenance

Congratulations, your sprinkler system is up and running! But remember, regular maintenance is key to keeping your system in top shape.

Throughout the growing season, regularly inspect your sprinkler system for leaks or damages. Also, ensure that your sprinkler heads are properly aligned and providing even coverage. In the fall, remember to winterize your sprinkler system to prevent freeze-thaw damage.

Starting your sprinkler system after winter can seem daunting, but with careful inspection and regular maintenance, your system will reward you with a healthy, beautiful lawn all season long. So, grab your tools and let's get started! Happy spring!