How to Start Your Sprinkler System in Spring (Step-by-Step Checklist)

A proper spring sprinkler startup takes about an hour and follows eight steps: check the controller, inspect the backflow preventer, open the main valve slowly, run each zone manually, inspect every head, check for leaks, adjust spray patterns, and set your seasonal schedule. Skipping the startup risks cracked pipes, blown fittings, and wasted water.

Your sprinkler system has been sitting dormant for months. Pipes are cold. Seals are dry. And every fitting is just waiting for a pressure spike to test its limits. A proper sprinkler system spring startup is the difference between a smooth season and a $300 emergency call to your irrigation guy.

Most homeowners make the same mistake. They walk out, flip the valve wide open, and crank every zone at once. Then they wonder why water is gushing from a cracked fitting near the garage. Or why three heads aren’t popping up in the backyard. The fix is simple: follow a checklist, go slow, and catch problems before they get expensive.

This spring sprinkler startup checklist walks you through every step. It takes about an hour, costs nothing, and will save you real money. Let’s get your system running right.

What Should You Check Before Turning On Your Sprinkler System in Spring?

Before touching the main water valve, check two things: your controller settings and your backflow preventer. The controller tells your system when and how long to run. The backflow preventer keeps irrigation water from contaminating your drinking supply. Both need a quick inspection before you send water through the pipes.

Controller and Timer Checklist

Your controller is the brain of your sprinkler system. After months of sitting idle (or running on battery backup during a power outage), it needs a once-over. Here’s what to check:

1. Confirm the date and time are correct. Power outages reset cheap timers. Even a one-hour drift throws off your watering window.
2. Check the backup battery. If it’s a 9-volt, swap it. A dead battery means you lose your programming during the next storm.
3. Review your zone run times. Last summer’s schedule is too aggressive for early spring. Cut run times by about 30% until your lawn is actively growing.
4. Clear any rain delay settings left over from last season. Some controllers stay paused indefinitely until you manually clear the delay.
5. Test the manual run function. Press the manual button for one zone and confirm the display responds. If nothing happens, check the breaker or transformer.

Backflow Preventer Inspection

Your backflow preventer sits between your home’s water supply and your irrigation lines. It stops sprinkler water from flowing backward into your drinking water. In Florida, Texas, and most Sun Belt states, annual backflow testing is required by code.

Look at the device visually first. Check for cracks in the body, corrosion around the test ports, and any signs of leaking. If the handles are in the wrong position, don’t force them. Backflow preventers have a specific valve sequence. Open the downstream valve first, then the upstream valve. If you have a double-check or RPZ (reduced pressure zone) assembly, your municipality probably requires a certified tester to inspect it annually. Call your water department to confirm.

In many Florida counties, the backflow test is due between April and June. Georgia and the Carolinas typically require it by midsummer. Don’t skip this. The fine for a lapsed test is usually $50 to $150, and your water provider can shut off service.

How Do You Turn On a Sprinkler System After Winter Without Causing Damage?

Open the main irrigation valve a quarter turn at a time, waiting 30 seconds between each turn. This lets water fill the pipes slowly without creating a pressure spike. A sudden rush of water through empty pipes can crack PVC, blow glued fittings apart, and pop sprinkler heads right out of the ground.

This is the step that saves you hundreds of dollars. And it only takes about two minutes.

Step-by-Step Valve Opening Process

1. Locate your main irrigation shut-off valve. It’s usually near the backflow preventer or where the irrigation line branches off from your main water supply.
2. Turn the valve handle one quarter turn. You’ll hear water begin to trickle into the system. Stop here.
3. Wait 30 seconds. Let the water slowly pressurize the first section of pipe.
4. Turn another quarter turn. More water flows in. Listen for any unusual hissing or rushing sounds.
5. Wait another 30 seconds. Walk along any visible pipe runs and check for water bubbling up from the ground.
6. Continue quarter turns with 30-second pauses until the valve is fully open.
7. Check your water meter. If the dial is spinning fast with no zones running, you have a leak somewhere underground.

If you had your system winterized with compressed air, the pipes are completely empty. That means even more potential for a water hammer effect when pressure hits. Go extra slow.

Run Each Zone Manually

Once the valve is fully open, go to your controller and run each zone manually. Start with Zone 1, let it run for two minutes, and watch. Then move to Zone 2. Walk the yard as each zone runs.

You’re looking for geysers (broken heads), dry spots (clogged nozzles), flooding (cracked pipes underground), and any heads that don’t pop up at all. Make notes as you go. A simple list on your phone works fine. This is your spring damage report, and you’ll use it to prioritize repairs.

In Texas and the Southeast, clay soil expands and contracts through the winter. That movement puts stress on fittings and connections. If you’re in DFW, Houston, or anywhere with heavy clay, pay extra attention to zones near foundations and sidewalks. That’s where pipe movement causes the most problems.

What Should You Look for When Inspecting Sprinkler Heads in Spring?

Check every head for four problems: cracked bodies, sunken risers, grass or dirt overgrowth, and tilted spray angles. Spring is when you discover everything that went wrong over the winter. Freeze damage, soil settling, foot traffic, and lawn equipment all take their toll. A thorough head-by-head inspection now prevents wasted water and dead spots all season.

Cracked or Broken Heads

A cracked sprinkler head leaks water around the base instead of spraying through the nozzle. You’ll see pooling, mud, or a weak, lopsided spray pattern. Most cracks come from mower strikes, foot traffic, or freeze cycles. If the body is cracked, the head needs replacing. No amount of tape or glue fixes a cracked pop-up body. Check our guide on signs your sprinkler heads need replacing for the full list of symptoms.

Sunken Heads

Soil compacts over time, especially in sandy Florida soil and red Georgia clay. When a head sinks below grade, the spray hits the surrounding grass instead of arcing over the lawn. The nozzle gets clogged with dirt. And good luck finding it once the grass grows in. If your sprinkler heads keep sinking, it’s usually a riser length issue or missing support at the base.

Buried and Overgrown Heads

St. Augustine grass in Florida can swallow a sprinkler head in a single growing season. Bermuda in Texas does the same thing. If you can’t find a head that’s supposed to be there, check our guide on how to find hidden sprinkler heads. You might need to run the zone and watch for water seeping up through the turf.

Heads That Won’t Pop Up

A head that stays flush with the ground when the zone runs is either stuck, broken internally, or buried too deep. Dirt gets into the riser mechanism and jams it. Sometimes a good cleaning fixes it. Sometimes the internal spring is shot. Our guide on sprinkler heads that won’t pop up covers the fix for each cause.

How Sprinkler-Guard Makes Spring Inspection Easier

If you installed Sprinkler-Guard protectors last season, your spring inspection just got easier. Every head is visible, sitting inside a bright protective ring that grass can’t overgrow. No hunting through thick St. Augustine. No mystery sunken heads. And because the guards deflect mower blades and trimmer line away from the head body, you’ll find fewer cracked or broken heads to replace.

That’s the whole point. Protect them before winter, and spring startup takes half the time.

How Do You Check for Leaks and Adjust Spray Patterns?

Run each zone for two to three minutes while you walk the full coverage area. Look for water bubbling up from underground (cracked pipe or fitting), pooling around head bases (bad seal or cracked body), and spray hitting driveways, sidewalks, or the house. Fix leaks first, then adjust patterns.

Finding Leaks

Underground leaks show up as soggy patches, unexplained muddy spots, or areas where grass is noticeably greener and taller than the surrounding lawn. Check every fitting you can see: connections at valve boxes, at the backflow preventer, and at each sprinkler head. A fitting that drips when the zone is running needs a wrench. Hand-tighten first, then a quarter turn with pliers. Don’t overtighten PVC fittings. They crack.

If your water meter keeps spinning after you shut off all zones, you have a leak between the meter and your valves. That’s usually a main line problem and might need a pro.

Adjusting Spray Patterns

Heads shift over the winter from freeze-thaw cycles and soil movement. A head that was aimed perfectly last August might now be watering the sidewalk. Use a flat-head screwdriver to adjust the arc and radius on each head. Most pop-ups have a small screw on top of the nozzle for radius adjustment and a tab or ring for arc setting.

Check our guide on adjusting sprinkler heads for better coverage for brand-specific instructions. And if a head keeps watering the sidewalk no matter how you adjust it, it might be installed at the wrong angle or in the wrong location.

What Is the Best Spring Watering Schedule for Your Lawn?

Water two days per week, early morning between 4 AM and 8 AM, for 15 to 25 minutes per zone depending on your grass type. Spring lawns need less water than summer lawns. Overwatering in spring promotes fungus, shallow roots, and wasted money. Start light and increase as temperatures climb into the 80s.

Grass Type	Days Per Week	Minutes Per Zone	Best Time
Bermuda	2	15-20	4-8 AM
St. Augustine	2	20-25	4-8 AM
Zoysia	2	15-20	4-8 AM
Fescue (cool-season)	2-3	20-25	4-8 AM

For a deeper look at timing, check our guide on the best time to water your lawn.

Local Watering Restrictions

If you live in Florida, your watering days are set by your water management district, not by you. Most of the state follows a two-day-per-week schedule based on your address (odd/even). The schedule shifts between Eastern Daylight Time and standard time, and the allowed hours are typically before 10 AM or after 4 PM. Check our updated guide on Florida watering restrictions for 2026 for your district’s rules.

Texas counties vary widely. Houston allows twice-a-week watering year-round. San Antonio restricts to once a week during drought conditions. Dallas has seasonal schedules. Georgia is similar. Metro Atlanta often goes to odd/even watering during summer restrictions. Program your controller to match your local rules before you set it and forget it.

Pro tip: many newer controllers have smart scheduling that accounts for local restrictions. If yours doesn’t, tape the allowed days to the inside of the controller box so you don’t have to look it up every time you reprogram.

Seasonal Schedule Programming

Spring isn’t summer. Don’t program your summer schedule in April. Start with two days per week and shorter run times. Your lawn is just waking up. Roots are shallow from winter dormancy. Too much water this early creates fungus problems (especially in Florida’s humidity) and encourages weeds.

Bump up watering by one day and five minutes per zone once nighttime temperatures consistently stay above 65 degrees. In the Sun Belt, that usually happens by late May. In the Carolinas, closer to June.

How Do You Protect Sprinkler Heads Before the First Mow of the Season?

Once your spring inspection is done and every head is running right, protect them before you mow. That first mow of the season is when heads get hit the hardest. Grass is tall, visibility is low, and it’s been months since you thought about where each head sits. One pass with the mower and you’re replacing a head you just inspected.

Sprinkler-Guard solves this. It’s a flexible ABS plastic ring that fits around any pop-up sprinkler head up to 3 inches. You press it into the ground around the head. No tools. No digging. Takes about 30 seconds per head.

The guard does three things. It deflects mower blades away from the sprinkler body. It stops trimmer line from cracking the head. And it prevents grass from growing over and burying the head. That last one matters more than most people realize. Buried heads don’t spray. They clog, they get stuck, and they cost $15 to $25 each to replace, plus the service call if you can’t do it yourself.

Sprinkler-Guard is veteran-owned and made in Bradenton, Florida. The design is patented. It’s not a concrete donut that cracks and sinks. It’s not a cheap plastic ring that breaks. It’s built to last for years and stay put in any soil type. Check out our comparison of concrete donuts vs. Sprinkler-Guard if you’re weighing your options.

For more detail on protecting your heads from mower damage, read our full guide on how to protect sprinkler heads from lawn mowers. And if you want to adjust your mowing technique around heads, we cover that in how to mow around sprinkler heads.

Should You DIY Your Spring Startup or Hire a Pro?

Most homeowners can handle a spring sprinkler startup themselves. The tools you need are a flat-head screwdriver, an adjustable wrench, and about an hour. If you can change a light switch, you can do this. Hiring a pro makes sense for backflow certification, buried valve repairs, and anything involving the main line.

What You Can DIY

• Opening the main valve and pressurizing the system
• Running each zone and walking the yard
• Replacing broken sprinkler heads (it’s a 10-minute job, check our DIY sprinkler head replacement guide)
• Cleaning clogged nozzles and filters
• Adjusting spray arc and radius
• Installing Sprinkler-Guard protectors around each head
• Programming your controller for the spring schedule
• Tightening loose fittings at accessible connections

When to Call a Pro

• Backflow preventer certification (required by most municipalities, needs a licensed tester)
• Broken main line or lateral pipe underground
• Valve solenoid replacement (requires digging into valve boxes and wiring)
• Controller wiring problems (zones that won’t activate from the controller but work manually)
• Persistent leaks you can’t locate

A typical professional spring startup service call runs $75 to $150. That includes pressurizing the system, running zones, basic adjustments, and a written report of any damage found. But if you’ve already done those steps yourself, you already know what’s broken. You can skip the service call and go straight to a targeted repair. Check our sprinkler head repair cost breakdown to know what you should be paying.

And here’s the thing. The more you maintain your own system, the more money you save. Sprinkler heads typically last 5 to 10 years with proper care. But lawn equipment damage cuts that lifespan in half. Protecting your heads with Sprinkler-Guard right after spring startup keeps them running longer and keeps your repair bill lower.

The Bottom Line

An hour of spring startup saves you hundreds in emergency pipe repairs, wasted water, and irrigation service calls. Go slow on the valve. Run every zone. Walk the yard. Check every head. Adjust your schedule for spring, not summer. And fix what’s broken before you mow for the first time. That’s it. That’s the whole checklist.

And once everything is running, protect those heads before the mower comes out. A Sprinkler-Guard 20-pack covers most yards, installs in under 15 minutes total, and means next spring’s startup will be faster, cheaper, and a lot less stressful. Your sprinkler system works hard all summer. Give it the right start this spring.

Written by Ken Kwiatkowski, founder of Sprinkler-Guard and U.S. Army veteran. Protecting sprinkler systems since 2019.

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Sprinkler-Guard. Made in the USA. Veteran-owned. Patented.