Sprinkler System Summer Maintenance Checklist

Five things to check on your sprinkler system mid-season: clean clogged nozzles, adjust your schedule for summer heat, inspect for sinking heads, fix leaks, and protect exposed heads.

⏱ 11 min read  ·  Last updated August 2026

Mid-season is the easiest time to miss problems with your sprinkler system. This checklist covers the five things every homeowner should do between June and August: cleaning clogged nozzles, checking coverage gaps, adjusting your watering schedule for the heat, inspecting for damaged or sinking heads, and protecting exposed heads before the mower clips them.

If you set your system up in spring and haven’t touched it since, you’re not alone. Most homeowners do. But summer is when your irrigation is working hardest, and it’s also when small problems quietly become expensive ones. A clogged nozzle wastes water. A sinking head gets sheared off by the mower blade. A bad schedule during a heat wave stresses your grass right when it needs the most help.

This isn’t a complicated checklist. You can run through most of it in under an hour, on a Saturday morning before the day heats up. Here’s what to look for.

Why Mid-Season Maintenance Actually Matters

Spring startup gets all the attention — winterizing too. But summer is when the system runs every day, and daily use means daily wear.

According to EPA WaterSense, landscape irrigation accounts for nearly one-third of all residential water use in the U.S. — about 9 billion gallons per day nationally. A poorly maintained system pushes that number higher for your household without giving you anything extra in return.

The GreenSpaces Coalition estimates that 30 to 60% of irrigation water gets wasted due to leaks, broken heads, and poor scheduling. Simple tune-ups can cut outdoor water use by 20 to 30% without changing anything about your landscaping.

The good news: most summer maintenance is visual inspection. You’re not digging anything up or replacing the controller. You’re catching problems while they’re still small.

The 5-Step Summer Sprinkler Checklist

Step 1: Run Every Zone and Watch It

The first thing I do every summer is stand outside while each zone runs and actually watch it. Not from the window — out there where you can see what each head is doing.

What to look for:

• Clogged nozzles: If a head is barely trickling or spraying in one direction instead of the full arc, the nozzle is dirty. Pop the head up manually, pull the nozzle out (it just unscrews), and rinse it under a tap. Takes two minutes.
• Misaligned heads: After a winter of ground shift and spring mowing, some heads end up spraying the driveway or the fence instead of the lawn. Most rotors have a small adjustment screw on top you can turn with a flat-head.
• Dry spots: If one part of the lawn looks consistently duller or browner than the rest, the coverage pattern isn’t reaching it. That’s usually a clogged head or a head that’s sunk too low.
• Flooding spots: Puddles that form every time a zone runs usually mean a head is stuck in the up position, or there’s a small break in the line near that head.

Run each zone for a full cycle. The whole walk-through takes 20 to 30 minutes, but it tells you more than any other step on this list.

Step 2: Adjust Your Schedule for Summer Heat

A schedule that worked perfectly in April won’t be enough in July.

As temperatures rise, evaporation and plant water demand both increase. If you’re running the same 15-minute cycles you set in spring, your lawn is probably coming up short by midsummer — especially Bermuda and St. Augustine, which need consistent moisture to stay green through heat.

A household with an automatic irrigation system that isn’t properly maintained can waste up to 25,000 gallons annually, per EPA WaterSense. And that’s before accounting for underwatering stress.

A few practical schedule adjustments for summer:

• Run in the early morning (before 8 AM) — wind is calm, evaporation is lowest, grass can dry before nightfall.
• Add 20 to 30% more run time on zones covering full-sun areas.
• If your controller has a “seasonal adjustment” or “water budget” setting, bump it up to 110–120% from May through August.
• If you have a smart controller with weather-based sensors, verify it’s reading local data correctly — some defaults are set for national averages that miss the regional heat.

Don’t just set and forget. Your schedule needs to change as summer progresses.

Step 3: Check and Clean Sprinkler Heads

Even a system that looks fine from a distance often has heads that need attention up close.

Here’s what to check on each head:

Nozzle filter: Most pop-up heads have a small mesh screen inside the body that filters debris. Over a full irrigation season, sediment builds up and restricts flow. Unscrew the nozzle, pull out the screen with needle-nose pliers, and rinse it under running water.

Head height: A head that sits more than a quarter-inch below grade will spray sideways across the turf instead of over it. If grass grows over the head or soil has settled around it, dig out a small area and adjust the riser. The head should pop up flush with or just slightly above the turf surface. If sinking is a recurring issue on a specific head, this breakdown of why sprinkler heads sink covers the soil and installation causes.

Arc and radius settings: Spray heads have a fixed arc, but rotors are adjustable. If a rotor is throwing water past its intended area, use the adjustment key to reduce the arc or radius.

Cracked or damaged bodies: This is the one that catches people off guard. A head can look fine at ground level but have a cracked body below the soil line that leaks every time the zone runs. Per Resource Central, a single broken head can waste 9 to 16 gallons per minute during a cycle. Multiply that by daily summer runs and the water bill starts making sense.

If you find a cracked head, replacement is straightforward. The head unscrews from the riser. Most hardware stores carry the common Rain Bird and Hunter models for a few dollars each.

Problem	Likely cause	Fix
Weak spray, small arc	Clogged nozzle screen	Remove, rinse, reinstall
Head stuck up after zone off	Debris in body	Flush zone by running briefly, check for seal wear
Head barely pops up	Clogged filter or low pressure	Clean filter; check zone valve if pressure is low
Puddle forming at head	Cracked body or stuck-open nozzle	Replace the head
Head spraying wrong direction	Arc setting shifted	Adjust with rotor key or flat-head screwdriver

Step 4: Protect Exposed Heads Before the Next Mow

This is the step most people skip — and the one that leads to the most expensive repairs.

According to LawnLove and HomeGuide, professional sprinkler head replacement runs $59 to $150 per head, including the service call. In a typical Sun Belt yard with 15 to 30 heads, even a couple of mower hits per season adds up fast.

Lawn mowers are the number-one cause of broken and cracked sprinkler heads, per Texas Rainmakers and other irrigation professionals. Mower wheels push heads out of alignment; blades clip the nozzle off heads that are sitting slightly high.

The fix I’ve had good results with is the Sprinkler-Guard by GRASSHOLE. It’s a patented flexible ABS ring (Flexible Advance ABS with UV Deterrent) that you press into the soil around the head. The mower blade deflects off the ring instead of the head, and the design inhibits grass and weeds from growing over the nozzle. (If grass coverage is already a problem at your heads, this guide on stopping grass from growing over sprinkler heads walks through the root causes.) Takes about 30 seconds per head to install. No tools.

If you have any exposed heads — especially ones near the edge of mowing paths or in areas where the grass tends to grow thick — summer is the right time to add protection before the wear season peaks.

You can find them at Sprinkler-Guard.com in 10-pack through 60-pack sizes. Most homeowners with 15 to 25 heads find a 20-pack covers the yard with a few spares to keep on hand.

The cheap fix usually costs the most over time. One service call to replace a mower-clipped head costs the same money as a 10-pack of Sprinkler-Guards.

Step 5: Check for Leaks and Wasted Water

The last item on the checklist is the most important for your water bill: a quick leak inspection.

Turn on each zone and walk the boundary of the coverage area. Look for:

• Geysers or high-pressure squirting from ground level — a broken lateral line, usually from foot traffic or a mower wheel driving over a shallow section.
• Soggy ground that doesn’t dry out between cycles — a slow leak, often a cracked head body or a valve that isn’t fully closing.
• A water meter that keeps spinning when all zones are off — that’s a definite sign of an underground leak somewhere in the system.

A small underground leak can waste up to 11,520 gallons per month, per Resource Central. In most Florida counties with tiered water pricing, that extra usage shows up in a hurry.

If you find a soggy spot but can’t locate the source, turn off the zone and wait 48 hours. If the ground dries normally, the issue is above ground (a slow-draining head or a valve that hesitates before closing). If it stays wet, there’s a subsurface issue worth getting a technician to look at.

Common Mistakes to Avoid Mid-Season

A few patterns I see repeated every summer:

Raising the mowing height and forgetting to check head heights. When you scalp the lawn in spring and let it grow taller in summer, heads that were flush in April may now be sitting an inch below the turf. Run a zone after your first tall-grass mow and verify pop-up height.

Ignoring one zone because “it seems fine.” A zone that’s partially clogged will look okay from a distance but won’t be delivering full coverage. If a zone has one or two weak heads, the grass in that area is running at a deficit you won’t notice until the lawn shows heat stress.

Setting it and forgetting the summer schedule bump. The most common mistake is not adjusting run times as temperatures peak. Your system should be running more in July than it was in May.

Skipping the leak check because the bill seems normal. Slow leaks often hide inside the tiered usage threshold. You’re paying more, but not so much that it jumps out.

How to Protect Your Sprinkler System for the Rest of Summer

Once the checklist is done, the main thing keeping your system running well through August is staying on it. A quick visual inspection every two weeks takes five minutes — just watch one or two zones run while you’re already outside.

Keep a few spare nozzles for your system’s brand on hand (they’re a couple of dollars each). If you find a cracked head, replace it the same day rather than letting it run another cycle while you wait for a parts order.

And if you haven’t already protected your exposed heads from mower damage, that’s the single best thing you can do before the peak of mowing season. Once a head gets clipped, you’re scheduling a service call or doing a DIY replacement. At $59 to $150 per head, preventing the hit is always cheaper than repairing it. For a full breakdown of what repairs typically run with a service call, see our sprinkler head repair cost guide.

Frequently Asked Questions

The Bottom Line

Summer maintenance doesn’t have to be complicated. Walk your zones, clean your nozzles, adjust your schedule for the heat, check for leaks, and protect any exposed heads before the mower gets to them.

Most of this takes less than an hour. The part that’s easy to skip — protecting your heads from mower damage — is also the part that saves the most money over a season. A single service call to replace a clipped head costs more than a 10-pack of protectors.

If you’re in the middle of mowing season and haven’t checked your heads yet, this Saturday morning is a good time to run through the list. Your grass will thank you by August.

Ready to protect your heads? Browse Sprinkler-Guard packs at Sprinkler-Guard.com — free shipping on orders over $100.

Last updated: August 2026. Statistics sourced from EPA WaterSense, Johns Hopkins Medicine, LawnStarter, LawnLove, HomeGuide, IBISWorld. Product specifications and pricing current as of publication date.