Which Sprinkler-Guard size do you need? Learn how to measure your heads, which rotors need the 5-inch guard, and how pricing compares across all pack sizes.
⏱ 10 min read · Last updated July 2026
Ken Kwiatkowski
Founder of GRASSHOLE Corporation & inventor of the Sprinkler-Guard
Veteran. Florida homeowner who got tired of replacing the same broken sprinkler heads every season. Featured by Kevin Harrington (from Shark Tank). Recipient of the JMI 30 Award. Manufactures in Bradenton, Florida.
Full disclosure: GRASSHOLE Corporation manufactures the Sprinkler-Guard discussed in this guide. Our recommendations come from years of field testing and customer feedback.
Table of Contents
If your sprinkler heads measure 3 inches across the cap or smaller, you need the original 3-Inch Sprinkler-Guard. If you have rotors or larger pop-up heads that are wider than 3 inches — like Rain Bird 5000s or Hunter PGPs — the new 5-Inch Sprinkler-Guard is made for those. Measure the widest part of the retracted head first, then order the right size.
When Sprinkler-Guard launched the 5-inch size, the most common question was: how do I know which one I need?
It’s a fair question. Most homeowners have never measured a sprinkler head in their life. And if you’ve got a mix of zones — spray heads in some areas, rotors covering the wider stretches — you might need both.
This post covers exactly how to figure out which size you have, what each product is built for, how they compare on price per head across pack sizes, and where the 3-inch Covers fit into the picture.
You’ll have your answer in about five minutes.
How to Tell Which Size You Need
One measurement solves the whole question: the width of the sprinkler head cap measured straight across at its widest point, with the system off and the head fully retracted.
Not the nozzle. Not the riser. The outer cap — the flat surface that sits at ground level when the water’s not running.
- 3 inches or smaller across the cap → 3-Inch Sprinkler-Guard
- Wider than 3 inches across the cap → 5-Inch Sprinkler-Guard
That’s the whole rule. A tape measure and thirty seconds is all it takes.
Heads that typically fit the 3-Inch guard
Most standard pop-up spray heads fall into this category:
- Hunter Pro-Spray series
- Rain Bird 1800 series
- Orbit standard pop-up models
- Most fixed-pattern spray heads
These are the heads you usually find covering smaller zones — beds, narrow strips, areas close to the house.
Heads that typically need the 5-Inch guard
Rotor heads are the main reason the 5-inch exists:
- Rain Bird 5000 series
- Hunter PGP and Hunter I-20 rotors
- Most gear-driven rotor models with bodies wider than 3 inches
Rotors spin slowly to cover a wide arc. Their bodies are taller and wider than standard spray heads. If you’ve tried to set a 3-inch guard around a Rain Bird 5000, you already know the problem — the head doesn’t fit inside the opening.
If you’re not sure what type of head you have, run the system for a minute and watch. Spray heads pop up and shoot a fixed pattern. Rotors rise up and rotate slowly. You can also check out the breakdown in our post on rotor vs spray sprinkler heads if you want a closer look at the differences.
What if I have both types in my yard?
Most yards with a serious irrigation setup have spray heads in some zones and rotors in others. That’s normal. You’d order a pack of 3-inch guards for your spray zones and a pack of 5-inch guards for your rotor zones. They’re separate products on Sprinkler-Guard.com — order whatever combination covers your yard.
The 3-Inch Sprinkler-Guard (The Original)
This is the product that started everything. The 3-inch guard has been protecting pop-up spray heads in yards across the Sun Belt for years. It sits at ground level around the base of the head, takes the abuse from mower wheels and weed whacker hits, and keeps grass from creeping in and covering the cap.
How it works
The guard presses into the soil around the sprinkler head base. The inner opening — 3.5 inches — lets the head pop up and spray normally without restriction. The wider outer flange (7 inches across) spreads impact forces from mowing equipment before they can reach the head casing.
The material is Flexible Advance ABS with UV Deterrent — it flexes and absorbs hits rather than crumbling the way concrete donuts do. If a guard ever takes too much direct impact, you swap just that one out. The rest stay in place.
Pros
- Fits the most common pop-up spray head sizes
- Inhibits grass growth around the head base — one of the most useful features when you’re tired of the mower clipping heads buried in overgrown turf
- 30-second install, no tools required
- Available in packs up to 60 for whole-yard coverage at the lowest per-head price
- Patented design, Made in USA, Veteran-Owned
Cons
- Does not fit rotor heads wider than 3 inches
- Open at the top — the head area isn’t sealed when the system is off (that’s what the 3-inch Covers solve, covered below)
Best for
Any yard with standard pop-up spray heads. If every zone runs a Hunter Pro-Spray or Rain Bird 1800, this is your guard. It’s also the right choice for beds and tight spaces where smaller spray heads do the work.
Pricing
| Pack | Price | Per Guard |
|---|---|---|
| 10-pack | $64.99 | $6.50 |
| 20-pack | $125.00 | $6.25 |
| 30-pack | $180.00 | $6.00 |
| 60-pack | $350.00 | $5.83 |
Free shipping on orders over $100. The 20-pack is the most popular size — most residential yards have enough heads that the per-unit savings on the bigger packs add up fast.
At $6.50 per guard vs. $59 to $150 per professional head replacement per LawnLove, the math on protection pays out the first time a guard takes a hit that would have cracked a head.
The 5-Inch Sprinkler-Guard (For Rotors and Large Pop-Ups)
If you’ve got rotors in your yard, you’ve probably noticed that regular sprinkler protectors don’t work. The rotor body is too wide. The 3-inch opening is too small. Up until now, rotor owners didn’t have a clean solution.
The 5-inch guard is built specifically for those heads. Wider inner opening, taller cylindrical body, same Flexible ABS material, same push-in installation.
How it works
Same concept as the 3-inch, scaled up. The wider inner chamber accommodates rotor bodies that measure up to 5 inches across. The guard presses into the soil around the rotor base and protects it from mower and trimmer impact the same way the 3-inch protects spray heads. The taller cylindrical profile (instead of the 3-inch’s flat-disc shape) fits the taller rotor housing without blocking the rotation.
Pros
- Finally fills the gap for rotor zone protection
- Works with Rain Bird 5000, Hunter PGP, and most common gear-driven rotors
- Same 30-second push-in install, no tools
- Flexible ABS absorbs mower impact without shattering
Cons
- Not compatible with 3-inch Covers — the snap-on covers are sized for the 3-inch guard only
- Only available in packs up to 40 heads (not 60 like the 3-inch)
- Slightly higher per-head price than the 3-inch, reflecting the larger size
Best for
Rotor zones. If any part of your irrigation system uses gear-driven rotors to cover wider stretches of lawn — front yard, back yard, any zone where the head spins rather than sprays a fixed pattern — those heads need the 5-inch guard.
Good information for landscapers and contractors: if you’re protecting client systems with rotor heads, this is now an option. The 40-pack makes whole-system protection practical. See more on protecting your rotor heads with this specific size.
Pricing
| Pack | Price | Per Guard |
|---|---|---|
| 10-pack | $89.99 | $9.00 |
| 20-pack | $175.00 | $8.75 |
| 30-pack | $250.00 | $8.33 |
| 40-pack | $330.00 | $8.25 |
Orders through Sprinkler-Guard.com.
3-Inch Covers (The Off-Season Snap-On)
The Covers are a separate product from the guards — not a size option for the guard itself, but a seasonal add-on.
The 3-inch Covers snap directly over the 3-inch Sprinkler-Guard to seal the opening when the system isn’t running. Off-season, during a yard renovation, during an extended vacation — the Cover keeps debris, soil, and insects out of the head area.
A few things to know:
- Fit 3-inch guards only. They don’t fit the 5-inch guard’s larger opening. If you’re protecting rotor zones with 5-inch guards, there’s no snap-on cover for those yet.
- High-density polyethylene (HDPE). Rigid enough to hold its shape, flexible enough to snap on and off without tools.
- No soil install needed. You press them onto the existing guard when you shut the system down. Snap them off when you start the season back up.
For a closer look at how the Covers work alongside the guard system, see our post on sprinkler head covers.
Pricing
| Pack | Price | Per Cover |
|---|---|---|
| 10-pack | $29.99 | $3.00 |
| 20-pack | $54.99 | $2.75 |
| 30-pack | $79.99 | $2.67 |
| 60-pack | $149.99 | $2.50 |
If you already have 3-inch guards installed across your yard, a 60-pack of Covers is inexpensive seasonal insurance — especially in Florida where the system may run year-round but winter watering restrictions often reduce run time.
Side-by-Side Comparison
| Feature | 3-Inch Guard | 5-Inch Guard | 3-Inch Cover |
|---|---|---|---|
| Fits heads up to | 3 inches wide | 5 inches wide | Fits over 3-inch guard |
| Best for | Pop-up spray heads | Rotors, large pop-ups | Off-season seal on 3″ guard |
| Material | Flexible Advance ABS with UV Deterrent | Flexible ABS | High-density polyethylene (HDPE) |
| Install method | Push into soil | Push into soil | Snap onto existing 3″ guard |
| Install time | ~30 seconds | ~30 seconds | Seconds |
| Tools required | None | None | None |
| Pack sizes | 10, 20, 30, 60 | 10, 20, 30, 40 | 10, 20, 30, 60 |
| Starting price | $64.99 (10-pack) | $89.99 (10-pack) | $29.99 (10-pack) |
| Lowest per-unit cost | $5.83 (60-pack) | $8.25 (40-pack) | $2.50 (60-pack) |
| Works with snap-on Covers | Yes | No | — |
| Available at Sprinkler-Guard.com | Yes | Yes | Yes |
The Cost of Not Protecting Your Heads
The numbers on professional sprinkler repair are worth keeping in mind when you’re deciding on pack size.
Per LawnLove and HomeGuide, professional sprinkler head replacement typically runs $59 to $150 per head, and service companies charge $50 to $120 per hour in labor. A single service call to replace a mower-damaged rotor can easily run $100 to $150 when you add up parts and a minimum labor charge.
At $9.00 per 5-inch guard, the break-even point is simple: the guard pays for itself the first time it absorbs a hit that would have cracked a $100 rotor housing.
Most homeowners with rotor zones have at least 8 to 12 rotor heads in the yard. A 10-pack of 5-inch guards covers most of those systems at $89.99 total — less than the cost of a single professional service call to replace one damaged rotor head.
For spray head zones, the math is the same at a lower scale. A 20-pack of 3-inch guards at $125 covers most spray-only yards, and prevents replacement costs that LawnStarter estimates at $130 to $360 per annual repair incident.
You’re also not limited to buying all-at-once. If you want to start with the high-priority zones — the ones your mower passes closest to — a 10-pack of the appropriate size covers those first while you assess the rest.
The Verdict
For most yards, you’ll need both sizes.
If your system is all spray heads — standard pop-ups covering beds and smaller zones — you need the 3-inch guard. It’s the proven product with the widest pack options and the lowest per-unit price at higher quantities.
If you have any rotor zones — heads that spin and cover wider arcs — those need the 5-inch guard. The 3-inch opening is too small, and the rotor head won’t fit inside it.
For mixed-system yards, order the right size for each zone type. It’s two separate SKUs but the same 30-second install either way.
If you want to seal your spray head zones between watering seasons, add a pack of 3-inch Covers. They snap on in seconds and keep the head area protected when the system is idle.
The one thing Covers won’t do: fit on 5-inch guards. If you’re protecting rotor zones with the 5-inch, there’s no snap-on cover for those yet. Plan accordingly.
Find all three products at Sprinkler-Guard.com. The site shows current pack options and real-time stock.
Frequently Asked Questions
**Run a tape measure straight across the widest part of the head cap** when the system is off and the head is fully retracted. The cap is the flat surface that sits at ground level. If it measures 3 inches or less across, use the 3-inch Sprinkler-Guard. If it's wider than 3 inches — common with rotor heads — use the 5-inch guard. Most standard pop-up spray heads measure under 3 inches. Most rotors measure wider.
No. The 3-inch Covers are sized to snap over the 3-inch Sprinkler-Guard only. They don't fit the larger diameter opening of the 5-inch guard. If you're using 5-inch guards for your rotor zones, there's no snap-on cover available for those heads at this time.
Yes. The Rain Bird 5000 is one of the rotor models the 5-inch guard is designed for. The rotor body on the Rain Bird 5000 is too wide to fit inside the 3-inch guard's opening — the 5-inch inner chamber is the right size. The Hunter PGP and most other gear-driven rotors also fit the 5-inch.
Yes. Both push into the soil around the base of the sprinkler head. No tools needed, and install time is about 30 seconds per head. The main visible difference is that the 5-inch has a taller, more cylindrical body profile to accommodate the taller rotor housing. The 3-inch has the familiar flat-disc shape.
The 3-inch Sprinkler-Guard is made from **Flexible Advance ABS with UV Deterrent**. The 5-inch Sprinkler-Guard uses Flexible ABS. The 3-inch Covers are made from high-density polyethylene (HDPE) — a rigid snap-fit polymer. Each material choice is specific to what that product needs to do.
No. The guards sit at ground level around the outer base of the head. They don't touch the nozzle, the spray pattern adjustment, or the pop-up mechanism. Water flow and spray coverage are unchanged. The guard is purely a ground-level protector — nothing above the flange interferes with the head's operation. For more on this, see the full breakdown of the [best sprinkler head protectors](https://grassholesystem.com/best-sprinkler-head-protectors/).
Yes. Most yards with both spray and rotor zones need both sizes. You order the 3-inch guards for spray head zones and 5-inch guards for rotor zones. They're sold separately, and there's no minimum mixed order. Order whatever combination covers your specific zones.
Concrete donuts are heavy, tend to crack over time, and eventually sink into the soil until they're useless — [as documented by irrigation professionals](https://www.sprinklerbuddy.com/blog/index.php/sprinkler-donuts-2/). The Sprinkler-Guard uses flexible ABS instead of concrete. It absorbs mower and trimmer impact rather than shattering, and the design inhibits grass growth around the head. The Sprinkler-Guard also sits flush without settling into the soil the way concrete does. For a full breakdown of the differences, see our [concrete donuts vs. Sprinkler-Guard](https://grassholesystem.com/concrete-donuts-vs-sprinkler-guard/) comparison.
Yes. Both sizes — the 3-inch and 5-inch Sprinkler-Guard — are patented designs. They're Made in USA by a Veteran-Owned company based in Bradenton, Florida.
Turn the system on and watch the heads operate. Spray heads pop up and shoot water in a fixed arc or pattern — they don't move. Rotor heads rise up and rotate slowly, covering a wider sweep. Rotor bodies also tend to be taller and wider than spray heads. If you're still not sure, measure the cap diameter. Under 3 inches = 3-inch guard. Over 3 inches = 5-inch guard. Our post on [rotor vs spray sprinkler heads](https://grassholesystem.com/rotor-vs-spray-sprinkler-heads/) walks through the full identification process if you want to go deeper.
Not sure? The Sprinkler-Guard ships in 10/20/30/60-packs. If one ever takes too much abuse, you swap just that one in 30 seconds — no full system to replace.
Shop Sprinkler-Guard
- Starting at $64.99 for a 10-pack
- Free shipping on orders over $100
- 500+ five-star ratings from homeowners on Amazon
- Made in the USA by a Veteran-Owned Business in Bradenton, Florida
- Patented design — featured by Kevin Harrington (from Shark Tank)
- No tools required — installs in 30 seconds per head
- One-by-one swap design — if a guard takes too much abuse, swap just that one
Last updated: July 2026. Statistics sourced from EPA WaterSense, Johns Hopkins Medicine, LawnStarter, LawnLove, HomeGuide, IBISWorld. Product specifications and pricing current as of publication date.