Understanding Sprinkler Head Types and When to Use Each One

You could walk into almost any irrigation supply store and be overwhelmed by an entire wall of sprinkler heads. With dozens of options that all seem to spray water on grass at different levels, it’s hard to understand why these various types exist in the first place; which ones are right for each job? Misapplication is critical, leading to dead grass and wasting water if the wrong types are used in the wrong areas.

Taking time to learn which type works best under which conditions creates an irrigation system that effectively waters, not merely one that throws spray and hopes for the best.

Fixed Spray Heads: Workhorses for Smaller Areas

Fixed spray heads do just that: spray water (in a pattern) without moving. These heads are the most basic sprinkler head type and the most common in residential settings.

Fixed spray heads operate in smaller areas (therefore more effective at effective coverage) with relatively close distances. Full circle coverage, half circles, quarter circles, and other arcs makes them versatile. They also provide quick application, which helps create a shorter run time than other heads.

However, because they’re outputting a fine mist, they’re susceptible to wind. Wind can carry the spray away from the intended area creating wasted water and ineffective coverage. Thus, they should be used in protected areas or areas without high winds often. For example, an effective home irrigation system would utilize fixed spray heads in tight spaces like narrow side yards or small planter areas, even next to buildings to avoid over-spraying on sidewalks and pathways where the larger patterns would be a waste.

Rotary Nozzles: The Middle Ground

Rotary nozzles look like fixed spray heads but operate differently. Instead of having a steady stream of water that shoots out, rotary nozzles have a rotating stream that slowly moves back and forth along its plane. Rotary nozzles are a happy medium between spray heads and rotors.

Rotary nozzles apply water at a much slower pace than fixed spray heads, allowing time for the soil to absorb water without runoff. They’re more efficient with water application and work better in windy circumstances because a thicker stream is blowing out instead of a fine mist.

In addition, rotary nozzles can cover the same distances as fixed spray heads but do it more efficiently. They are particularly beneficial on sloped areas where running water application can send runoff down the slope, and on clay soils, which absorb water poorly, further necessitating a slower implementation pace. The downside is longer run times with rotary nozzles but generally the efficiency makes up for it.

Rotor Heads: Designed for Great Open Areas

Rotors (or rotor heads or gear-driven heads) are the biggest workhorses when it comes to sprinkler head options. They have a mechanism inside that rotates the head in one direction on a plane so one sprinkler covers a lot more area than any other head type.

Rotors cover area much larger than any other option making them appropriate for large lawns, fields, parks, and more. Like rotary nozzles, they apply water slowly yet effectively – however, this also means longer run times. The rotating mechanism spreads water more evenly than fixed spray heads or rotary nozzles with specific patterns.

With wind, rotors make an easier task from an application standpoint – heavier streams are more difficult for wind to carry. They’re also more durable as less clogs occur (larger openings for passage) and they have a greater recommended distance for placement between units (3′-12′ radius). The downside is too much distance – they operate better in wider spaces than shorter spaces, as their spray can create unwanted coverage.

Drip Irrigation: For Planting

Drip irrigation is something entirely different – from small emitters planted into the ground to distribute water rather than spraying it into the air.

This application is incredibly efficient with almost no waste going to evaporation or overspray scenarios and functions well in flower beds, vegetable gardens, shrub areas and anywhere that needs specific plant watering without watering the areas between them where no plants grow.

Emitters come with different flow rates depending on plant size (lower flow for flowers/smaller plants, larger flow for shrubs). As this method applies water slowly also there’s a longer run time but it helps cultivate soil deeper into the root zone without runoff escape.

Bubblers: For Trees/Larger Shrubs

Bubblers are high-flow emissions used for specific trees or shrubs. They create a bubbling/flooding effect so that if you want/need an established tree to get extra deep watering because it’s there forever – and can take a lot of water in one go – this is the way to go through your application method. They work well at great volumes for better established trees as deep watering can occur as long as they’re graded at some point so large flows don’t escape from above ground vegetation levels into uneven grading plains.

This does not work on lawns or ground cover or small plants – there needs to be grading/berms around plants that need this specific application wherever you want to contain it – so it’s not necessarily generalizable but very specific.

Impact Heads: Old Reliable

Impact heads are essentially your tried-and-true workable option since day one that go “chick-chick-chick” while they rotate. These use spring-loaded arms to get hit by the water and then rotate into place like a step motion over time.

Impact heads are durable like rotors and work better with poor quality water that may clog other systems. They cover larger areas similar to rotors but they’re still not as aesthetically pleasing – applying less uniformity while doing so – and they’re noisier than the rest as well. It’s unlikely many homeowners will still incorporate impact heads but those with agricultural methods or sport fields would ideally use this option based on durability and reliability during sometimes less-than-ideal situations instead of beauty and sound concerns.

Utilizing Heads for Specific Situations

Effective irrigation will strive to match head types to proper areas instead of utilizing ONE type everywhere you think it could work – the idea is that it won’t work appropriately everywhere anyway!

Lawns will benefit from rotary nozzles or rotors (dependent upon size). Smaller lawns will thrive on rotary nozzles; larger lawns will need coverage radius by rotors; oddly shaped lawns may require a mixture of both to get effective coverage without overlap (especially if cyclical coverage ideas are present).

Planting beds will benefit almost always from drip irrigation – as they need foliage kept dry instead of creating replacement plants – and this avoids weed growth as well since gaps grow where plants don’t exist as that area gets watered instead; ground cover may fill in (like grass in a lawn area), benefiting from spray heads or rotary nozzles instead.

Slopes need slower application rates or else they’ll watch water runoff down the edge like it’s nothing! Rotary nozzles or rotors work better than fixed sprays here since the slower water application gives soil time to absorb moisture instead of struggling against the tilt of gravity!

Pressure Considerations

Different head types operate better at different pressure applications – fixed sprays require lower pressure, rotary sprays require medium pressures and rotors typically require higher pressure (but there are various types!).

Unfortunate circumstances come about when utilizing heads that don’t match your system with pressure – too little creates sad coverage, too much creates pressure misting that’s uneven AND blades die quicker under excess misting conditions which are inappropriate in general anyway! Since heads need various spacing they’re only appropriate amongst themselves within zones with similar pressure needs – not across the board!

Making Your Determination

Choosing sprinkler heads isn’t about finding the one best type; it’s about fitting your needs up against what’s available per area parameters! Coverage area/positioning/frequency/aquatic application distinction – every factor matters when determining how best to place your heads for success.

Professionally designed plans accommodate placement with all types; DIY installation assumes whatever’s easiest works when it doesn’t always quite so. Professionally designed irrigation systems use less water even while using equivalent square footage due to somewhat better coverage over time.