How Many Sprinkler Heads Per Zone | Details On Sprinkler Heads


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Sprinkler systems are a great way to irrigate your yard and keep it green, even in the dry heat of summer. A sprinkler system is also a great way to save water bills. Keeping your lawn green and healthy with a sprinkler system instead of a hose saves money on water bills and prevents pests like mosquitoes from breeding in stagnant pools of water that might otherwise develop after rainfall. Sprinkler systems come with different numbers of zones and heads. So, how many heads per zone do you need?

It depends on the size of your yard and how much watering capacity you want from your sprinklers. A single zone has one set of pipes that feed one set of sprinklers. If you have two separate yards — one for the front and one for the back — with their own access points, then you’ll need two zones with one head each to cover both yards.

How Many Sprinkler Heads per Pipe Size

If you’re using a flow-control valve and have enough water pressure, you could add up to 4 heads per zone. Using a pressure-boosting system, you could add up to 6 heads per zone. Depending on the model and manufacturer, each head will consume anywhere from 1 to 10 GPM water. On average, you can expect each head to use 3 GPM, which is the maximum flow rate for most water heaters.

What is the Sprinkler Head per Zone?

What is the Sprinkler Head per Zone?

This parameter indicates how quickly water flows through your pipes. Depending on the water pressure, the sprinkler will employ a different amount of water. The standard pressure setting for sprinkler systems is 30 pounds per square inch. However, you must be familiar with your system’s specific requirements.

If your water pressure is low, you will need to conduct some research. The water pressure regulator may be faulty. Comprehending its relevance to your choice is only half the battle. The remaining portion consists of self-testing. It requires specialized equipment to accomplish this. You must purchase a pressure gauge.

First, turn off all of the house’s water faucets. Connect the pressure gauge to the water fixture closest to the water meter. Therefore, activate the water supply by turning the faucet on. You are holding the water pressure gauge.

How Sprinkler Heads and Zones Work

How Sprinkler Heads and Zones Work

Each region comes into zones according to its specific watering needs. Each zone will have various sprinkler heads and watering systems to ensure uniform watering. By planting shrubs and bushes instead of grass, you can decrease the water you must provide. The irrigation expert will consider how much sunlight the area receives.

If you divide your lawn or garden into zones and strategically place different sprinkler heads, there is no need to over- or under-water it. Grass requires more water than densely packed shrubs.

An irrigation system designer will strategically place sprinkler heads, or “zones,” across the lawn to ensure uniform water distribution. In addition, you must calculate the total system to ensure that you do not waste water or cause damage to your home’s plumbing by using more water than it can safely handle.
If you want to give your plants exactly what they need when they need it, you can further customize each zone by installing different sprinkler heads within it.

Gallons Per Minute

The first important measurement is that you should measure your irrigation systems’ capability and water supply flow rate, measured in gallons per minute. You can easily measure it by the bucket size you use in this process, like a 5-gallon bucket.

  • Please turn off any water source inside and outside the house, put the bucket under the exterior faucet, and turn it on fully. Measure how long it takes in seconds to fill up the bucket.
  • Now calculate the flow rate by multiplying the bucket size by 60 and dividing the time by seconds. Consider the example of a 5-gallon bucket; if it takes 18 seconds to fill, then 5X 60/18= 16.67 GPM.
  • But the sprinkler systems use water approximately 20 gallons per minute in one month.

Pounds per square inch

  • To measure the water pressure, you have to do a few calculations, but the process needs special equipment, like a pressure gauge.
  • Correct the water pressure measurement and connect the pressure gauge to the outside faucet, close to the water meter.
  • Crank the tap fully and turn off all the water sources inside and outside. Now record the readings on a pressure gauge that should be in pounds per square inch. Alternatively, you can hire the water management district and company to know about it. 
  • The PSI will help you to understand what type of sprinkler heads will work for your water supply. It would help if you didn’t use the sprinkler heads in which the OSI range is over and under your water system.

Calculations of Zones

You must calculate how many sprinkler heads you require before figuring out how many to put in each zone. 

  • You must map your lawn and calculate the sprinkler heads you need for the direction and spray distance. 
  • The plants for similar needs should be in each zone or your lawn.
  • Then sum up the GPM flow rate of all the sprinkler heads, and divide it by the GPM of your water supply. 
  • The result will show how many zones you will need. Consider the example if one sprinkler head will require a rate of flow of 1.31 GPM and 20 of them, then you will need 26.2 GPM in total.
  • On the other hand, if your system can hold only 16.67, you will need two more zones to cover the lawn’s specified area. 

Effective Zoning

According to manufacturers’ information, if your sprinklers are weak regularly, project the watering schedule at a shorter distance.

  • You may have too many sprinkler heads in one zone because a zone can simultaneously work at all the sprinkler heads on it.
  • If you put too many on one spot, it will lower the water pressure for each sprinkler head. Suppose you know its alarming performance and decrease in the number of heads in the affected zone.
  • Please do not use sprinkler heads of different flow rates because they use different amounts of water simultaneously or the heads are at different elevation levels. 

Nozzles of sprinkler heads

  • The sprinkler’s nozzles are also known as spray nozzles; they have the importance of their own but are often overlooked elements of a well-designed irrigation system.
  • The perfect nozzles ensure the correct water delivery to your yard according to your need. 
  • Hunter sprinkler heads offer an assortment of nozzles and revolutionary MP Rotator nozzles. But do not reduce or adjust the rotor nozzle for throwing at the distance of any sprays more than 25% as recommended by the product manufacturers.
  • Moreover, you can increase the water pressure for sprinklers by removing a few sprinkler heads from each zone in your irrigation system and capping the plumbing that leads to them.
  • If you decrease the number of sprinkler heads, it will increase the water pressure in the sprinklers.
  • You can also go for a booster pump on the main irrigation line.
  • The rain shutoff devices also work well in irrigation systems, and people worldwide use them.
  • These are also known as Rain sensors and are best for interrupting the cycle of an automatic irrigation system controller when a particular amount of rainfall is in the way. 
  • These are small devices attached to the irrigation system controller and installed in an open area expected to rain. These devices can work best in irrigation systems, saving between 3 to 15% of the system’s annual operating expenses. 
  • The sprinklers usually lose most of the water to evaporation because they spray water through the air and over a wide area. However, other factors also affect water evaporation rates. The gardeners can reduce the evaporation rate by applying water irrigation timings, mulching, and other cultural methods.

Why Use Sprinkler

Sprinkler irrigation is prevalent due to its low cost, versatility, and adaptability to various crop types. Unfortunately, the irrigation system has some flaws. Spray irrigation is one of the least efficient watering methods, as you lose up to 50 percent of the water to runoff and evaporation.

Crops, lawns, landscapes, and golf courses are irrigated with irrigation sprinklers (water sprinklers or simply sprinklers). You can also use them to prevent dust from circulating in the air and keep things cool.

Facilitates time conservation, allowing more time to be spent on other activities. – As a means to avoid the inconvenience of manually watering a lawn, automated sprinkler systems are gaining in popularity. This will save you time; for instance, if you use a sprinkler with a hose attachment, you or someone else will need to be home for approximately one hour to turn off the water and prevent the lawn from becoming too wet.

Your entire landscape will receive the necessary care because a home irrigation system conserves water. Only certain lawn areas may receive sufficient water if you have a sprinkler hose attachment.

An automated home sprinkler system saves money and time while increasing the home’s value. To maintain a healthy lawn and increase your home’s resale value, water your plants and grass only when necessary.

How to Calculate How Many Sprinklers to Buy for your Home?

To avoid wasting money and possibly killing your lawn, you must determine the number of sprinklers required to water it adequately. By measuring the area, it is possible to determine the number of sprinklers required to maintain a lush and healthy lawn. 

Also, it would help if you used a measuring tape to determine the perimeter of your yard. Then record it on graph paper using simple conversions, such as 1 square = 1 square foot of yard. 

If your lawn is significantly larger than 5 or 10 square feet, you can use 1 square to represent 5 or 10 square feet when planning the placement of your spring plantings. 

Examine the sprinkler head’s label to determine its range. If you purchase sprinklers with a 15-foot radius, you can place them 15 feet apart on graph paper without having to perform additional calculations. 

The distance between sprinklers with a 12-foot radius should be 12 feet. Add the number of sprinklers on your graph and spend the resulting sum.

Tips When choosing a Sprinkler System for your Home

Water is arguably the most critical factor in maintaining a healthy lawn and garden, and installing a lawn sprinkler system is frequently the most effective way to deliver it. Your plants will turn brown and perish if they don’t receive water during droughts and the hottest days of summer.

A sprinkler system makes sense if you want to avoid having plants die and having periods when your yard does not look perfect. Hand-watering is time-consuming, inefficient, and unlikely to occur at optimal times for your plants.

A sprinkler system improves the health and appearance of your garden and lawn. You may even find that installing a lawn sprinkler system saves you money in the long run due to less water loss. A sprinkler system permits you to water your lawn more efficiently for two primary reasons:

The first thing in the morning is water. 

You are probably not awake and prepared to water your plants at the ideal time. Early watering reduces evaporation waste and allows plants to absorb water without leaf damage from drops evaporating rapidly in the heat.

Only water your plants when they need it. A sound sprinkler system will detect rain and only water the lawn when it is dry.

The use of water is more efficient. A sprinkler system conserves water by delivering water only where it needs it and not where it is not.

A lawn sprinkler system may save money in the long run, but there is an initial investment to consider. Determine if it is a worthwhile investment for your budget by soliciting bids.

Avoid handypersons who claim they can install a sprinkler system but have no experience with installation or maintenance. An improperly installed system will cost you more in maintenance and leaks than one installed correctly from the start. Frequently, a lawn sprinkler system is the most effective way to water your lawn and garden. Your plants will perish without regular watering during dry spells and the hottest days of summer.

Pros & Cons of a Sprinkler

Capable of adapting to a broad range of agricultural situations and cropsThe water supply is in great demand.
It is compatible with fertilizers and other chemical substances.Costly and time-consuming  
Delivers a Deluge of Water Precisely When you require itPlants suffer damage.  
Sprinkler irrigation systems are highly effective at dispersing a large quantity of water precisely where and when you need it.The increased humidity and wetness left on the leaf mass after sprinkler irrigation can promote foliar diseases such as blight.

Things to consider before determining sprinkler heads requirement?

Due to the ubiquity of sprinkler irrigation system components, farmers can construct their system with a few standard tools and some know-how.

We Have Abundant Water

Sprinkler irrigation systems can collect water from subsurface aquifers, ponds, rivers, and irrigation channels. Although municipal wastewater is subject to severe health and safety requirements, it is a possible source for sprinkler irrigation systems.

System of Water Distribution

An automatic pump works with the water delivery system of a sprinkler irrigation system to generate the high-pressure volume required by most spray irrigation systems.

Frequently, electric or gas motors power pumping systems. Connecting the water supply to the field requires various extra components, with pipes or hoses being the most important. PVC and metal pipe are viable options for delivering water to agricultural areas, as are hoses ranging from garden hoses to vast industrial hose networks.

You can use Nozzles for Radial Spray.

Sprinkler heads are among the most noticeable components of a sprinkler irrigation system. There are numerous sprinkler heads, with some providing greater control over the water’s volume, spray pattern, and flow rate than others.

Sprinkler Head Types – Low or High-Pressure

If the water pressure of the irrigation system is insufficient, irrigation efficiency will decline. It is possible that not all sprinkler heads will emerge from the earth when activated. The absence of water transfer between spray heads or rotors results in an uneven spray pattern. If you observe brown spots in your landscape that are not receiving enough water, you can leave the sprinklers on longer.

When the water pressure is excessive, new issues arise. The first cause for concern is the possibility of system harm. The components will crack like a balloon if you apply excessive air pressure to an irrigation system. This is likely to occur whenever a PVC fitting is used to connect two pipe sections. 

The second issue associated with high pressure is a more prevalent one: decreased irrigation efficiency. When the pressure at the spray nozzle is too high, a fine mist is produced instead of substantial water droplets. The thin mist is carried away by the wind but dissipates before reaching the landscape.

Common Issues with Zoning Sprinkler Heads

Sprinkler Head Misalignment Most sprinkler system problems may be traced back to spray heads that are too low or too high, preventing water from spraying uniformly throughout the lawn. If you have a sprinkler system and are experiencing problems, you should examine this first. The correct positioning of the head is a simple solution.

If you use a sprinkler with an unusually tall head, you risk causing extensive damage to your lawn. If the sprinkler head is too low, puddles will accumulate in its vicinity. This could lead to irrigation issues, burst pipes, and other dangers, necessitating the services of an emergency plumber.

Reduced Water Pressure

When the pressure on a lawn sprinkler decreases, a trickle of water is produced rather than the typical jet of water. This is most likely the result of a leak in your system. So, you must open the backflow prevention device valves and the main sprinkler valve (which supplies water to the system). If it does not function, it is time to contact sprinkler repair experts.

The Sprinkler System’s Water Waste

Sprinkler systems have a vast water usage problem. This is a clue that there is a problem with your irrigation system, which can completely ruin your lawn. Typically, sprinklers that use a lot of water are much older models. Therefore, it may be time to upgrade to a more efficient model.

No water is present in this sprinkler zone.

A few dead spots around areas of puddled water are likely the reason for your sprinkler system’s malfunction. This common issue with sprinkler systems results in water spraying unevenly because the system is skipping zones. This is typical for systems fed by pumps.

Numerous reasons, including rodents, insects, and other critters that gnaw on pipes, can lead to water loss.

The sprinkler has been blocked.

Typically, blocked sprinkler results from dirt and debris caught in the sprinkler head. When sprinkler heads are obstructed, water is sprayed inconsistently, and the sprinklers may not even rise. Even after adjusting the sprinkler head height, some homeowners say that water continues to pool around the sprinkler system, causing the sprinkler heads to clog.

It is possible to repair a clogged sprinkler head by digging it up, wiping it with a damp cloth, and replacing it. If this does not resolve the issue, you can use a small knife or wire to remove any debris lodged in the stopper.

Frequently Asked Questions

What is the Ideal Number of Sprinkler Heads in a Zone?

This depends heavily on the total flow rate and pressure at the source. For instance, a 34-inch faucet provides a flow rate of 10 gallons per minute. Two sprinklers, each with a flow rate of 5 GPM, can be driven by a faucet with a flow rate of 10 GPM.

What is the 18-inch rule for sprinkler heads?

The “18-inch rule” is a precaution designed to ensure that no objects, including those being stored, impede the sprinkler head’s ability to spray water in the event of a fire. The objective is to prevent 18-inch-or-higher obstructions from preventing sprinkler heads from reaching a fire.

What is the minimum distance between sprinkler heads?

NFPA 25, the Standard for the Inspection, Testing, and Maintenance of Water-Based Fire Protection Systems, specifies that anything in the path of a sprinkler’s spray must be at least 18 inches from the deflector.

How far can a sprinkler head be off a wall?

Typically, spray sprinklers can be mounted up to 2.3 meters (7.4 feet) from any wall. Moreover, the average height is 6 feet tall. The suggested distance for open ceilings ranges from 1 to 12 inches. Sprinklers concealed, recessed, or flush may be installed closer to the ceiling than 1″ if the sprinkler manufacturer and local building codes permit.

Can I add another sprinkler head to the existing zone?

Yes, you can add another sprinkler head to the existing zone. Expanding a current sprinkler system is a straightforward process. However, it needs a basic familiarity with cutting and gluing PVC pipes and being physically able to do a lot of trenching.

How many impact sprinklers can you have on one line?

The resulting number will be equal to how many zones you will need. If, for example, each sprinkler head needs a flow rate of 1.31 GPM and 20 of them, you will need 26.2 GPM. If your system can hold 16.67, you will need to use two zones to cover that specific area of your lawn. 

How many zones can a sprinkler valve control?

The slower application rates mean that your sprinkler zones can be significantly larger. For example, a medium-sized yard might need eight zones with an above-ground system, whereas the subsurface irrigation system might only need 3 to 4 zones. Fewer zones mean fewer control valves, fewer heads, and a less expensive timer.


So it is clear from the discussion given above that installing an irrigation system with sprinkler head zones is necessary. It depends on several factors. It depends mainly on PSI, the pressure pound per square inch, and gallons per minute. The sprinkler heads try to use more GPM at higher pressure.

It is a fast and easy process for irrigation systems to know the number of sprinklers in one zone. We hope you learn well from the article about how many sprinkler heads per site and find it helpful and informative. Enjoy your plantation hobby and maintain your lawn.

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