
Micro sprinkler irrigation systems are a great way to water your home garden efficiently. They use a network of tiny tubes and sprinklers to deliver water directly to the roots of plants, reducing evaporation and runoff.
These systems can be installed in as little as a few hours, and are relatively inexpensive. In fact, a single micro sprinkler can cover an area of up to 20 square feet, making them a cost-effective option for small to medium-sized gardens.
One of the biggest benefits of micro sprinkler irrigation systems is their water-saving capabilities. They can reduce water usage by up to 50% compared to traditional sprinkler systems, which is especially important for areas with water restrictions.
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Choosing and Setting Up
Choosing the right micro-sprinkler is crucial for a successful irrigation system. Make sure the flow rate of the sprinkler matches the soil's infiltration capacity, especially for heavier soil, where lower flow rates are recommended.
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Insects can stop your micro-sprinkler from rotating properly, so look for one with a pop-up rotor that protects it from insect penetration. Pressure-compensated micro-sprinklers are highly recommended for uniform water and nutrient application, especially for high-value crops.
When planning your system, create a compass drawing of your system plan by drawing quarter circles for 90° sprays, half-circles for 180°, three-quarter circles for 270°, and full circles for 360°.
Introduction
Micro-sprinkler irrigation has become a widely used practice in Colorado orchards due to its potential to increase yields and reduce labor requirements.
This method applies water directly to the soil surface, allowing it to dissipate under low pressure and infiltrate orchard soils uniformly.
Water use on orchards with micro-sprinklers is typically 30% less than gated pipe/furrow irrigation.
In 'water-short' years, this increased irrigation efficiency can make a significant difference between small or medium sized fruit and a good or full sized fruit and crop.

Micro-sprinkler irrigation systems operate under low pressure, typically 20 to 35 psi.
The wetting patterns of 10 to 30 feet and a variety of discharge flows of 8 to 90 gph allow for more precise watering to match soil infiltration rates.
By timing irrigations to only irrigate to the maximum depth of the tree root zone, you can also increase fertilizer efficiency by reducing or eliminating nutrient leaching below the tree root zone.
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Picking the Right: Key Considerations
Make sure the flow rate of the sprinkler matches the soil's infiltration capacity. For heavier soil, it's best to stick with lower flow rates.
Check the manufacturer's inspection and compare sizes to match the wetted perimeter to the root zone size. This will ensure your micro-sprinkler is working efficiently.
Insects entering the nozzle can stop your micro-sprinkler from rotating properly, so look for one with a pop-up rotor that protects it from insect penetration.
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Using a pressure-compensated micro-sprinkler is highly recommended for high-value crops, as it ensures all your trees are irrigated and fed equally, even on extreme slopes.
A standard flow rate micro-sprinkler emits a fixed output, perfect for watering flat gardens or plants with similar consumption requirements.
Adjustable flow rate micro-sprinklers can be adjusted from 0 to full L/h output, giving you full control and flexibility of water flow to best suit your plant's needs.
Before buying parts, know the flow and pressure of the water in the area to establish the number of sprinklers you can operate at the same time.
The effectiveness of the entire system depends on determining your irrigation areas and then choosing the micro-sprinkler and drippers accordingly.
Determining the soil and water quality is crucial to know if you need a fertilizer injector in your micro-sprinkler irrigation system.
Multiple filters can be installed throughout an irrigation system for complete versatility.
Changed Your Mind or Garden Layout?

Changing your mind or garden layout is a breeze with micro sprinklers. They can be easily adapted and moved to a new location if you decide to rearrange your potted plants or garden design.
To move a micro sprinkler, simply remove it from the pipe and use a Goof Plug to plug the existing hole. Then, use a Hole Punch to create a new hole in the pipe where you want to place the micro sprinkler.
If you're making a lot of changes, it's a good idea to save your original pipe as much as possible to minimize waste.
Consider reading: Garden Irrigation Pipe
Design and Installation
Determining irrigation areas is crucial for a micro-sprinkler irrigation system's effectiveness. This involves choosing the right micro-sprinklers and drippers for each area, with each area having its own pipe with similar components.
Calculating water flow and pressure is essential before buying parts, as it determines how many sprinklers can be operated at the same time. The number of drippers should not exceed the maximum water flow capacity of the irrigation zone.
Determining soil and water quality is also vital, as high salt levels or pH levels can impair plant growth. Injecting acid into the irrigation water with a fertilizer injector can help neutralize these issues.
Multiple filters can be installed throughout the irrigation system for optimal performance.
Designing for Irrigation
Designing for Irrigation is a crucial step in creating an effective micro-sprinkler irrigation system. Determining the irrigation areas is the first step, as each area will have its own pipe with similar drippers or sprinklers.
The effectiveness of the system depends on accurately determining these areas. Calculating water flow and pressure is also essential to establish the number of sprinklers that can operate at the same time.
You should know the flow and pressure of the water in the area before buying parts. This will help you determine the number of drippers that won't exceed the maximum water flow capacity of the irrigation zone.
Determining the soil and water quality is also vital, as high salt levels or pH can impair the ability of plants to absorb key micronutrients. Neutralizing high pH levels with a fertilizer injector can help mitigate this issue.
To ensure the system is set up correctly, it's essential to get good-quality parts with a proven track record. Ask your irrigation company about the parts they're providing and read the reviews.
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Plan your garden layout, indicating your water source and labeling planting areas or individual plants you want to water. Mark where you'd like to place your micro-sprinklers, taking into account the spray pattern.
Using a compass drawing, create quarter circles for 90° sprays, half-circles for 180°, three-quarter circles for 270°, and full circles for 360°. Pencil in the throw radius in meters, depending on your flow rate, and use a combination of angled sprinklers to create a customized garden watering system.
Buy more connectors, micro-sprinkler heads, ground stakes, adapters, pre-assembled micro tubing, and risers than you think you'll need, as you may need to replace them over time. Measure the size of the area you want to water and the distance between each watering area, and add this to your plan to determine the length to cut the LDPE pipe.
Spray Patterns
Spray patterns play a crucial role in efficient watering.
90º sprinklers are perfect for watering garden corners and paths, producing an accurate 90° angled output that avoids overspray and minimizes water wastage.
For areas along garden beds or walled/fenced spaces, 180º sprinklers create a semi/half circle spray pattern, ensuring water is only emitted around the perimeter where it's needed.
If you have hard to reach areas or irregular shapes, 270º sprinklers are the way to go, producing a unique spray pattern that helps avoid missed spots.
For large garden beds or lawn areas, rotating 360º sprinklers are ideal, providing full circle watering from the centre.
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Equipment and Assembly
The Push Fit Micro Sprinkler System is simple to use, with each component featuring a push fit connector that joins together easily, creating a water tight seal.
You can install a length of Pre-Assembled Sprinkler Micro Tubing into the winged shaped colour coded rotor of your chosen Push Fit Micro Sprinkler Head.
Sprinkler Micro Tubing is available in different lengths up to 100cm, giving you ultimate flexibility when choosing where to install a sprinkler head.
The blunt end of the Sprinkler Spike can be installed into the built-in channel on the side of the rotor, while the pointed end can be installed into the ground for a reliable and stable hold.
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Sprinkler spikes are available in 40cm and 50cm heights, making it easy to raise the height of sprinkler heads so watering can take place either above or below the foliage canopy.
To connect the assembled sprinkler to the main LDPE supply pipe, first pierce a 4mm hole in the pipe using a Hole Punch.
You can then use a Push Fit to Barbed Adaptor to create a connection, with the push-fit side of the adaptor installed into the end of the Micro-Tubing and the barbed end installed into the hole created in the main supply pipe.
Hose pipes are more flexible than LDPE pipes, making them perfect for bending around corners without the need for connectors.
To attach a garden hose to the system, simply thread a quick-click Tap Connector to the outlet of the Pressure Reducer and attach the hose using a Hose End Connector.
You can install an Irrigation Filter just before connecting the garden hose to the system by installing a Male Adaptor into the hose end connector and using a Snap-on Filter with a barbed end.
LDPE pipe can be supplied directly from the tap using a Barbed Tap Connector, which can be threaded directly onto the tap, timer, pressure reducer or filter.
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To make working with LDPE pipe easier, it's a good idea to weigh it down using a brick at both ends, unwind it carefully, and let it settle on the grass for an hour.
This allows the pipe to become more flexible and easier to work with.
Pre-assembled Micro Sprinklers arrive complete and ready to use, with a sprinkler head, ground stake, built-in hole punch, micro-pipe, and 4mm barbed fitting.
The stake features a spiked end that can be used to pierce a hole into the LDPE pipe, eliminating the need for extra tools.
To install a Pre-assembled Micro Sprinkler, simply push the barbed joiner into the wall of the pipe and push the stake into the ground where required.
You can install a Threaded Micro Sprinkler head into the top of the ground stake or riser, giving you complete flexibility when choosing where to place a Micro Sprinkler.
Rigid risers can be installed into micro pipe up to 4m away from the main supply and easily connected using a 4mm Barbed Joiner.
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Features
Micro sprinkler irrigation systems are a great way to water your garden or crops, and they have several features that make them stand out.
They are suitable for seasonal and high-value crops, and can increase yields while decreasing water, fertilizer, and labor use if managed properly. This low-pressure system uses medium to low irrigation volumes, making it highly efficient at applying and uniformly distributing water with little to no wastage.
Micro sprinklers are ideal for irrigating irregularly shaped or sloping fields that can't be furrowed or flood irrigated. Many irrigation companies in Toronto add fertilizer injection to the system for an additional increase in its efficiency.
There are different types of micro sprinklers available, including standard flow rate and adjustable flow rate models. Standard flow rate micro sprinklers emit a fixed output from the outlet, perfect for watering flat gardens or plants with similar consumption requirements.
Adjustable flow rate micro sprinklers can be adjusted from 0 to full L/h output, allowing you full control and flexibility of water flow to best suit your plant's needs. This feature is especially useful for plants with different watering requirements.
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Micro sprinkler systems can be programmed automatically using a Tap/Water Timer, which means you don't have to spend time watering your garden - you don't even need to remember to turn on the tap!
Setting timers to water early morning or late evening can help avoid any water wastage from evaporation during the mid-day sun. Micro sprinklers work best at water pressures around 1.5 - 3 bar, and using a Pressure Reducer at the start of your system can help regulate the pressure to the correct level.
Here are some key features of micro sprinklers:
- Standard Flow Rate: Micro sprinklers with a consistent flow rate emit a fixed output from the outlet.
- Adjustable Flow Rate: Can be adjusted from 0 to full L/h output allowing you full control and flexibility of water flow.
- Pressure Compensating: Ensure a consistent flow rate regardless of pressure or elevation in the system.
Advantages and Considerations
Micro-sprinkler irrigation makes irrigation management easier by getting a larger volume of soil wet compared to drip irrigation.
Chances of evaporation loss and runoff from the soil surface and during water application are higher with micro-sprinkler irrigation.
Regular inspection of the system is crucial to prevent emitter blockages and ensure proper water distribution.
Checking moisture levels at different depths in the field is essential to determine if the area is getting too much or too little water.
Make sure the flow rate of the sprinkler matches the soil's infiltration capacity to avoid overwatering or underwatering your plants.
For heavier soil, it's best to stick with lower flow rates to bring out the hydraulic and ergonomic benefits of longer irrigation and fewer shifts.
Using a micro-sprinkler with a two-stage swivel can help you adjust to the growing needs of your plants as their root zone expands.
A micro-sprinkler with a pop-up rotor can protect it from insect penetration and ensure proper rotation.
Pressure-compensated micro-sprinklers are highly recommended for high-value crops to ensure uniform water and nutrient application.
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Troubleshooting and Maintenance
If you notice a Micro Sprinkler that's not emitting any water, it may mean the internal mechanisms require cleaning or you need to flush the system.
To keep your Micro Sprinkler system running at its peak, you'll need to carry out some occasional basic maintenance.
First, ensure the filter remains clean and the internal mesh screen is intact. To do this, unscrew the filter cover to reveal the internal mechanism and clean out any debris using a bucket of clean water.
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Regularly flushing the system is crucial to keep it working efficiently. Remove the End Stops/Plugs and turn on the tap to flush out debris circulating around your Micro Spray system.
Repeating this process twice a month keeps your system working at its peak and prolongs the life of your emitters.
Remember to replace the end plugs after each flush to prevent any damage to your system.
To test the connection is water tight, turn the system on at the tap after re-connecting a pipe with a Barbed Joiner/Nut lock Joiner.
A clean internal mesh screen is essential to prevent clogging and maintain water flow.
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