Senninger Irrigation


Senninger's Micro-Sprinklers make installation easier and offer better options for efficient irrigation in nurseries, greenhouses and under-tree installationsSenninger is pleased to announce the release of the new upright and inverted Micro-Sprinklers, designed to make installation easier and offer better options for efficient irrigation in nurseries, greenhouses and under-tree installations. They are available with 5 different flow options to meet various crop needs. Senninger’s micro-sprinklers provide exceptional uniformity and distribution at low pressures.

The upright model is ideal for irrigating nurseries, orchards, vineyards, vegetables and citrus crops. The inverted model is ideal for overhead irrigation in greenhouses, shade houses and hoop houses.

The bridgeless design of Senninger’s micro-sprinklers eliminates dry spots caused by leg shadows. The deflector is designed for maximized startability and smooth operation. With three different base connections, the product’s design makes installation and retrofitting easier. It also allows for convenient disassembly for nozzle cleaning.

Senninger’s Micro-Sprinklers are constructed out of engineering-grade UV-resistant thermoplastic, which translates to reliability and durability. They come with two-year warranty on materials, workmanship and performance.

It’s all about the soil

The i-Wob, a leading sprinkler due to to its loa application intensity, unmatched uniformity, and large area of coverage at low pressures The outstanding distribution uniformity of wobbler technology is one the reasons that the i-Wob is the most imitated sprinkler of the irrigation industry. The off-center rotary action of a grooved deflector combines with the wobbling action to create consistently-sized droplets. Unlike stream-driven sprinklers, the i-Wob instantaneously covers a 360° area.

Droplet Size
The i-Wob is available with 4 different deflectors to select the droplet size that better matches the soil’s characteristics to get better infiltration and maintain good soil structure. Ideally, droplets should be large enough to combat the effects of strong winds, but not so large as to disrupt the soil.

Application Intensity
While larger droplets resist wind-drift and evaporation loss, their higher kinetic energy can lead to surface sealing and erosion on tighter soils. Smaller droplets are suitable for tighter soils while looser soils benefit from larger droplets.
Because the i-Wob applies water instantaneously over a larger area, it distributes droplets with a lower application intensity. This helps preserve the soil structure and infiltration capabilities.

Application Rate
While the application rate can be adjusted to the specific crop and growth stage, considering only crop needs could result in lesser yields. The application rate of a sprinkler must match the infiltration rate of the soil to prevent runoff, and over- or under-watered areas within the field.
In addition, double goosenecks and truss rod hose slings are perfect for dividing the flow from each outlet in half for two sprinklers in either side of the mainline. This spreads the flow over an even larger application area which helps increase soak time.

i-Wob’s four deflector models

i-Wob_grey i-Wob_black i-Wob_blue i-Wob_white
SA6: Standard-Angle
small droplets
SA9: Standard-Angle
medium droplets
LA9: Low-Angle
medium droplets
LA6: Low-Angle
large droplets


Senninger has led the way in the development of many solutions for the agricultural irrigation industryFor 54 years, Senninger has led the way in the development of many solutions for the agricultural irrigation industry, helping growers meet the food and fiber needs of a growing population worldwide.  It all began when Joe Senninger created the industry’s first Insect-Proof™ Impact Sprinkler to solve a common problem for growers in Central Florida. Soon after, Joe’s nephews, Andy and Mark Healy, joined the company bringing their marketing and engineering backgrounds.

Since those early days, Senninger pioneered products and concepts that became industry standards. In 1966, Senninger introduced the irrigation industry’s first in-line pressure regulator. This innovation launched a valuable line of products that have met different installation and customer needs, and have helped irrigators save water and energy. In its continual pursuit of irrigation innovations, Senninger also introduced:

  • Color-coded nozzles, backed by a five-year warranty against orifice wear (1970)
  • First plastic sprinkler heads on center pivots (1971)
  • Six degree “Wind Fighter” center pivot sprinkler (1974)
  • The Wobbler (1978), which provides the most uniform water application pattern
  • The Super Spray (1981). The industry’s most versatile spray nozzle. Its interchangeable parts and customizable pattern and droplet size helped make it one of the world’s most popular spray nozzles
  • The Drag Hose Adapter (1982) in response to low water availability in West Texas with the first drag hose adapter for spray nozzles
  • A four-mode LEPA (Low Energy Precision Application) Quad Spray in 1986. LEPA technology has now evolved into one of the most water and energy-efficient irrigation methods ‒ Close Spacing
  • The “T-Spray” (1994)
  • The integral weight (1999)
  • Plastic Gooseneck and Truss Rod Hose Slings (2002)
  • Pivot Boom System (2006)UP3 Easy Clean Nozzle (2008)

Senninger celebrates its 54th anniversary loyal to its values and cultureWhile Senninger is recognized for their innovations and contributions to the irrigation industry, their employees know that the company success is built upon core values kept throughout the years. Honesty, Trust, Loyalty, Respect, and Teamwork, and the dedication of team members, are the real foundation of Senninger’s achievements. March 24, Senninger celebrates its 54th anniversary loyal to those values and culture, to continue to produce innovative products and develop more efficient irrigation practices.



Senninger interactive pivot products catalog Senninger is proud to announce the launch of the new interactive pivot products catalog for PC and mobile devices. This newest version has information on product features, benefits, and installations, with the aid of application photos and videos.
The Senninger interactive pivot products catalog expands on current Senninger literature (brochures and catalogs) to help dealers show growers which Senninger irrigation product is better for their fields, and what solutions they can implement to address various irrigation issues.
It also gives the convenient option to select the measurement system (U.S or Metric) for flows, nozzle sizes, pressures and other useful data.
The desktop and mobile versions of Senninger new interactive pivot products catalog, and the Catalog User Guide, can be downloaded from Senninger website. Once downloaded, this self-contained and easy-to-navigate resource does not require internet connection for ready access anywhere ‒ in the office, the field, or at home. Click here to access our Software and Tools webpage and download the new interactive pivot catalog.

John Johnston is Senninger's new District Sales Manager for the Pacific NorthwestSenninger is proud to announce that John Johnston has joined our domestic sales team as the new District Manager for the Pacific Northwest. He will interact with existing Senninger’s customers and develop new ones in Washington, Oregon, Northern California, and British Columbia.

John is from Nampa, Idaho, where he resides with his wife Melissa.  All customers in the Pacific Northwest can reach him via email to or his cell phone (208) 230-9919.

John comes to Senninger with over 25 years of sales, installation and system design experience in mechanical move, solid-set and the res-com irrigation markets across the western US.

Senninger held an Irrigation Systems Design with Irri-Maker Software courseIn partnership with the Center for Research and Rural Extension (CIER) at the National University of Colombia, Senninger held an Irrigation Systems Design with Irri-Maker Software course.

Irri-Maker optimizes irrigation system design by combining survey, Digital Terrain Modeling (DTM) and Computer Aided Design (CAD), with many hydraulic analysis functions. It handles the various design processes with ease by creating a seamless flow of data between survey topography, computer aided design functions, irrigation design elements, as well as input and output to Google Maps.

Juan Carlos Mora, Senninger’s Regional Manager for South America, lead this theoretical and practical course, which addressed concepts of precision irrigation, spray and drip applications. “Irri-Maker helps optimize energy and economic resources. This course is a good opportunity for agricultural engineers and civil engineers to improve their capabilities in these areas” said Juan Mora.

“The course Design of Irrigation Systems with Irri-Maker fully met my expectations,” said Sergio Santa Romero, agricultural engineer.  “I found a lot of potentialities that Irri-Maker brings for irrigation projects.  The truth is that I am very satisfied with the course, and I hope it will improve my design skills.”

Water-efficient sprinklers such as Wobblers, are designed for low pressures to save water and energy

Water-efficient sprinklers such as Wobblers, are designed for low pressures to save water and energy

Irrigation efficiency is defined by a system’s ability to deliver the required amount of water to crops at the right time and place.  Regardless of the method that growers have employed―whether aged flood irrigation, overhead application or drip―they know that an efficient irrigation system greatly depends on the equipment and tools used, and on the strategies set in place to get the most out of it.

Leading manufacturers in the irrigation industry have developed a number of products to meet the need for more efficient agricultural practices and address the challenge of diminishing natural resources.  In other words, more food and fiber needs to be produced for a growing population, while water availability remains a major concern in many regions.

Center pivot and sprinkler manufacturers have also adopted new technologies to provide growers with more precise watering systems. Among the advances that have contributed to irrigation development over the past decades, it is worth mentioning Wobbler technology for overhead sprinklers.  This technology utilizes grooved deflectors to divide a flow into numerous streams of water but keeps them in a constant wobbling motion to further divide each stream into consistently sized droplets. This consistent droplet size is what helps maintain a sprinkler’s pattern integrity against wind-drift and evaporation.

The release of Wobbler technology launched a new generation of sprinklers noted for their low application intensity, great distribution uniformity, and large area of coverage at low pressures.  In nearly one hundred countries with diverse agricultural systems and geographical characteristics, Wobbler technology has proved its suitability when it comes to more efficient irrigation practices.  Introduced by Senninger in 1978, there are now other manufacturers employing this concept as well.

The capability to use different grooved deflectors is one of the multiple advantages of this technology. It allows growers to customize their sprinkler’s droplet size and trajectory in order to best suit installation, crop and soil requirements.  Typically, tighter soils require smaller droplets and looser soils can accept larger droplets.

Unlike stream-driven applicators, sprinklers based on the Wobbler concept offer the opportunity to deliver small, medium or larger droplets instantaneously over their entire wetted area.  Impact sprinklers deliver water in a more concentrated ring than can negatively impact the soil surface.  They also produce many small droplets prone to wind-drift and evaporative loss, which lowers irrigation efficiency, and wastes water and energy. For their part, Wobbler sprinklers provide an even droplet size large enough to resist strong wind conditions, but not so large as to disrupt the soil.

Water-efficient sprinklers such as Wobblers, are now designed for low pressure operation (10 psi), allowing irrigators to achieve optimum performance, and lower total pumping costs by reducing horsepower requirements and energy consumption.  Correct system pressure is key to assuring proper flow through emitters and optimum distribution uniformity.  This helps prevent health issues and irregular growth.

Slight pressure fluctuations can produce dramatic flow changes.  At low operating pressures of 7.98 to 29.9 psi, flow variations could easily exceed 10% with small changes in the system’s pressure. This is true for both overhead sprinkler installations as well as drip installations that run at very low pressures of about 7.98 to 10 psi. A slight pressure variation on these low pressure systems can have a significant impact on application rates.

System pressures may vary due to elevation changes in a field, pressure loss through pipe fittings, or changes in the system’s water supply.  On pivot irrigation systems they can also be altered by end guns cycling on and off.  Pressure regulators will help control these fluctuations and assure sprinklers distribution uniformity by limiting excess inlet pressure to a constant outlet pressure.

The new Xcel-Wobbler UP3 TOP can be installed along the entire length of the center pivot

The new Xcel-Wobbler UP3 TOP can be installed along the entire length of the center pivot

Top of Pipe

With new taller corn varieties, there is a renewed interest in top-of-pipe sprinklers on center pivots. Wobbler technology has also proved beneficial for this installation. The newest sprinkler of the Wobbler family, the Xcel-Wobbler UP3 TOP, provides excellent distribution uniformity over a large area, making it ideal for high profile crops.

It is also suitable for varying terrains and for different types of soils due to its gentle rain-like application. Its instantaneous application over a large area reduces the impact of the sprinkler pattern, helping preserve the soil structure and its infiltration capabilities. This also helps prevent run-off and wheel tracking.

Close to the Ground

Many irrigators prefer their heads mounted on drops.  Low Energy Precision Application (LEPA) and Low Energy Spray Application (LESA) are two methods regaining popularity in North America.  Because they operate at lower pressures and deliver water closer to the ground, these methods combat wind-drift, save water, and even increase yields.  Both technologies have also helped farmers reduce fuel consumption, and lower operating costs.  LEPA has been used primarily for row crop irrigation with application efficiencies typically exceeding 95%.

Close Spacing is helping American growers save water and increase yields

Close Spacing is helping American growers save water and increase yields

Today, LEPA has evolved into close spacing installations where the sprinkler heads are placed just 30 inches apart, on every row, to wet the entire soil surface. In traditional LEPA systems, applicators are mounted far apart so they can irrigate every other furrow.

Close spacing combines the use of bubbler sprinklers with conservation tillage. Crop residues hold the water in place, allowing it to soak in and fill the soil profile. In some cases, bubbler applicators deposit water directly into furrows, creating a narrow, aerated stream of bubbling water that resists high temperatures and strong winds. In other cases, they deflect water down in a wide, dome-shaped pattern that gently delivers the water without spraying, which is ideal for germination, low crop watering and sensitive soils that are prone to compaction.

With close spacing irrigation, American growers have seen approximately a 25% increase in water savings while also enjoying increased yields.  These benefits have created renewed interest in this type of irrigation practice, especially in areas where aquifer levels are declining or water is beginning to be regulated, or simply as a means to increase yields.

Growers are combining various components of this practice differently and achieving great success. They alter the spacing on the first few spans, combine spray application with bubble applications at various crop stages, vary the sprinkler height off the ground, and even alter the application rate by irrigation cycle.

For other irrigators, there is another powerful solution for issues they may face with run-off and surface sealing―which are often associated with clay soils with low infiltration rates.  Double goosenecks in combination with truss rod hose slings, allow the installation of two separate drops along a pivot span.  Dividing the flow from a single outlet and delivering it on opposite sides of the mainline result in an increased wetted area using the same amount of water.  This irrigation application can more closely match the soil’s intake rate for a better absorption of the water.  Combining double goosenecks with the wide pattern of Wobblers, further broadens the area of distribution which not only helps preserve the soil’s health, but also saves energy costs.

Fontela, J.M. (2016, September/October). Efficient Irrigation from Top to Crop. Irrigazette International, 156, 4-9.


Pressure Regulator Ultra, , Senninger's new ultra high flow pressure regulator

Pressure Regulator Ultra

Senninger is pleased to announce the new Pressure Regulator Ultra (PRU), a high-flow 2-inch pressure regulator.  The PRU is designed to maintain a preset outlet pressure with flows of 20 to 100 gpm (4542 to 22713 L/hr). The inlet/outlet is offered in either a 2-inch FNPT or 2-inch FBSPT configuration depending on the desired application.  The compact size (9 x 4.5 inches or 22.9 x 11.4 cm) of the PRU makes it an excellent choice for installations with limited space, higher flows and the need for accurate zone control.

The PRU is suitable for a wide range of applications including agricultural, residential/commercial, and industrial projects. The design incorporates a large flow path that reduces hysteresis, friction loss, and resists plugging.  The unit is manufactured with corrosion resistant materials that can withstand harsh water conditions and chemicals.  It carries a two-year manufacturer’s warranty on materials, workmanship, and performance.

Senninger introduced the first in-line pressure regulator of the irrigation industry in 1966. Throughout the years, Senninger has continued to develop other models to meet a variety of installation and customer needs. Today, Senninger is acknowledged for its leadership in promoting the importance of maintaining correct system pressure to conserve water and energy.


Close Spacing with LDN Shroud is helping save water and increase alfalfa yields in Nevada

Close Spacing with LDN Shroud is helping save water and increase alfalfa yields in Nevada

In the mid 80’s Senninger worked with researchers at the Texas A&M AgriLife Research & Extension Center to release the first Low Energy Precision Application (LEPA) sprinkler.  This technology was developed for center pivot irrigators in the western high plains of the United States who were affected by high energy costs and declining water availability due to dropping water tables or dwindling surface supplies.

LEPA systems use low-pressure bubbler heads to deposit water directly into furrows just 8 to 18 inches above the ground. With the heads closer to the ground, the water avoids the hitting leaves, so it does not come in contact with plants and fruit susceptible to water borne diseases and nearly all of it is absorbed by the soil. In fact, researchers and growers have found that with these low pressure heads, at least 20 percent more water reaches the soil compared with conventional spray nozzles.

What began 30 years ago as LEPA has evolved into one of the most effective irrigation methods known today for center pivot systems ‒ close spacing. Close spacing has been a proven success in many dry regions across the US.  It is an irrigation method based off LEPA that is gaining ground in areas where water is regulated and people are increasingly concerned about diminishing natural resources. The reason why close spacing irrigation is gaining popularity among growers in America is simple ‒ growers are saving water, saving energy, and seeing increased yields.

Furthermore, this high-performance technology works at low pressures, which makes it ideal for reducing energy and pumping costs, as well.

A Closer Look
Close spacing combines the use of the same water-efficient LEPA bubbler heads with conservation tillage. Just as in those LEPA applications, close spacing heads are mounted 8 to 18 inches above the soil to combat wind-drift and prevent evaporation losses.  Both methods require nearly identical management practices and provide similar benefits.

Close spacing started to take shape among North Texas growers who experimented with combining LEPA technology with conservation tillage, and began placing bubbler heads on every row.  In traditional LEPA systems, sprinklers are placed 60 inches apart to irrigate every other furrow.  The close spacing method, with 30 inches between heads, distributes water over most of the soil surface.  The crop residues left over from previous growing seasons helps prevent evaporation loss and run-off and holds the water until the soil is ready to soak it in.  As a result, close spacing technology achieves application efficiencies typically exceeding 95 percent.

Making It Work
Success with close spacing depends on three key factors: the right irrigation equipment, the right farming practices and the right field conditions.

Senninger bubblers made for LEPA have proven to be the ideal sprinklers for getting the most out of close spacing irrigation.  They operate at low pressures ranging from 6 to 20 PSI, using less energy than conventional low-pressure sprinklers, and operate using fewer gallons per minute than conventional spray nozzles ‒ approximately 0.27 to 21.18 gpm.

There are two types of bubbler sprinklers currently available.  One creates a narrow, aerated stream of bubbling water that resists high temperatures and strong winds. This sprinkler deposits water directly into furrows, which avoids wetting the foliage.  The other deflects water down in a wide, dome-shaped pattern that gently delivers the water without spraying, which is ideal for germination, low crop watering and sensitive soils that are prone to compaction.  Due to its less concentrated distribution pattern, it can be used on fields without furrows and on some rolling terrains.

Because close spacing sprinklers are mounted 8 to 18 inches above the ground, this method works better on relatively flat farms. The maximum recommended slope for fields considering close spacing is one percent. Circle planting allows bubblers to be centered in furrows, which is ideal for further controlling run-off.  It is used by growers who also want to prevent wetting the crop canopy when taking advantage of close spacing applications.

The versatility of bubbler sprinklers provides the opportunity to combine various components to suit different crop and soil needs.  Some growers, for example, combine conventional spray heads with bubble applications at various crop stages. Others alter the spacing on the first few spans, vary the sprinkler height off the ground, and even alter the application rate by irrigation cycle.



xcel_wobbler_solidsetLow-pressure irrigation systems like those from Senninger have provided significant savings in energy and water costs. These systems use low-pressure sprinklers designed to operate between 10 psi and 25 psi (0.7 bar and 1.7 bar).  They reduce pumping demands without significantly reducing flow, so crops continue to receive a healthy amount of water.

Senninger low-pressure sprinklers further reduce energy usage by irrigating more zones at the same time.  Another advantage is that low-pressure sprinklers irrigate with larger droplets, which are more resistant to wind and evaporation.

Senninger’s Wobblers apply water instantaneously in a large 360° wetted pattern, which translates into lower application intensity. This helps maintain the soil’s infiltration capabilities and prevents surface compaction and run-off.  With Senninger’s Wobblers, farmers can expect to see an energy saving of up to 50%.

Low-pressure sprinklers save water and money

Irrigation is one of the main consumers of energy on a farm. Most irrigation systems still use high-pressure impact sprinklers that release an enormous volume of water using pressures between 40 psi and 75 psi (2.7 bar and 5.2 bar). Modifying irrigation practices and adopting new low-energy technology is becoming ever more important to ensure profits.

Before reducing pressures and pump sizes, be sure that the new sprinklers are specifically designed for low-pressure operations. The criteria for low pressure may vary from one manufacturer to another, but most agree that anything over 30 psi is a mid-range to high-range sprinkler.

“Install low-pressure sprinklers, and slash costs.” Farmer’s Weekly. [South Africa] May 13. 2016. Print.



Senninger Irrigation

Senninger Irrigation
A Hunter Industries Company
16220 East Highway 50
Clermont, FL 34711

Office: (407) 877-5655

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