The Hunter MP-Rotator sprinklers are my top recommendation for the realization of a garden irrigation. They contain a number of useful functions that will help beginners in particular to get everything right. And which make planning much easier for both beginners and professionals.

• Matched Precipitation Rate (MPR): The Hunter MP Rotator automatically ensures that every patch of lawn receives the same amount of water in the same amount of time. To do this, it automatically adjusts the amount of water when a larger or smaller radius or a smaller or larger section of a circle is watered, so that the precipitation rate always remains constant at around 0.4 inches per hour. This also works automatically across different MP rotator models; you can mix models in one sector without any problems. As a result, users no longer need to think about coordinating the amount of precipitation, which is otherwise a very complex matter. The matched precipitation rate ensures that no spot is unnecessarily watered too much and thus also saves a lot of water.
• Automatic pressure regulation: By combining it with the appropriate pressure-regulated body (Pro Spray PRS40), the pressure on the sprinkler is automatically reduced to a maximum of 40 psi. Operation at 40 psi is the variant recommended by Hunter, in which the sprinklers have the ideal spray pattern. If the water flow test results in a lower pressure value for operating the sprinkler, the Pro Spray PRS30 body can alternatively be used, which reduces the pressure on the sprinkler to a maximum of 30 psi. This saves you from having to think about how the sprinklers in the pipeline are ideally placed in order to achieve the most even pressure distribution possible. and you can also be sure that the sprinklers are working with 40 or 30 psi pressure (provided there is sufficient outlet pressure).
• Slow watering: A low rainfall rate of 0.4 inches / hour ensures that the lawn is watered slowly. This may sound like a disadvantage to laymen, but it is an immense advantage! Due to the low precipitation rate, the MP-Rotator has a low water consumption compared to other sprinklers. This means that more sprinklers can be operated in one sector with the amount of water available. So you need fewer sectors and simply let the sprinklers run longer. If you have little water volume and water pressure available from the outset, then the MP rotator can be the way out to be able to irrigate at all. In addition, the low precipitation rate saves water because the lawn can also absorb all of the water with this slow irrigation. Hunter puts this saving at 30% compared to traditional spray nozzles.

There are also the following advantages, which are also known from other Hunter and Rainbird products:

• Manual throwing distance reduction: The throwing distance can be continuously reduced by up to 25% on all MP Rotator models.
• Precise adjustment: The throwing range and pitch circle can be precisely adjusted continuously
  

  The setting of the circular sector and throwing distance is particularly easy with the MP rotator setting tool

• Separation of body and nozzle: This means that unsuitable nozzles can be replaced with just one movement and, in borderline cases, you can find the ideally fitting nozzle very easily and flexibly by trial and error. If a sprinkler is defective, it does not have to be completely dug up, but the nozzle is simply replaced.
• Color coding: Allows quick and easy differentiation of the nozzles

The MP Rotator sprinklers are currently the only sprinklers on the market that have all of the advantages listed. They differ fundamentally from other sprinklers in some points and, as rotating nozzle sprinklers (also known as multi-jet rotary sprinklers), form a separate product group. Unlike nozzle sprinklers, they do not give off the water in a surge, but instead break it up into many fine water jets by rotating the nozzle. The MP rotators are also very different from other Hunter sprinklers. That’s because they weren’t originally developed by Hunter, but by the Walla Walla Sprinkler Company. This pursued a completely different technical philosophy than the competition and created a revolutionary product. In 2007 this was added to the Hunter product range through a takeover of the company. It is ideal for small to medium-sized gardens.

The MP rotator is offered in the following models:

• MP1000 (throwing distance 8.2 to 14.8 feet)
• MP2000 (throwing distance 13.1 to 21.0 feet)
• MP3000 (throwing distance 22.0 to 29.8 feet)
• MP3500 (throwing distance 30.8 to 35.1 feet)

There is also the 800 series, which, at 0.8 inches / hour, has a different precipitation rate than the models described above and is therefore not suitable for combination with these. The 800 series is designed for very small areas.

• MP800 (throwing distance 5.9 to 11.5 feet)
• MP815 (throwing distance 8.2 to 16.0 feet)

There are also 3 models with which you can specifically water a narrow strip of lawn:

• MPLCS515 (is placed in the left corner of the strip)
• MPRCS515 (is placed in the right corner of the strip)
• MPSS530 (is placed in the middle)

The special case of a narrow lawn strip is watered with 3 special strip sprinklers

And last but not least, a model that is especially suitable for irrigating a small corner:

• MPCORNER

For the implementation of your irrigation, I recommend using the models MP1000, MP2000 and MP3000!

These three models cover a throw range from around 10 feet to 33 feet (at 40 psi pressure). This is completely sufficient for small and medium-sized gardens and normally gives you plenty of variation options. Since all manufacturers are optimistic about throwing distances, it is best to subtract 10% from the manufacturer’s values ​​when planning your planning!

Although the sprinklers have the same precipitation rates of around 0.4 inches per hour, you should, as far as possible, use the same model with the same throwing range in a sector in whole or in large part. In this way, you can correctly water your lawn according to the principle of the square formation or, alternatively, the triangle formation. For example, you plan to water the lawn according to the square formation with the largest model MP3000 and use the smaller models MP2000 or MP1000 in the edge areas that remain and where there would be unnecessarily large overlaps when using MP3000 models.

With the MP3500, you can alternatively use a sprinkler with a throwing distance of even 35.1 feet, which also has the same precipitation rate. However, it is currently only offered in a single model variant (90 to 210 degrees), so I would not consider this sprinkler in the basic planning and only use it in the worst-case scenario – if, for example, two ore three excess feet are still missing in an edge area.

In my opinion, only for large gardens it is worthwile – due to the higher possible throw distances – to consider using traditional geared sprinklers instead of MP rotators. For gardens of up to 11.000 sqare feet I would definitely use the MP rotator because of the many advantages.

The MP rotators cannot – as is usual with geared sprinklers – be set for any sector of a circle. Instead, depending on the desired application, one of 3 model variants can be selected for both the MP1000, MP2000 and MP3000. Using the MP3000 as an example:

• MP3000-90 (circular sector adjustable from 90 to 210 degrees)
• MP3000-210 (circular sector adjustable from 210 to 270 degrees)
• MP3000-360 (fixed 360 degree circle sector)

The model variant -360 is used when you want to irrigate a full circle with the sprinkler. This can only be used for exactly this purpose! So you can not only rain 270 degrees with it and leave the remaining 90 degrees unwatered. Instead, the -210 model variant is intended for irrigation of a three-quarter circle. In any case, this must have a circular sector of at least 210 degrees and can irrigate a maximum of a circular sector of 270 degrees (= three quarters of a circle). The last of the three models -90 can be used for watering a quarter circle (90 degrees) as well as for watering a semicircle (180 degrees). It has to rain at least a sector of a circle of 90 degrees and goes up to a sector of a circle of 210 degrees, i.e. slightly larger than a semicircle.

With the MP-Rotator, the sprinkler and body are separate! Only the sprinkler itself is sold as an MP rotator. In order to be able to use it, a suitable body is required, i.e. the suitable “housing” to which the pipeline is connected and from which the sprinkler can rise. The MP-Rotator Sprinkler is simply screwed into the body and can be changed in a few seconds. In order to take full advantage of the sprinkler, you should use a pressure-regulating body. 2 models are offered:

• Pro spray PRS30 (30 psi)
• Pro Spray PRS40 (40 psi, optimal spray pattern)

The PRS30 automatically regulates the pressure arriving at the sprinkler to a maximum of 30 psi, the PRS40 to 40 psi.

The automatic pressure regulation ensures that all sprinklers work with the same water pressure and thus ensures even watering

Both bodies are offered in 4 riser versions, using the PRS30 as an example:

PROS-00-PRS30 (standpipe sprinkler for shrubs)
PROS-04-PRS30 (pop-up height 4 inches)
PROS-06-PRS30 (pop-up height 6 inches)
PROS-12-PRS30 (pop-up height 12 inches)
The number in the model number stands for the pop-up height, i.e. the height that the sprinkler moves out of the ground when irrigation starts, in inches. Normally you will choose the 6 inches or 4 inches variant, the 12 inches variant may be used if there is an obstacle in front of the sprinkler. The standpipe sprinkler will not be used in the usual private garden, it does not sink and therefore stands in the way after the work is done (tripping hazard).

Below is an excerpt from the range of MP-Rotator sprinklers and associated PRS30 or PRS40 bodies on Amazon: