MP Rotator gauge - pressure measurement at the housing when MP Rotator is not rotating

Hunter MP Rotator not rotating - device for testing the operating pressure directly on the sprinkler.

If the pressure and water volume are correct, then the nozzle Hunter MP Rotator will work reliably and robustly for many years. Even dirt, lime or ferrous water are usually not a problem. From the experience of our projects, we see that in gardens with very ferruginous well water MP Rotator nozzles have worked completely without problems (without cleaning/rinsing them even once) for more than 5 years.

To find the disturbance factor that prevents the MP Rotator from working optimally, proceed systematically:

1. check if the operating pressure of the irrigation system is too low. In order for the rotator nozzle to rotate, there must be sufficient water pressure during operation. First of all, you can determine this with the help of a manometer at the water tap (e.g. measuring device from DVS Beregnung ZS-F01). When irrigation is running, the measured value must be at least 3.5 bar. If the value of the entire system falls below 3.5 bar during operation, this is an indication that too many consumers have been connected to an irrigation circuit, causing the system pressure to fall below the ideal operating pressure. 2.

If the pressure at the irrigation system inlet is correct and the "non-rotating MP Rotator" problem persists, you can measure the operating pressure directly below the MP Rotator using the MP Adapter and a pressure gauge. In order for the MP Rotator to reach its spraying distances and for the turbines to receive sufficient water volume for the rotating movement, a value of 2.8 bar should ideally be measured during operation. If the pressure is too low here, then this can be an indication of the malfunction.

Possible sources of error are:

-a pipe in the main line or at the sprinkler connection is kinked

-the pressure reducer in the riser of the pop-up sprinkler is dirty or defective

-there are too many consumers connected or the pipe friction is too strong

3. if the pressure measured with the MP adapter is sufficient (2.8 bar), but the MP Rotator still does not rotate, check whether the filter at the base of the MP Rotator is clogged. To clean it, simply remove it and clean it with a brush under running water. Also look into the MP Rotator from below and clean this area with a strong water jet. Then reassemble the rotator and put it back in place. 4.

If the rotator head still does not rotate, the nozzle of the MP rotator may be contaminated or blocked. Turn the sector adjustment ring completely open and closed several times during operation. This loosens any possible contamination. Then set the sector to maximum and open and close the throw distance adjustment several times during operation. Repeat this several times to remove any contamination. 5.

If the head of your MP Rotator still does not rotate, it may be due to the friction brake in the cone of the rotator. This ensures that the cone rotates slowly and evenly. Press the spray head of the MP Rotator down several times during operation and rotate the spray head back and forth several times during operation of the rotator, about 10-15 turns in each direction.

Now your MP-Rotator should be fully functional again.

If a nozzle does not rotate or does not reach the promised throw distance despite suitable pressure and sufficient water quantity as well as after the above steps, then it is probably defective. We check this at DVS Beregnung on our measuring stand at optimal pressure conditions of 2.8 bar. You can also test this with a spray housing that you connect directly to the water supply.

We give an extended manufacturer's warranty of 3 years on MP Rotator because we are convinced of the quality and functionality of the nozzle! The warranty return on Hunter MP Rotators is well below 0.01%. This means less than 1 in 10,000 nozzles sold show a defect.