Understanding MP Rotator Nozzles by Hunter Industries
MP Rotator nozzles use multiple rotating streams of water to deliver unmatched uniformity and water savings compared to traditional spray nozzles. Available in a variety of arc and radius options, MP Rotators provide matched precipitation across all configurations, making them a go-to choice for efficient irrigation.
How MP Rotators Work
- Multi-trajectory rotating streams for even coverage and wind resistance
- Low precipitation rate (~0.4"/hr for Standard, ~0.8"/hr for MP800 series)
- Double-pop nozzle action keeps debris out
- Vandal-resistant arc adjustments
- Built-in filter screen to reduce clogging
When and Where to Use MP Rotators
- Standard MP Rotator Family (0.4"/hr): Best for most landscapes with clay or compact soils, sloped areas, or when water windows are limited.
- MP800 Series (0.8"/hr): Ideal for tight soil conditions or areas requiring quicker water delivery.
- Great for retrofit applications where conventional sprays are wasting water or performing poorly.
- Excellent solution for poorly designed systems with too many heads in a zone. Rather than splitting the zone and running new wire and pipe, upgrading to MP Rotators is a more affordable and effective fix.
- The lower application rate allows water to soak into the soil more naturally, reducing runoff and improving plant and turf health.
Choosing the Right MP Rotator
Use this quick comparison to match existing nozzle coverage distances with a suitable MP Rotator model:
| Existing Nozzle Distance | Suggested MP Rotator Model | Radius Range | Arc Options |
|---|---|---|---|
| 8'–10' | MP800SR | 6'–12' | 90°–360° |
| 12'–15' | MP1000 | 8'–15' | 90°–360° |
| 15'–20' | MP2000 | 13'–21' | 90°–360° |
| 20'–25' | MP3000 | 22'–30' | 90°–210°, 360° |
| 30'–35' | MP3500 | 31'–35' | 90°–210° |
Helpful Tips
- Always match MP Rotator heads within the same zone
- Use 30–40 PSI regulated bodies (PRS30/PRS40 recommended)
- Flush lines before installation to avoid clogging
- Perfect for both residential and commercial landscapes
- When upgrading from traditional spray nozzles, increase zone runtime to 15–22 minutes (from the typical 7–15 minutes) to allow proper watering at the lower precipitation rate
Frequently Asked Questions: MP Rotator Nozzles
What is an MP Rotator nozzle?
An MP Rotator is a multi-stream, multi-trajectory rotating sprinkler nozzle designed for water efficiency and superior uniformity compared to traditional spray heads.
What makes MP Rotators more efficient?
They apply water slowly and evenly at matched precipitation rates, reducing runoff and allowing more water to soak in, especially in clay soils or on slopes.
Can I retrofit existing spray heads with MP Rotators?
Yes, MP Rotators are designed to fit standard spray bodies, making them ideal for retrofitting underperforming zones without replacing the entire system.
What pressure do MP Rotators require?
Optimal performance occurs at 40 PSI. Pressure-regulated spray bodies (like PRS30 or PRS40) are recommended for best results.
Do I need to adjust my run times when switching to MP Rotators?
Yes. Because MP Rotators apply water more slowly, run times should be increased to 15–22 minutes compared to 7–15 minutes for spray nozzles.
Can MP Rotators be used with pump or lake water systems?
Yes, but it's highly recommended to install a filter at the point of connection or valve to protect the nozzles from debris.
What sizes and arcs are available?
MP Rotators come in several models ranging from 6′ to 35′ with arc settings from 90° to 360°, covering most landscape needs.
Can I mix MP Rotator models in the same zone?
No. For proper distribution uniformity, use the same MP model series within a zone. For example, don’t mix MP1000 with MP3000 in the same zone.
How do I know if my sprinkler system has enough pressure for MP Rotators?
Check the system's static and dynamic pressure with a gauge. MP Rotators perform best at 40 PSI, so you may need to install pressure-regulating bodies or use a flow/pressure chart to verify your system's capabilities.
How many MP Rotators can I put on one zone?
Refer to a flow chart to understand how much volume and pressure you have available. Each nozzle uses a specific GPM, and your system’s available flow will determine the total count per zone.
Can I use these with dirty water?
Yes. MP Rotators are designed with built-in screens and a double-pop nozzle to help prevent clogging, but a proper filtration system is still recommended for long-term performance.