A Unique Package of Irrigation Products Designed To Cool and Clean Synthetic Turf Sports Fields
Application Synthetic Sports Turf Fields
Radius 32.5 to 50.3 m
Rotors ST1600B & ST1600BR
Flow 21.8 to 74.2 m³/hr
Flow 364 to 1,237 l/min
Inlet Size 50 mm BSP
Product Line
Discontinued Models


User installed options

Contact your local distributor for product availability and ordering.


Operating Specifications

  • Radius: 32.5 to 50.3 m
  • Flow rate: 21.8 to 74.2 m3/hr; 364 to 1,237 l/min
  • Operating pressure range: 4.0 to 8.0 bars; 400 to 800 kPa
  • Precipitation rate: 60 mm/hr approx.


Simple to specify, contractor-friendly to install, and easy to service and maintain for the end-user, the Hunter ST System is the first and only cost-effective, fully integrated solution designed to exceed the unique and specific needs of the synthetic turf irrigation market.

The Hunter ST System features gear-driven long-range rotors based on Hunter's legendary rotor technology coupled with a special multi-axis swing joint, low-pressure loss valves and a robust feature-packed vault. Combined, they provide the ultimate in installation flexibility and long-term total access to all irrigation components, including the swing joint point of connection. Such complete access is an absolute must when the surrounding synthetic surface is not easily excavated and restored to original condition without huge expense and specialized equipment and procedures.

Key Benefits

Nozzle choices: 6
Standard nozzle: #20
Nozzle range: #16 to #26
Nozzle trajectory: 22.5 degrees
Gear-drive: Isolated, grease lubricated
Factory installed rubber logo cap (ST-1600B)
Arc Adjustment: Movable stops left & right
Arc setting: 40° to non-reversing 360°
Ratcheting nozzle turret
Telescoping rubber infill barrier on riser
Adjustable speed of rotation: 0 to 80 seconds (180° @ 8 bar)
5-year component part warranty
Internal construction: Brass, stainless steel & ball-bearings

Advanced Features

The ST-1600 compliments the ST-90 and STG-900 ST Rotors by adding long-range capabilities. These enhanced radius rotors are perfect for football fields, where smaller radius rotors might fall a little short. They are even better for extra-wide field applications like football and field hockey. ST-1600 rotors are available in two configurations:


This model is a 13 cm pop-up with adjustable-arc and full-circle capabilities in one rotor. All internal components of this rotor are accessible from the top without disturbing the synthetic surface. It is ideally suited for installation within Hunter's ST-243642B vault, or in the natural turf that is sometimes adjacent to the synthetic field to be irrigated.


This model is a compact and unobtrusive riser-mounted rotor with adjustable-arc and full-circle capabilities. This model is perfect for those installations where it is preferable to keep all irrigation piping and equipment away from the synthetic surface. The riser-mounted configuration also allows existing synthetic sports fields to be retrofitted for irrigation without disturbing the playing surface. Riser-mounted configurations are typically installed at elevations that promote safety and protection from the rotor's high-flow water stream.

ST Rotor for Sports Field

Traditional swing joints will cause the rotor to move back and forth as the elevation of the rotor is raised and lowered. While appropriate for natural turf installations, synthetic turf systems require a completely different approach. The best way to support the rotor's tremendous lateral thrust during operation is to place the rotor in a snug fitting hole within the vault's cover set. In order to set the rotor perfectly to grade and in this very specific location the swing joint must provide flexible movement in every direction, not only up and down, but also forward, backward, left and right. Ideally, this flexibility would include the ability to "reset" the elevation grade of the rotor should the vault settle downward during the vibratory compaction of the surrounding field base material. Enter the Hunter Vertical Alignment (VA) swing joint. Offering the ultimate in flexibility, our vertical alignment swing joint includes six pivot points for multi-axis movement plus a seventh pivot at the outlet for rotational adjustments of the valve and rotor assembly. Constructed of rugged 80 mm (3") PVC pipe and fittings, this 21.7 bar; 2,172 kPa rated swing joint dramatically reduces dangerous water velocities and performance robbing pressure loss through the ST System's components.

ST System Accessories

The Hunter ST vault's complimentary blend of features include construction grade fiberglass in the body, high impact polymer-concrete on the exposed upper rim and a near indestructible polymer-concrete cover set. Together, they form a 20,000+ lb. rated enclosure that is durable, yet easy to install at 170 lbs. with the covers removed.

The exclusive 3” thick four-piece polymer-concrete cover set has a perfectly located cast-in hole for the ST-1600B rotor on one side. This design allows the rotor to be held perfectly to grade within the hole while the enclosure is back-filled from the exposed opposite side. Quick couplers are a must-have around every synthetic field. The cast-in quick coupler port and cover on the opposite side eliminates the need for separate quick coupler enclosures around the playing field. A cast-in port & cover for the ST Valve’s on-off-auto selector adds even more flexibility.

All ST Vaults include convenient quick access ports. Quick-couplers provide a convenient source of water for washing down spills and water-soluable paint. Integrated in-vault design eliminates the need for additional quick-coupler enclosures.

The ST-V30K valve kit includes a remotely located On-Off-Auto selector and solenoid manifold assembly. These convenient features bring valve manual control functions and solenoid splice connections closer to the surface for easy access.

Clear Advantage of the Hunter ST Vault

Have you ever tried to bore a hole into polymer-concrete? It is near impossible. How about installing and setting a 500 lb. polymer-concrete enclosure? Not very much fun.

We designed the ST vault to be as lightweight and easy to install as possible without sacrificing durability. From the functionality perspective, the four-piece cover, large interior space and total top access to all components make servicing easier and the system less expensive to maintain.

ST System

For some, the preferred approach to designing synthetic turf irrigation systems is the "block" type configuration with remotely located valves that are off the synthetic surface. The benefit of this configuration is that it removes all high-pressure mainlines from beneath the synthetic surface. Through the use of a remotely located isolation valve, constantly pressurized supply lines to the quick couplers can be removed from beneath the synthetic surface as well.

For others, the preferred approach is to use valve-in-head (VIH) rotors. However, typical VIH rotors have an unacceptably high-pressure loss at the high flows and pressures that are inherent in all synthetic turf irrigation systems. As a result, the Hunter ST System utilizes a valve adjacent to head (VAH) configuration. This design lowers the pressure loss down to a very acceptable 0.15 bar; 15 kPa  loss at 65.0 m3/hr; 1,082 l/min through the valve assembly (see slideshow at top of page). The ST-V30K includes a remotely located On-Off-Auto selector and solenoid manifold assembly.  This convenient  features brings valve manual control functions and solenoid splice connections closer to the surface for easy access. (not shown)

Sports Turf System


ST-1600 Nozzle Performance Data
Nozzle Pressure Radius Flow Precip mm/hr
  bar kPa m m³/hr l/min
16 4.0 400 32.5 21.8 364 41.4 47.8
5.0 500 35.0 24.4 406 39.8 45.9
6.0 600 37.0 26.8 446 39.1 45.1
7.0 700 39.0 28.9 482 38.0 43.9
8.0 800 41.0 31.2 520 37.1 42.9
18 4.0 400 34.0 24.3 405 42.0 48.6
5.0 500 37.0 27.1 452 39.6 45.8
6.0 600 39.0 29.8 496 39.1 45.2
7.0 700 40.5 32.1 535 39.1 45.2
8.0 800 43.0 34.8 580 37.6 43.5
20 4.0 400 35.0 32.7 545 53.4 61.7
5.0 500 39.0 36.5 609 48.1 55.5
6.0 600 43.0 40.1 668 43.4 50.1
7.0 700 44.0 43.3 721 44.7 51.6
8.0 800 45.0 46.4 773 45.8 52.9
22 4.0 400 36.0 38.9 649 60.1 69.4
5.0 500 39.5 43.6 726 55.8 64.5
6.0 600 44.0 47.7 795 49.3 56.9
7.0 700 47.0 51.5 859 46.7 53.9
8.0 800 48.0 55.2 920 47.9 55.3
24 4.0 400 37.0 45.9 765 67.1 77.4
5.0 500 40.5 51.3 855 62.6 72.2
6.0 600 45.0 56.2 937 55.5 64.1
7.0 700 47.5 60.7 1012 53.8 62.2
8.0 800 48.7 65.0 1084 54.9 63.3
26 4.0 400 38.4 53.0 883 71.8 82.9
5.0 500 41.4 59.2 986 68.8 79.5
6.0 600 46.0 64.6 1077 61.0 70.4
7.0 700 48.7 69.7 1162 58.6 67.7
8.0 800 50.3 74.2 1237 58.7 67.8

Note: All precipitation rates calculated for 180 degree operation. For precipitation rate of 360 degree sprinkler divide by 2.



4-Piece Cover Set 61 x 91 x 7.6 cm
Exposed Rim 67 x 97 cm
Overall Height 107 cm
Base Pad 112 x 127 cm
  * Not for use with
ST-1600BR Rotor



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CAD Installation Details

cad - stk.5v.02 DWG DXF PDF