Black Hunter SRM gear-drive sprinkler with riser extended
Black Hunter SRM gear-drive sprinkler with riser extended
Sprinklers watering a lawn beside a stepping-stone path
Sprinklers watering a lawn beside a stepping-stone path
Hunter SRM sprinkler body with riser retracted
Hunter SRM sprinkler body with riser retracted
Rack of green Hunter SRM replacement nozzles
Rack of green Hunter SRM replacement nozzles
Top view of Hunter SRM sprinkler adjustment controls
Top view of Hunter SRM sprinkler adjustment controls
Black Hunter SRM gear-drive sprinkler with riser extended
Sprinklers watering a lawn beside a stepping-stone path
Hunter SRM sprinkler body with riser retracted
Rack of green Hunter SRM replacement nozzles
Top view of Hunter SRM sprinkler adjustment controls

Hunter SRM Gear Drive Sprinklers for lawn reticulation. This compact, economical gear drive has interchangeable nozzles for different watering distances and an adjustable part-circle or full-circle pattern.

The Hunter gear drive adjustment tool is required for arc adjustment and is also used for nozzle installation and radius adjustment.

✓ Inlet: 15mm (1/2") BSP female
✓ Coverage: 4.3–10.7 metre radius across nozzle options
✓ Spray Pattern: 40°–360°
✓ Recommended Pressure: 170–380 kPa
✓ Flow: 1.4–16.7 L/min across nozzle and pressure options
✓ Pop-Up Height: 100mm

Service parts include the replacement riser seal and spring seat. Check the seal’s model-identification information before ordering.

Hunter SRM Gear Drive Sprinkler Specifications

Black Hunter SRM gear-drive sprinkler with riser extended

Hunter SRM Gear Drive Sprinklers for lawn reticulation.

This compact, economical gear drive waters smaller turf areas with a rotating stream. Interchangeable nozzles suit different watering distances.

The supplied nozzle options cover a 4.3–10.7 metre radius across the recommended operating pressure range of 170–380 kPa. Radius is the distance from the sprinkler to the outer edge of the watering pattern.

The arc adjusts from 40° to 360° for part-circle or full-circle watering. The top adjustment screw lets you shorten the watering distance. Choose the nozzle for both watering distance and arc so sprinklers on the same zone apply water at similar rates.

The Hunter gear drive adjustment tool is required for arc adjustment and is also used for nozzle installation and radius adjustment.

The plastic body has a 100mm pop-up height and a 15mm (1/2") BSP female inlet. Its overall height when retracted is 180mm. The removable filter screen can be cleaned if debris builds up.

Eight standard nozzle choices are supplied, with the 2.0 nozzle factory fitted. The nozzle trajectory is approximately 14°.

Warranty: One year.

Service parts include the replacement riser seal and spring seat. Check the seal’s model-identification information before ordering.

Hunter SRM Gear Drive Sprinkler Specifications

✓ Product Type and Application
Hunter SRM Gear Drive Sprinklers.

✓ Dimensions and Connection
Inlet: 15mm (1/2") BSP female.
Pop-up height: 100mm.
Overall body height when retracted: 180mm.
Riser: plastic.

✓ Coverage and Spray Pattern
Radius: 4.3–10.7 metres across nozzle and pressure options. Radius is the distance from the sprinkler to the outer edge of the watering pattern.
Spray arc: 40°–360°.

✓ Pressure & Flow
Recommended pressure: 170–380 kPa.
Operating pressure: 140–700 kPa.
Flow: 1.4–16.7 L/min across the nozzle range.
See ‘Precipitation Rate’ below for how the arc setting affects the amount of water applied across the area.

✓ Nozzles and Performance
Eight standard nozzle choices are supplied. The 2.0 nozzle is factory fitted.
Nozzle trajectory: Approximately 14°.

Performance example at 300 kPa, before radius reduction:
0.50 nozzle: 4.6 metre radius; 2 L/min.
0.75 nozzle: 5.2 metre radius; 3 L/min.
1.0 nozzle: 5.8 metre radius; 3.8 L/min.
1.5 nozzle: 6.7 metre radius; 6 L/min.
2.0 (factory fitted) nozzle: 7.6 metre radius; 8 L/min.
2.5 nozzle: 8.5 metre radius; 9.8 L/min.
3.0 nozzle: 9.4 metre radius; 12 L/min.
4.0 nozzle: 10.4 metre radius; 15.7 L/min.

✓ Adjustment
The top adjustment screw lets you shorten the watering distance. Choose the nozzle to suit the required flow and coverage; the family’s full radius range includes different nozzle options.

✓ Sprinkler Spacing
Spacing is the distance between neighbouring sprinklers.
For head-to-head coverage, each sprinkler throws water far enough to reach the next sprinkler. This overlap helps water the area between them evenly.
For example, a 7.6 metre watering radius suits sprinklers spaced 7.6 metres apart for head-to-head coverage. Use the actual watering distance after adjustment when planning the spacing.
A square layout places sprinklers on a square grid. A triangular layout uses staggered rows.

✓ Precipitation Rate
Precipitation rate describes how quickly water is applied across the area, measured in millimetres per hour.
For example, with the 2.0 nozzle at 300 kPa, a 180° half-circle arc and sprinklers spaced 7.6 metres apart:
Square layout: 17 mm/hour.
Triangular layout: 19 mm/hour.
At the same pressure, the same nozzle uses essentially the same flow whatever the arc setting. A smaller arc concentrates that water over a smaller area.
Different nozzle sizes can help balance watering between smaller and larger arcs, but they also change the watering distance. Choose nozzles that maintain head-to-head coverage; changing nozzle size alone may not suit an existing layout.
Where suitable nozzle combinations cannot provide similar watering rates, put sprinklers with different watering rates on separate zones so their run times can be set independently.

✓ Operation and Servicing
A removable filter screen allows cleaning when debris collects in the sprinkler.

✓ Warranty
One year.

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