I-20

A High Performance Rotor with the Diversity and Efficiency for Any Site

With 22 nozzle choices, a 17’ to 46’ radius, and 6 body choices, the I-20 is an indispensable rotor. Whether you’ve got a small area, sandy soil, or a mix of shrubs and grass, the I-20 is ready to water with efficiency and reliability. Recent improvements include automatic arc return; non-reversing 360, from 50 to 360 degrees; and a non-strippable, vandal-proof drive mechanism that prevents gear stripping and saves repair costs. Adding FloStop® control, easy through-the-top arc adjustment, and a standard drain-check valve all equate to a rotor that stands second-to-none in its class.

Product Tabs

Features

Models: Shrub, 4", 6", 12"
Models stainless riser: 4", 6"
Arc setting: 50 to 360 degrees
Factory installed rubber cover
Through-the-top arc adjustment
Quick check arc mechanism
Water lubricated gear-drive
Warranty period: 5 years
Nozzle choices: 22
Nozzle racks: 1.5 to 8.0 blue, 2.0 LA to 4.5 LA gray, 0.50 to 3.0 black, 6.0 to 13.0 green

Automatic Arc Return [1]

This feature returns to the original arc regardless of where the turret is turned. This ensures vandal protection in any environment.

Non-Strippable Drive [2]

The patented, non-strippable, vandal proof drive mechanism enables the turret to be turned without causing damage.

Part- and Full-Circle in One Model [3]

Patented non-reversing 360 for part- and full-circle in one model, from 50 to 360 degrees.

Headed and Slotted Set Screw [4]

Use a slotted screwdriver or the Hunter wrench for easier and simpler adjustments as needed.

FloStop® Control [5]

FloStop closes the flow of water from individual sprinkler heads while the system is running. This is ideal for changing nozzles or turning off specific heads during maintenance and construction.

Optional Reclaimed Water ID [6]

Purple caps indicate where non-potable irrigation water is being used.

Stainless Steel Riser [7]

For unforgiving soil conditions, unpredictable climates, or heavy foot traffic, stainless steel is the best choice

Drain Check Valve (up to 10 ft. of elevation) [8]

The drain check valve keeps lines from draining when the system is shut off. This saves water, reduces liability, and increases system life.

Models

I-20 Models Chart

	I-20-00	I-20-04	I-20-06	I-20-12
Overall Height	7-3/4"	7-1/8"	9-7/8"	17"
Pop-up Height	N/A	4"	6"	12"
Exposed Diameter	1-3/4"	1-3/4"	1-3/4”	1-3/4"
Inlet Size	3/4" Female NPT	3/4" Female NPT	3/4" Female NPT	3/4" Female NPT

OPTION

FACTORY-INSTALLED
Nozzles: 1.5 to 4.0 Reclaimed water ID cover

SPECIFICATION BUILDER (PLASTIC)

MODELS	STANDARD FEATURES	FEATURE OPTIONS	NOZZLE OPTIONS
I-20-00 = Shrub	Adjustable arc, plastic riser, check valve, 8 standard nozzles, and 4 low-angle nozzles	NCV = Witout check valve (only available on 4" model) R = Reclaimed water ID	1.5 to 4.0 = Factory installed nozzle number
I-20-04 = 4" Pop-up
I-20-06 = 6" Pop-up
I-20-12 = 12" Pop-up

SPECIFICATION BUILDER (STAINLESS STEEL)

MODELS	STANDARD FEATURES	FEATURE OPTIONS	NOZZLE OPTIONS
I-20-04-SS = 4" Pop-up	Adjustable arc, stainless steel, check valve, 8 standard nozzles, and 4 low-angle nozzles	NCV = Witout check valve (only available on 4" model) R = Reclaimed water ID	#4 to #28 = Factory installed nozzle number
I-20-06-SS = 6" Pop-up

MODELS

STANDARD FEATURES

FEATURE OPTIONS

NOZZLE OPTIONS

I-20-04-SS = 4" Pop-up

Adjustable arc, stainless steel, check valve, 8 standard nozzles, and 4 low-angle nozzles

NCV = Witout check valve
(only available on 4" model)

R = Reclaimed water ID

#4 to #28 = Factory installed nozzle number

I-20-06-SS = 6" Pop-up

EXAMPLES

I-20-04	4" pop-up, adjustable arc
I-20-12 - R - 4.0	12" pop-up, adjustable arc, check valve, with reclaimed water ID, and 4.0 nozzle
I-20-06-SS - R - 3.0	6" pop-up, adjustable arc, stainless steel, reclaimed water ID, and 3.0 nozzle

1/2" and 3/4" Inlet Rotor Comparison Chart

View 1" and 1.5" Inlet Rotors >> [9]

A Standard that Has Yet to be Matched Hunter made its reputation on the quality, reliability and innovative features found in its rotary sprinkler line and continues to set the benchmark by which other manufacturer’s rotors are judged.	[10]	[11]	[12]	[13]	[14]
	SRM [10]	PGJ [11]	PGP-ADJ [12]	PGP Ultra^® [13]	I-20 [14]
QUICK SPECS
Radius	15' - 30'	15' - 37'	22' - 52'	17' - 46'	17' - 46'
Flow Rate (GPM)	0.42 - 3.4	0.64 - 5.3	0.5 - 14.1	0.36 - 14.8	0.36 - 14.8
Inlet Size	1/2"	1/2"	3/4"	3/4"	3/4"
FEATURES
Nozzle Options	6	8	27	22	22
Precipitation Rate (in/hr)	0.45	0.6	0.4	0.4	0.4
Recommended Pressure Range (PSI)	30 - 50	30 - 50	25 - 70	25 - 70	25 - 70
Operating Pressure Range (PSI)	20 - 100	20 - 100	20 - 100	20 - 100	20 - 100
Check Valves	Available	Factory Option	Available	Factory Option	Pre-Installed
Specialty Nozzles	N/A	N/A	N/A	Factory Option	Pre-Installed
Check Height (ft.)	7'	7'	4'	10'	10'
Factory-Installed Check Valve		Optional		Optional	10'
Warranty	1 Year	2 Years	2 Years	5 Years	5 Years
ADVANCED FEATURES
Low Angle Nozzle Choices
Automatic Arc Return
Non-Strippable Drive
Part and Full Circle in One Model
Headed & Slotted Set Screw
Reclaimed Water ID
Available Short Radius Nozzles
Available Factory Installed Check Valve with up to 10' Elevation Change
FloStop Control
Stainless Steel Riser Option
Applications
Residential
Commercial/Municipalities
Athletic Fields
High Vandalism Areas
Low Pressure Areas
Riser-Mounted Sprinklers
Ground Cover and/or Shrubs
Reclaimed Water

Specifications

Operating Specifications

Radius: 17' to 46'
Flow Rate: 0.36 to 14.8 GPM
Recommended pressure range: 25 to 70 PSI
Operating pressure range: 20 to 100 PSI
Precipitation rates: 0.4 in/hr approx.
Nozzle trajectory: Std = 25 degrees, Low angle = 13 degrees

I-20 Blue Standard Nozzle Performance Data

I-20 Blue Standard Nozzle Rack I-20 Blue Standard Nozzle Performance Data (P/N 782900)
Nozzle	Pressure (PSI)	Radius (ft.)	Flow (GPM)	Precip in/hr
Nozzle	Pressure (PSI)	Radius (ft.)	Flow (GPM)
1.5	25	29	1.2	0.27	0.32
	35	31	1.4	0.28	0.32
	45	31	1.5	0.30	0.35
	55	32	1.8	0.34	0.39
	65	32	1.9	0.36	0.41
2.0	25	33	1.4	0.25	0.29
	35	33	1.7	0.30	0.35
	45	34	2.0	0.33	0.38
	55	34	2.1	0.35	0.40
	65	32	2.3	0.43	0.50
2.5	25	33	1.7	0.30	0.35
	35	35	2.1	0.33	0.38
	45	35	2.5	0.39	0.45
	55	35	2.6	0.41	0.47
	65	35	2.9	0.46	0.53
3.0	25	35	2.2	0.35	0.40
	35	36	2.7	0.40	0.46
	45	38	3.0	0.40	0.46
	55	39	3.4	0.43	0.50
	65	39	3.7	0.47	0.54
4.0	25	37	3.0	0.42	0.49
	35	39	3.5	0.44	0.51
	45	40	4.0	0.48	0.56
	55	41	4.5	0.52	0.60
	65	41	4.8	0.55	0.63
5.0	25	37	3.7	0.52	0.60
	35	39	4.5	0.57	0.66
	45	42	5.0	0.55	0.63
	55	42	5.7	0.62	0.72
	65	42	6.2	0.68	0.78
6.0	25	38	4.3	0.57	0.66
	35	40	5.6	0.67	0.78
	45	43	6.0	0.62	0.72
	55	44	6.7	0.67	0.77
	65	44	7.3	0.73	0.84
8.0	25	37	6.0	0.84	0.97
	35	41	7.0	0.80	0.93
	45	44	8.0	0.80	0.92
	55	46	9.0	0.82	0.95
	65	46	9.8	0.89	1.03
Note: All preciptation rates calculated for 180 degree operation. For the precipitation rate for a 360 degree sprinkler, divide by 2.

I-20 Low Angle Nozzle Performance Data

I-20 Low Angle Nozzle Rack I-20 Low Angle Nozzle Performance Data (P/N 782900)
Nozzle	Pressure (PSI)	Radius (ft.)	Flow (GPM)	Precip in/hr
Nozzle	Pressure (PSI)	Radius (ft.)	Flow (GPM)
2.0 LA	30	25	1.6	0.49	0.57
	40	27	1.9	0.50	0.58
	50	28	2.1	0.52	0.60
	60	30	2.3	0.49	0.57
2.5 LA	30	27	2.1	0.55	0.64
	40	30	2.5	0.53	0.62
	50	33	2.8	0.49	0.57
	60	35	3.0	0.47	0.54
3.5 LA	30	29	2.8	0.64	0.74
	40	32	3.1	0.58	0.67
	50	35	3.5	0.55	0.64
	60	37	3.8	0.53	0.62
4.5 LA	30	29	3.4	0.78	0.90
	40	32	3.9	0.73	0.85
	50	35	4.4	0.69	0.80
	60	37	4.7	0.66	0.76
Note: All preciptation rates calculated for 180 degree operation. For the precipitation rate for a 360 degree sprinkler, divide by 2.

I-20 High Flow Nozzle Performance Data

I-20 High Flow Nozzle Rack I-20 High Flow Nozzle Performance Data (P/N 444800)
Nozzle	Pressure (PSI)	Radius (ft.)	Flow (GPM)	Precip in/hr
Nozzle	Pressure (PSI)	Radius (ft.)	Flow (GPM)
10	40	42	8.4	0.92	1.06
	50	43	9.5	0.99	1.14
	60	45	10.5	1.00	1.15
	70	47	11.4	0.99	1.15
13	40	43	10.9	1.13	1.31
	50	44	12.3	1.22	1.41
	60	45	13.6	1.29	1.49
	70	47	14.8	1.29	1.49
6.0 LA	30	31	4.2	0.84	0.97
	40	35	5.0	0.79	0.91
	50	37	5.8	0.82	0.94
	60	39	6.3	0.80	0.92
8.0 LA	40	37	6.7	0.94	1.09
	50	39	7.7	0.97	1.13
	60	41	8.5	0.97	1.12
	70	41	9.2	1.05	1.22
Note: All preciptation rates calculated for 180 degree operation. For the precipitation rate for a 360 degree sprinkler, divide by 2.

I-20 18' Short Radius Nozzle Performance Data

I-20 Nozzle Rack I-20 18' Short Radius Nozzle Performance Data (P/N 466100)
Nozzle	Pressure (PSI)	Radius (ft.)	Flow (GPM)	Precip in/hr
Nozzle	Pressure (PSI)	Radius (ft.)	Flow (GPM)
.50 SR	30	17	0.36	0.24	0.28
	40	17	0.43	0.29	0.33
	50	18	0.50	0.30	0.34
	60	19	0.57	0.30	0.35
1.0 SR	30	17	0.78	0.52	0.60
	40	17	0.90	0.60	0.69
	50	18	1.0	0.59	0.69
	60	19	1.1	0.59	0.68
2.0 SR	30	17	1.4	0.93	1.08
	40	17	1.7	1.13	1.31
	50	18	2.0	1.19	1.37
	60	19	2.2	1.17	1.35
Note: All preciptation rates calculated for 180 degree operation. For the precipitation rate for a 360 degree sprinkler, divide by 2.

I-20 25' Short Radius Nozzle Performance Data

I-20 Nozzle Rack I-20 25' Short Radius Nozzle Performance Data (P/N 466100)
Nozzle	Pressure (PSI)	Radius (ft.)	Flow (GPM)	Precip in/hr
Nozzle	Pressure (PSI)	Radius (ft.)	Flow (GPM)
.75 SR	30	23	0.58	0.21	0.24
	40	24	0.68	0.23	0.26
	50	25	0.75	0.23	0.27
	60	26	0.83	0.24	0.27
1.5 SR	30	23	1.1	0.40	0.46
	40	24	1.3	0.43	0.50
	50	25	1.5	0.46	0.53
	60	26	1.6	0.46	0.53
3.0 SR	30	23	2.5	0.91	1.05
	40	24	2.7	0.90	1.04
	50	25	3.0	0.92	1.07
	60	26	3.1	0.88	1.02
Note: All preciptation rates calculated for 180 degree operation. For the precipitation rate for a 360 degree sprinkler, divide by 2.

I-20 DIMENSIONS CHART

	I-20-00	I-20-04	I-20-06	I-20-12
Overall Height	7-3/4"	7-1/8"	9-7/8"	17"
Pop-up Height	N/A	4"	6"	12"
Exposed Diameter	1-3/4"	1-3/4"	1-3/4"	1-3/4"
Inlet Size	3/4" Female NPT	3/4" Female NPT	3/4" Female NPT	3/4" Female NPT

Resources

Literature

[15]

Topic	Title [44]	Rating [45]
Installation Procedures, Video	Rotor Nozzle Installation Procedure >> Read More [46]	4.85
FAQs, Troubleshooting, Video	What are some troubleshooting tips for a rotor that doesn't fully pop-up? >> Read More [47]	4.6
FAQs	What is the purpose of the little hole that leaks water on the side of my rotor's stem? >> Read More [48]	4.3
Installation Procedures	Staking Kit and Reclaimed Water Identification >> Read More [49]	4.25
Adjustment, Installation Procedures	I-20 Rotary Sprinkler Adjustment Instructions >> Read More [50]	4.15
Adjustment, FAQs, Video	How do I adjust the radius or distance of throw on my Hunter rotor? >> Read More [51]	4
Troubleshooting, Video	Why has my rotor stopped rotating? >> Read More [52]	3.8
FAQs, Installation Procedures	What are the effects of Pipe Dope on ABS Plastic? >> Read More [53]	3.8
FAQs	Can I replace another brand's sprinkler with the Hunter brand? >> Read More [54]	3.55
Adjustment, FAQs	How do I obtain a Hunter adjustment wrench? >> Read More [55]	3.5

I-20

I-20

A High Performance Rotor with the Diversity and Efficiency for Any Site

Product Tabs

Automatic Arc Return [1]

Non-Strippable Drive [2]

Part- and Full-Circle in One Model [3]

Headed and Slotted Set Screw [4]

FloStop® Control [5]

Optional Reclaimed Water ID [6]

Stainless Steel Riser [7]

Drain Check Valve (up to 10 ft. of elevation) [8]

I-20 Models Chart

OPTION

SPECIFICATION BUILDER (PLASTIC)

SPECIFICATION BUILDER (STAINLESS STEEL)

EXAMPLES

1/2" and 3/4" Inlet Rotor Comparison Chart

I-20 Blue Standard Nozzle Performance Data

I-20 Blue Standard Nozzle Performance Data (P/N 782900)

I-20 Low Angle Nozzle Performance Data

I-20 Low Angle Nozzle Performance Data (P/N 782900)

2.0

LA

2.5

LA

3.5

LA

4.5

LA

I-20 High Flow Nozzle Performance Data

I-20 High Flow Nozzle Performance Data (P/N 444800)

10

13

6.0

LA

8.0

LA

I-20 18' Short Radius Nozzle Performance Data

I-20 18' Short Radius Nozzle Performance Data (P/N 466100)

.50

SR

1.0

SR

2.0

SR

I-20 25' Short Radius Nozzle Performance Data

I-20 25' Short Radius Nozzle Performance Data (P/N 466100)

.75

SR

1.5

SR

3.0

SR

I-20 DIMENSIONS CHART

Literature

Manuals

Photos

Specifications

Video

View All Support Articles for This Product [56]

I-20 Blue Standard Nozzle
Performance Data (P/N 782900)

I-20 Low Angle Nozzle
Performance Data (P/N 782900)

I-20 High Flow Nozzle
Performance Data (P/N 444800)

I-20 18' Short Radius Nozzle
Performance Data (P/N 466100)

I-20 25' Short Radius Nozzle
Performance Data (P/N 466100)