I-20

Quick Specs

Application: Residential/Commercial

Radius: 17’ to 46’

Flow Rate: 0.36 to 14.8 GPM

Inlet Size: 3/4'' NPT

HomeownerProfessional

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

With 18 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

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	R	NCV = Without check valve R = Reclaimed water ID	1.5 to 4.0 = Factory installed nozzle number
I-20-04 = 4" Pop-up		NCV, R
I-20-06 = 6" Pop-up		R
I-20-12 = 12" Pop-up		R

SPECIFICATION BUILDER (STAINLESS STEEL)

MODELS	STANDARD FEATURES	FEATURE OPTIONS	NOZZLE OPTIONS
I-20-04-SS = 4" Pop-up	Adjustable arc, plastic riser, check valve, 8 standard nozzles, and 4 low-angle nozzles	NCV, R	R = Reclaimed water ID HS = High speed HS-R = High speed and reclaimed water ID B = BSP inlet threads	#4 to #28 = Factory installed nozzle number
I-20-06-SS = 6" Pop-up	R

MODELS

STANDARD FEATURES

FEATURE OPTIONS

NOZZLE OPTIONS

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

Adjustable arc, plastic riser, check valve, 8 standard nozzles, and 4 low-angle nozzles

NCV, R

R = Reclaimed water ID

HS = High speed

HS-R = High speed and reclaimed water ID

B = BSP inlet threads

#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 - NCV - R - 4.0	12" pop-up, adjustable arc, without 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

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
BOLD = Optimum nozzle performance 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
BOLD = Optimum nozzle performance 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
BOLD = Optimum nozzle performance 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
BOLD = Optimum nozzle performance 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
BOLD = Optimum nozzle performance 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

Support

Topic	Title	Rating
Installation Procedures, Video	Rotor Nozzle Installation Procedure STEP ONESTEP TWOInsert the plastic end of the Hunter adjustment wrench into the lifting socket of the rotor and turn 90 degrees. Pulling up the riser will allow access to the ... >> Read More	5
FAQs, Troubleshooting, Video	What are some troubleshooting tips for a rotor that doesn't fully pop-up? Rotary sprinklers require a certain amount of pressure and flow to operate properly. If the rotor does not receive the pressure it needs to pop up a leaky head will result.Her... >> Read More	5
Adjustment, Installation Procedures	I-20 Rotary Sprinkler Adjustment Instructions Aligning the Right Fixed Side of ArcThe right side of the arc can be realigned to avoid wet walkways or a dry turf area. One way to realign the right stop is to turn the whole... >> Read More	5
Adjustment, FAQs	How do I adjust the arc on my Hunter rotor? The easiest way to make adjustments on your Hunter rotor is to use a Hunter adjustment wrench. There are two adjustments that can be made on your rotor, the arc and the radius... >> Read More	5
Installation Procedures	Staking Kit and Reclaimed Water Identification Hunter makes an excellent assortment of accessory items that either connect to, or work in tandem with many of our products.Highlighted here are just a couple of those accesso... >> Read More	4.5
Adjustment, FAQs, Installation Procedures	Can I shut the flow off to one head? If you have the most popular PGP model, there is a "blank" nozzle on the gray low-angle nozzle rack. Or you can simply remove the red nozzle and put some bubble gum in it, th... >> Read More	4.5
Adjustment, FAQs, Video	How do I adjust the radius on my Hunter rotor? The easiest way to make adjustments on your Hunter rotor is to use a Hunter adjustment wrench. This adjustment wrench is available through the Hunter online store.There are tw... >> Read More	4
FAQs	What is the purpose of the little hole that leaks water on the side of my rotor's stem? It's a combination drain hole and flush hole.It's a drain hole because we need to drain the water from below the nozzle turret so it doesn't push up on the nozzle turret in fr... >> Read More	4
FAQs, Installation Procedures	What are the effects of Pipe Dope on ABS Plastic? Over the last few years we've had several customers call with questions regarding the effects of oil-based pipe dope compounds on the threads of Hunter sprinklers. In case you... >> Read More	3.65
Troubleshooting, Video	Why has my rotor stopped rotating? Hunter rotary sprinklers operate on a “gear drive” system. When in operation, water turns a small turbine in the base of the sprinkler, which drives a series of gears that cau... >> Read More	3.6

View All Support Articles for This Product

Rotor Comparison Chart (1/2" and 3/4")

	PGJ	SRM	PGP-ADJ	PGP Ultra®	I-20
FEATURES
Inlet Size	1/2"	1/2"	3/4"	3/4"	3/4"
Radius	15' - 37'	15' - 30'	22' - 52'	17' - 46'	17' - 46'
Flow Rate (GPM)	0.64 - 5.3	0.42 - 3.4	0.5 - 14.1	0.36 - 14.8	0.36 - 14.8
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
Precipitation Rate (in/hr)	0.6	0.45	0.4	0.4	0.4
Nozzle Trajectory	14º	18º	STD = 25º, Low Angle = 13º	STD = 25º, Low Angle = 13º	STD = 25º, Low Angle = 13º
Check Valves	Available	Available	Available	Factory Option	Pre-Installed
Specialty Nozzles	N/A	N/A	Factory Option	Factory Option	Pre-Installed
Check Height (feet)	7'	7'	4'	10'	10'
Factory-Installed Check valve				Optional	10'
Nozzle Options	8	6	27	22	22
Warranty	2 Years	1 Year	2 Years	3 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
Available Short Radius Nozzles
FloStop Control
Available Stainless Steel Riser
Applications
Residential
Low Pressure Areas
Riser-Mounted Sprinklers
Ground Cover and/or Shrubs
Reclaimed Water
Commercial
Athletic Fields
High Vandalism Areas

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Site Study

I-20

Quick Specs

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

Product Tabs

I-20 Models Chart

OPTION

SPECIFICATION BUILDER (PLASTIC)

SPECIFICATION BUILDER (STAINLESS STEEL)

EXAMPLES

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

Specifications

Video

Rotor Comparison Chart (1/2" and 3/4")

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)