Coolant Hose and Systems
Hose Shelf Life
Storage environment, along with rubber materials can vary the shelf life limit. Shelf life is
difficult to quantify as many variables affect the hose. Proper storage precautions can result
in three to five years shelf life. Beyond this time there can be a significant service life decrease,
depending on storage environment variables. Some variables include:
Hose should be stored in a cool, dry area never exceeding +100°F (+38°C). If stored below
freezing, pre-warming may be required prior to handling, testing and placing into service. Store
hose in original container. Never stack hose too high, as its weight can crush hose at the bottom
of the stack. Gates recommends hose in extended storage be visually inspected and tested prior
to use. Hose judged marginal should be replaced to avoid potential failure, property damage
or bodily injury. Store hose on a first-in/ first-out basis. Unusually long storage, or poor storage
environment can deteriorate hose, reduce performance and may lead to premature failure.
Molded Coolant Hose
Factory molded to fit specific applications. Similar to OEM specifications. Approved
for marine applications.
ELECTROCHEMICAL
RESISTANT
A16
l www.gates.com
• Recommended for upper, lower, by-pass, heater and other coolant hose applications.
• Heat and ozone resistant cover.
• Engineered to resist electrochemical degradation – the leading cause of hose failure.
• Re-engineered materials resist vacuum collapse. This reduces the need for internal springs in many applications.
• Meets SAE 20R4 and 20R3 Type EC Class D-1 and D-2 specifications.
Temperature Rating: -40°F to 275°F (-40°C to 135°C) in coolant hose applications
NOTE: Gates recommends replacing standard worm drive and spring loaded clamps with
PowerGrip® SB clamps each time a new coolant hose is installed.
CAUTION: Do not use for fuel or oil transfer applications.
(Product Type 4261)
For sizes and configurations, see Gates 431-2040 Competitive Number I.D. Guide.
Coolant Hose and Systems
Branched Radiator Hose
Molded to fit specific applications. Factory quality connections are durable,
and eliminate coolant leaks.
• Engineered to resist electrochemical degradation – the leading cause of hose failure.
• Heat & ozone resistant cover
• Meets SAE 20R4 and 20R3 Type EC Class D-1 and D-2 specifications.
Temperature Rating: -40°F to +275°F (-40°C to +135°C) in coolant hose applications.
NOTE: Gates recommends replacing standard worm drive and spring loaded clamps with
PowerGrip SB Clamps each time a new coolant hose is installed.
CAUTION: Do not use for fuel or oil transfer applications
(Product Type 4294)
ELECTROCHEMICAL
RESISTANT
Small Inside Diameter Molded Coolant Hose
Specially designed, OEM style factory-molded hose to fit today’s smaller, tighter-fitting engine
compartments. Can be used for coolant, water and air applications. Approved for marine
applications.
• Similar to OEM specifications.
• Has all the quality features of Gates molded coolant hose.
• Engineered to resist electrochemical degradation – the leading cause of hose failure.
• Inside diameters range from 1⁄4" to 1".
• Meets SAE 20R3 Type EC Class D-1 and D-2 specifications.
Temperature rating: -40°F to 275°F (-40°C -135°C) in coolant hose applications.
NOTE: Gates recommends replacing standard worm drive and spring loaded clamps with
PowerGrip SB clamps each time a new coolant hose is installed.
CAUTION: Do not use for fuel or oil transfer applications.
(Product Type 4257)
ELECTROCHEMICAL
RESISTANT
www.gates.com l
A17
Coolant Hose and Systems
Vulco-Flex® II Coolant Hose
Gates Vulco-Flex II hose will bend in almost any direction. It easily replicates the angles and planes of a
wide variety of expensive original equipment coolant hose, for quick, easy, replacement.
• Improved sealing surface for greater leak resistance and increased flexibility for easier installation
• Heat and ozone resistant cover
• Rated for SAE 20R5 Class D-2 performance
• High temperature rating up to +257°F(+125°C)
NOTE: Gates recommends replacing clamps each time a new coolant hose is installed.
CAUTION: Do not use for fuel or oil transfer applications. (Product Type 4254)
Part
No.
25150
25152
25154
25157
25180
25249
25250
25251
25252
25253
25254
25255
25257
25260
25262
25265
I.D.
Inches (mm)
11⁄8 (29)
11⁄8 (29) 11⁄8 (29) 11⁄8 (29) 11⁄8 (29), 11⁄4 (32) 11⁄4 (32)
11⁄4 (32)
11⁄4 (32)
11⁄4 (32)
11⁄4 (32)
11⁄4 (32)
11⁄4 (32)
11⁄4 (32)
11⁄4 (32)
11⁄4 (32)
11⁄4 (32)
Length
Inches (mm)
12 (305)
15 (381)
18 (457)
23 (584)
19 (483)
71⁄2 (190)
91⁄2 (240)
13 (330)
15 (381)
17 (432)
181⁄2 (470)
20 (508)
23 (584)
26 1/2 (673)
30 (762)
35 (889)
Part
No.
25269
25284
25300
25302
25305
25307
25309
25311
25321
25384
25409
25428
25472
25473
25474
25476
25477
I.D.
Inches (mm)
11⁄4 (32)
11⁄4 (32), 13⁄8 (35)
11⁄4 (32), 11⁄2 (38)
11⁄4 (32), 11⁄2 (38) 11⁄4 (32), 11⁄2 (38) 11⁄4 (32), 11⁄2 (38) 11⁄4 (32), 11⁄2 (38) 11⁄4 (32), 11⁄2 (38) 11⁄4 (32), 11⁄2 (38) 13⁄8 (35)
13⁄8 (35), 11⁄2 (38) 13⁄8 (35), 15⁄8 (41) 11⁄2 (38) 11⁄2 (38) 11⁄2 (38) 11⁄2 (38) 11⁄2
Length
Inches (mm)
41 (1041)
26 (660)
12 (305)
151⁄2 (394)
191⁄2 (495)
23 (584)
26 (660)
29 (737)
44 (1118)
25 (635)
26 (660)
17 (432)
8 (205)
101⁄2 (265)
12 (305)
14 (356)
151⁄2 (394)
Part
No.
25478
25480
25482
25484
25487
25490
25499
25526
25527
25528
25530
25532
25535
25582
25804*
25806*
25808*
I.D.
Inches (mm)
11⁄2 (38) 11⁄2 (38)
11⁄2 (38)
11⁄2 (38)
11⁄2 (38)
11⁄2 (38)
11⁄2 (38) 11⁄2 (38), 13⁄4 (44) 11⁄2(38), 13⁄4 (44) 11⁄2 (38), 13⁄4 (44) 11⁄2 (38), 13⁄4 (44) 11⁄2 (38), 13⁄4 (44) 11⁄2 (38), 13⁄4 (44) 11⁄2 (38), 2 (51) 11⁄2 (38) 11⁄2 (38) 11⁄2 (38)
Length
Inches (mm)
17 (394)
20 (508)
22 (559)
25 (635)
30 (762)
35 (889)
48 (1219)
13 1/5 (335)
15 (381)
161⁄2 (419)
20 (508)
22 (559)
27 (686)
22 (559)
193⁄4 (505)
231⁄8 (589)
255⁄8 (650)
* 90° end
Green Stripe® Straight Coolant Hose
Stick hose designed for demanding heavy-duty coolant/air applications.
Approved for Marine Applications.
• Two-ply bias fabric construction to maximize flexibility and strength.
• Resists “cold water leaks” thanks to advanced EPDM tube and cover that stay soft and pliable, even
under adverse operating conditions.
• Reduces water loss from water permeating the hose wall and cover, a distinct advantage over silicone.
• Exceeds SAE 20R1 Type EC (Class D-1 Tube, and cover, Standard Wall).
• Cover marked in one-inch increments to facilitate approximate cut lengths. Allows “custom-fit" installations.
Engineered to resist electrochemical degradation – the leading cause of hose failure.
CAUTION: Do not use for fuel or oil transfer applications.
NOTE: For a maintenance free connection, use PowerGrip® SB Clamps.
Temperature rating: –40°F to +257°F (–40°C to +125°C). Packaging: 3 ft. lengths. (Product Type 4168)
ELECTROCHEMICAL
RESISTANT
Part
No.
24212
24214
24216
24218
24220
A18
I.D.
(In.)
3
⁄4
7
⁄8
1
11⁄8
11⁄4
Work.
Press.
(psi)
100
100
100
100
100
Part
No.
24222
24224
24226
24228
24230
l www.gates.com
I.D.
(In.)
13⁄8
11⁄2
15⁄8
13⁄4
17⁄8
Work.
Press.
(psi)
100
100
85
75
75
Part
No.
24232
24234
24236
24238
24240
I.D.
(In.)
2
21⁄8
21⁄4
23⁄8
21⁄2
Work.
Press.
(psi)
60
60
60
60
60
Part
No.
24242
24244
24246
24248
24250
I.D.
(In.)
25⁄8
23⁄4
27⁄8
3
31⁄8
Work.
Press.
(psi)
60
60
55
25
25
Part
No.
24252
24256
24260
24264
24272
I.D.
(In.)
31⁄4
31⁄2
33⁄4
4
4 1⁄2
Work.
Press.
(psi)
20
18
18
12
12
Coolant Hose and Systems
Green Stripe® 4-Ply Coolant Hose
For severe operating conditions found on stationary engines, construction equipment and off-road
vehicle applications. Nitrile tube specially compounded to handle common coolants and additives.
• Four ply woven, heavy-duty fabric reinforcement
• Neoprene cover resists heat, abrasion and oil.
• Handles higher temperatures and resists petroleum additives.
• Exceeds SAE 20R1 (Class B Tube, Class C Cover, Heavy Wall).
• Reduces water loss from water permeating the hose wall and cover, a distinct advantage over silicone.
• Engineered to resist electrochemical degradation – the leading cause of hose failure.
CAUTION: Do not use for gasoline or diesel transfer applications.
Maximum constant working temperature: –40°F to +212°F (–40°C to +100°C), intermittent to 257°F (125°C)
Packaging: 3 ft. lengths, 1 each. (Product Type 4179G)
Part
No.
24428
24430
24432
24434
I.D.
(In.)
13⁄4
17⁄8
2
21⁄8
Work.
Press.
(psi)
100
100
90
90
Part
No.
24436
24438
24440
24442
I.D.
(In.)
21⁄4
23⁄8
21⁄2
25⁄8
Work.
Press.
(psi)
90
90
75
75
Part
No.
24444
24446
24448
24450
I.D.
(In.)
23⁄4
27⁄8
3
31⁄8
Work.
Press.
(psi)
60
60
60
60
Part
No.
24452
24456
24458
24460
I.D.
(In.)
31⁄4
31⁄2
35⁄8
33⁄4
Work.
Press.
(psi)
50
50
50
50
ELECTROCHEMICAL
RESISTANT
Part
No.
24464
24480
I.D.
(In.)
4
5
Work.
Press.
(psi)
40
40
Vulco Straight Coolant Hose
Specially engineered stick hose is ideal for straight coolant/air connections in automotive,
stationary engine, industrial and home applications.
• Heat-resistant cover.
• Meets SAE 20R1 Standard Wall Class D-2 requirements.
• Cover marked in one-inch increments for easy measuring and cutting... allows “custom fit” light-duty coolant installations.
Temperature rating: -40°F to 257°F (-40°C to 125°C)
Packaging: 3 ft. lengths.
CAUTION: Do not use for fuel or oil transfer applications.
(Product Type 4178)
Part
No.
24008
24012
24014
24016
24018
I.D.
(In.)
1
⁄2
3
⁄4
7
⁄8
1
11⁄8
Work.
Press.
(psi)
105
80
80
75
75
Part
No.
24020
24022
24024
24026
24028
I.D.
(In.)
11⁄4
13⁄8
11⁄2
15⁄8
13⁄4
Work.
Press.
(psi)
65
65
60
55
50
Part
No.
24030
24032
24034
24036
24038
I.D.
(In.)
17⁄8
2
21⁄8
21⁄4
23⁄8
Work.
Press.
(psi)
50
50
45
40
40
Part
No.
24040
24042
24044
24046
24048
I.D.
(In.)
21⁄2
25⁄8
23⁄4
27⁄8
3
Work.
Press.
(psi)
35
30
30
25
25
Part
No.
24052
24056
24064
I.D.
(In.)
31⁄4
31⁄2
4
Work.
Press.
(psi)
20
18
12
www.gates.com l
A19
Coolant Hose and Systems
Green Stripe® Vulco-Flex® Coolant Hose
Heavy-duty flexible hose designed to replace straight or curved coolant hoses. The benefit is
maximum coverage with minimum inventory. Hose inside diameter remains constant from
end to end. No convolutions inside hose so tube is smooth, allowing free coolant flow.
Approved for Marine Applications.
ELECTROCHEMICAL
RESISTANT
Part
No.
26501
26502
26503
26504
26505
26506
26507
26508
26509
26510
26511
26512
26513
26514
26515
A20
I.D.
Inches (mm)
13⁄4 (44) 13⁄4 (44)
13⁄4 (44), 2 (51) 13⁄4 (44), 2 (51) 13⁄4 (44), 2 (51) 13⁄4 (44), 2 (51) 2 (51) 2 (51) 2 (51) 2 (51) 2 (51) 2 (51) 2 (51) 2 (51), 21⁄4 (57)
2 (51), 21⁄4 (57) l www.gates.com
• Excellent flexibility, yet collapse and kink resistant.
• Extra strength fabric reinforcement with helical steel wire spiral molded between tube and cover.
• Heat resistant construction throughout.
• EPDM tube and neoprene cover for extended service life.
• Performs to SAE 20R5 Type EC Class D-2 specifications.
• Engineered to resist electrochemical degradation – the leading cause of hose failure.
Temperature rating: –40°F to +257°F (–40°C to +125°C)
Working pressure 40 psi maximum.
Packaging: 5 per carton.
CAUTION: Do not use for fuel or oil transfer applications.
(Product Type 4284)
Length
Inches (mm)
131⁄2 (343)
161⁄2 (419)
10 (254)
161⁄2 (419)
19 (483)
231⁄2 (597)
91⁄2 (241)
121⁄4 (311)
141⁄2 (368)
17 (432)
20 (508)
24 (610)
33 (838)
81⁄2 (216)
15 (381)
Part
No.
26516
26517
26518
26519
26520
26521
26522
26523
26524
26525
26526
26527
26528
26529
26530
I.D.
Inches (mm)
2 (51), 21⁄4 (57) 2 (51), 21⁄4 (57) 2 (51), 21⁄2 (64) 21⁄4 (57) 21⁄4 (57) 21⁄4 (57) 21⁄4 (57) 21⁄4 (57) 21⁄4 (57) 21⁄4 (57) 21⁄4 (57), 21⁄2 (64) 21⁄4 (57), 21⁄2 (64) 21⁄4 (57), 21⁄2 (64) 21⁄2 (64) 21⁄2 (64) Length
Inches (mm)
171⁄2 (445)
25 (635)
20 (508)
9 (229)
11 (279)
14 (356)
17 (432)
19 (483)
24 (610)
27 (686)
18 (457)
21 (533)
25 (635)
11 (279)
14 (356)
Part
No.
26531
26532
26533
26534
26535
26536
26537
26538
26601
26602
26603
26611
26612
I.D.
Inches (mm)
21⁄2 (64) 21⁄2 (64) 21⁄2 (64) 23⁄4 (70) 23⁄4 (70) 23⁄4 (70) 23⁄4 (70) 3 (76) 13⁄4 (44) 13⁄4 (44) 13⁄4 (44) 13⁄4 (44) 13⁄4 (44) Length
Inches (mm)
16 (406)
24 (610)
28 (711)
7 (178)
14 (356)
18 (457)
32 (813)
37 (940)
6 (152)
81⁄2 (216)
11 (279)
19 (483)
231⁄2 (597)
Coolant Hose and Systems
Wire-Inserted Green Stripe® Coolant Hose
Provides the ability to replace many sizes of tailor-made curved hoses. Results in maximum
coverage with minimum inventory. Approved for Marine Applications.
• Heavy-duty fabric reinforcement with helical carbon steel wire.
• Bends easily to make curved connections.
• Cuts easily with knife and wire cutters to reduce installation time.
• Exceeds SAE 20R2 Type EC (Class D2 Tube and cover) except in vacuum applications.
• Engineered to resist electrochemical degradation – the leading cause of hose failure.
• Resists water permeation.
Temperature rating: –40°F to +257°F (–40°C to +125°C)
Packaging: Available in 5 ft. and 10 ft. lengths, individually cartoned.
CAUTION: Do not use for oil, or fuel transfer applications.
(Product Type 4685)
Part No.
5 Foot
24916
24918
24920
24922
24924
24926
24928
24930
24932
24934
24936
Part No.
10 Foot
28316
—
28320
—
28324
28326
28328
28330
28332
—
28336
I.D.
(In.)
1
11⁄8
11⁄4
13⁄8
11⁄2
15⁄8
13⁄4
17⁄8
2
21⁄8
21⁄4
Work.
Press.
(psi)
100
100
100
85
85
75
75
60
60
55
55
Vacuum
(In. Hg.)
25
25
25
25
20
20
20
20
20
20
20
Min.
Bend
Radius
(In.)
2
21⁄2
21⁄2
3
31⁄2
31⁄2
4
41⁄2
41⁄2
51⁄2
51⁄2
Part No.
5 Foot
24938
24940
24942
24944
24946
24948
24956
24964
24980
24996
Part No.
10 Foot
—
28340
—
28344
—
28348
28356
—
—
—
I.D.
(In.)
23⁄8
21⁄2
25⁄8
23⁄4
27⁄8
3
31⁄2
4
5
6
ELECTROCHEMICAL
RESISTANT
Work.
Press.
(psi)
50
50
40
40
40
40
35
30
15
15
Vacuum
(In. Hg.)
20
20
15
15
15
15
15
10
5
5
Min.
Bend
Radius
(In.)
6 1⁄2
6 1⁄2
7 1⁄2
7 1⁄2
9
9
12
20
24
30
NOTE: Long spans must be supported every 3 feet.
Green Stripe® Vibraflex® Coolant Hose
For heavy-duty applications requiring short length hose that must absorb vibration and/or fitting
misalignment. High flexibility reduces installation time and provides lower cost-per-mile operation.
• Oil and heat resistant nitrile tube.
• Oil, abrasion and heat resistant neoprene cover.
• Exceeds SAE J20 (Class B Tube and Class C Cover).
• Two-ply fabric reinforced.
Temperature rating: -40°F to 212°F (-40° to 100°C)
Packaging: One each, not cartoned.
CAUTION: Do not use for gasoline or diesel transfer applications.
(Product Types 3177 and 4177W)
Part
No.
23505 23511 23515 23520 23531
23533 I.D. x Lgth.
(In.)
11⁄4 x 4
13⁄8 x 5
11⁄2 x 5
13⁄4 x 5
2 x 31⁄2
2 x 5
Work.
Press.
(psi)
70
60
60
55
50
50
Part
No.
23547 23557 23559 23562 23550 23566 I.D. x Lgth.
(In.)
21⁄4 x 41⁄2
23⁄8 x 5
23⁄8 x 61⁄4
21⁄2 x 41⁄2
21⁄2 x 6
23⁄4 x 31⁄4
Work.
Press.
(psi)
40
35
35
35
35
30
Part
No.
23567 23568 23572 23575 23585 I.D. x Lgth.
(In.)
23⁄4 x 41⁄2
23⁄4 x 53⁄8
3 x 4
3 x 7
31⁄2 x 51⁄2
Work.
Press.
(psi)
30
30
25
25
25
www.gates.com l
A21
Coolant Hose and Systems
Silicone Coolant Hose
Extra long-lasting hose constructed with silicone rubber. Ideal for extremely high temperature
service in radiator, heater and other coolant transfer hose applications.
• Excellent for extreme ambient and radiant temperature conditions.
• Resists weathering, ozone, heat and coolant deterioration.
• Silicone tube and cover resist prolonged exposure to under-hood and coolant heat.
• Use PowerGrip SB clamps or silicone hose clamps.
• Exceeds SAE 20R1 (Class A Standard Wall).
Temperature rating: –70°F to +350°F (–56°C to +177°C)
Packaging: 3 ft. lengths. Individually polybagged.
CAUTION: Do not use for fuel or oil transfer applications.
(Product Type 4171)
Part
No.
24808
24810
24812
24814
24816
24818
I.D.
(In.)
1
⁄2
5
⁄8
3
⁄4
7
⁄8
1
11⁄8
Work.
Press.
(psi)
110
110
110
110
90
90
Part
No.
24820
24822
24824
24826
24828
24832
I.D.
(In.)
11⁄4
13⁄8
11⁄2
15⁄8
13⁄4
2
Work.
Press.
(psi)
85
85
85
80
80
75
Part
No.
24836
24838
24840
24844
24848
24850
I.D.
(In.)
21⁄4
23⁄8
21⁄2
23⁄4
3
31⁄8
Work.
Press.
(psi)
75
65
65
50
50
40
Part
No.
24852*
24856*
24860*
24864*
24872*
I.D.
(In.)
31⁄4
31⁄2
33⁄4
4
41⁄2
Work.
Press.
(psi)
40
35
35
35
25
* SB clamps not available, use silicone hose clamps
Hose I.D. Reducers
Slip inside current Gates hose to reduce inside diameters. Gives maximum coverage with
minimum hose inventory. Make it possible to adjust inside diameters of larger hoses for
emergency replacements.
• Quality rubber construction assures maximum dependability, no leakage.
• Fits Green Stripe straight or Green Stripe Vulco-Flex hoses.
CAUTION: Recommended for coolant and air applications only.
(Product Type 7736)
Part
No.
26390
11⁄4
26391
11⁄2
26392
A22
l www.gates.com
Size
(In.)
11⁄2 to
13⁄4 to
2 to 13⁄4
Part
No.
26393
2
26394
21⁄4
26395
Size
(In.)
21⁄4 to
21⁄2 to
3 to 21⁄2
Coolant Hose and Systems
Safety Stripe® Heater Hose
EPDM hose constructed for extra-long service life.
• Unaffected by most coolants and non-oil based coolant additives.
• Unaffected by high cooling system pressures.
• Good resistance to high temperatures for extended periods of time.
• Similar to SAE 20R3 Class D-2.
• Not recommended for heavy-duty truck, bus and off-road construction equipment — use Green Stripe® heater hose for these applications.
Temperature rating: –40°F to +257°F (–40°C to +125°C)
Packaging: Individual cartons or reels.
CAUTION: Do not use for fuel or oil transfer applications.
(Product Type 3270)
Part
No.
28407
28408
28409
28410
28411
28417
I.D.
(In.)
1
⁄4
5
⁄16
3
⁄8
1
⁄2
5
⁄8
5
⁄8
I.D.
(mm)
6.3
7.9
9.5
12.7
15.9
15.9
Length
(Ft.)
50
50
50
50
50
250 (reel)
Working
Pressure
(psi)
60
60
60
60
60
60
Part
No.
28412
28418
28413
28420
I.D.
(In.)
3
⁄4
3
⁄4
1
1
I.D.
(mm)
19.0
19.0
25.4
25.0
Length
(Ft.)
50
250 (reel)
50
25
Working
Pressure
(psi)
50
50
45
45
Polybagged Safety Stripe® Heater Hose
Ideal self-service package for retail oriented merchandising. Fits standard pegboard displays.
• Package measures 12" wide x 13" high.
• Hose comes in 6 ft. lengths of Gates Safety Stripe® heater hose in 3⁄8", 1⁄2", 5⁄8" and 3⁄4" I.D.
Packaging: 25 units per carton.
(Product Type 3269S)
Part
No.
28489
28490
28491
28492
I.D.
(In.)
3
⁄8
1
⁄2
5
⁄8
3
⁄4
I.D.
(mm)
9.5
12.7
15.9
19.0
www.gates.com l
A23
Coolant Hose and Systems
Firewall® Heater Hose
Extra heavy-duty hose designed for maximum durability. Easily recognized by its red cover.
• Unaffected by most coolants and non-oil based coolant additives.
• Unaffected by high cooling system pressures.
• Good resistance to high temperatures for extended periods of time.
• Similar to SAE 20R3 Class D-2.
Temperature rating: –40°F to +257°F (–40°C to +125°C)
Packaging: Individually cartoned.
CAUTION: Do not use for fuel or oil transfer applications.
(Product Type 3271)
Part
No.
28430
28431
28432
I.D.
(In.)
1
⁄2
5
⁄8
3
⁄4
I.D.
(mm)
12.7
15.9
19.0
Length
(Ft.)
50
50
50
Work.
Press.
(psi)
60
60
50
Part
No.
28433
28434
I.D.
(In.)
5
⁄8
3
⁄4
I.D.
(mm)
15.9
19.0
Length
(Ft.)
250
250
Work.
Press.
(psi)
60
50
Charter® Heater Hose
Economically priced heater hose – yet affords long service life. Tested by Gates to assure reliability.
• Good resistance to high temperatures.
• Moderate resistance to oil and grease contamination.
• Good resistance to non-oil based coolant additives.
• Similar to SAE 20R3 Class D-2.
Temperature rating: –40°F to +257°F (–40°C to +125°C)
CAUTION: Do not use for fuel or oil transfer applications.
Packaging: Individually cartoned.
(Product Type 3272)
Part
No.
28400
28403
28401
A24
I.D.
(In.)
1
⁄2
1
⁄2
5
⁄8
I.D.
(mm)
12.7
12.7
15.9
l www.gates.com
Length
(Ft.)
50
250
50
Working
Pressure
(psi)
60
60
60
Part
No.
28404
28402
28405
I.D.
(In.)
5
⁄8
3
⁄4
3
⁄4
I.D.
(mm)
15.9
19.0
19.0
Length
(Ft.)
250
50
250
Working
Pressure
(psi)
60
50
50
Coolant Hose and Systems
Green Stripe® Heater Hose
Heavy-duty construction assures dependable operation in truck, bus and off-road equipment
heater systems. For a maintenance free connection, install with Power-Grip® SB clamps.
Approved for Marine Applications.
• Green Stripe construction provides best cost-per-mile economics.
• Cover is abrasion resistant.
• Advanced EPDM tube, cover and reinforcement withstand high under-hood and coolant
temperatures. Designed for extended use without cracking or hardening.
• Engineered to resist electrochemical degradation – the leading cause of hose failure.
• Exceeds SAE 20R1 Type EC, Standard Wall Class D-1.
• Reduces water loss from water permeating the hose wall and cover, a distinct advantage over silicone.
Temperature rating: –40°F to +275°F (–40°C to +135°C)
Packaging: Individually cartoned.
CAUTION: Do not use for fuel or oil transfer applications.
(Product Type 3269S)
Part No.
50 Foot
28439
28441
28442
28443
28444
28445
Part No.
300 Foot
—
28447
28448
—
28449
—
I.D.
(In.)
1
⁄2
5
⁄8
3
⁄4
7
⁄8
1
1 1⁄4
I.D.
(mm)
12.7
15.9
19.0
22.2
25.4
31.7
ELECTROCHEMICAL
RESISTANT
Work.
Press.
(psi)
105
95
80
80
75
70
Silicone Heater Hose
Constructed with silicone rubber. Ideal for extremely high temperature service in radiator,
heater and other coolant transfer hose applications. Approved forMarine Applications.
• Reinforced with tough, high temperature resistant polyester textile cords.
• Exceptionally flexible.
• Highly resistant to weathering, coolant deterioration, ozone and temperature extremes.
• Exceeds SAE 20R3 Class A Tube and Cover.
• Also can be used for emission hose applications.
For proper installation, use Gates PowerGrip SB Clamps or Gates Silicone Hose Clamps.
Temperature rating: –70°F to +400°F (–57°C to +204°C)
Packaging: Individually cartoned.
CAUTION: Do not use for fuel or oil transfer applications.
(Product Type 3230)
Part No.
25 Foot
26239
26240
26241
26242
26244
I.D.
(In.)
3
⁄8
1
⁄2
5
⁄8
3
⁄4
1
I.D.
(mm)
9.5
12.7
15.9
19.0
25.4
O.D.
(In.)
.74
.87
.99
1.12
1.37
O.D.
(mm)
17.5
20.7
23.9
27.0
33.4
Lenght
(Ft.)
25
25
25
25
25
Work.
Press.
(psi)
60
60
60
50
45
www.gates.com l
A25
Coolant Hose and Systems
Heater Hose and Fuel Line Connectors
Unique single barb design provides greater sealability between single or dual inside diameter hoses.
• Using straight, elbow and tee shapes almost any hose configuration can be constructed.
• Glass reinforced nylon resists chemicals, gasoline, diesel fuels and temperatures from -40°F to 480°F (-40°C to 250°C).
• Bulkheads assure proper insertion depths.
• Anti-rotation device prevents hose twisting.
Packaging: 5 per package, except 1" which is 2 per package.
(Product Type 7315)
Straight Connectors
Elbow Connectors
Part
O.D.
O.D.
No.
(In.)
(mm)
28561
28562
28563
28564
28601
28600
28602
28603
28604
28605
28606
3
2.4
3.2
4.0
4.8
6.3
8.0
9.5
12.7
15.9
19.0
25.4
Part
No.
28571
28572
28573
28574
28621
28620
28622
28623
28624
28625
28626
⁄32
⁄8
5
⁄32
3
⁄16
1
⁄4
5
⁄16
3
⁄8
1
⁄2
5
⁄8
3
⁄4
1
1
Reducer Connectors
“Y” Connectors
Part
No.
28551
28552
28554
O.D.
(In.)
3
⁄32
1
⁄8
3
⁄16
O.D.
(mm)
2.4
3.2
4.8
Part
No.
28591
28592
28593
28594
28609
28610
28611
to 19.0
28612
O.D.
(mm)
2.4 to 3.2
3.2 to 4.0
4.8 to 6.7
7.9 to 9.5
9.5 to 12.7
12.7 to 15.9
15.9 3
19.0 to 25.4
Tee Reducer Connectors
Part
No.
28636
28637
l www.gates.com
Part
No.
28581
28582
28583
28584
28631
28630
28632
28633
28634
28635
28638
O.D.
(In.)
3
⁄32
1
⁄8
5
⁄32
3
⁄16
1
⁄4
5
⁄16
3
⁄8
1
⁄2
5
⁄8
3
⁄4
1
O.D.
(mm)
2.4
3.2
4.0
4.8
6.3
8.0
9.5
12.7
15.9
19.0
25.4
End 1
90° Tee End 2
O.D. O.D. O.D.O.D. O.D. O.D.
(In.) (mm) (In.) (mm) (In.) (mm)
5
5
⁄8 15.9 3⁄8 9.5
⁄8 15.9
3
3
3
⁄4 19.0
⁄8 9.5
⁄4 19.0
Quick-Lok® Connectors
Quick-Lok® Connectors
Quick-Lok connectors provide a fast,
easy way to connect replacement
heater hose on cars and trucks.
Part
No.
90°
28500
28501
28502
• Three sizes for more coverage and broader applications
• Design retains O-rings
• OE equivalent
A26
O.D.
(mm)
2.4
3.2
4.0
4.8
6.3
8.0
9.5
12.7
15.9
19.0
25.4
Tee Connectors
O.D.
(In.)
3
⁄32 to 1⁄8
1
⁄8 to 5⁄32
3
⁄16 to 1⁄4
5
⁄16 to 3⁄8
3
⁄8 to 1⁄2
1
⁄2 to 5⁄8
5
⁄8 to 3⁄4
⁄4 to 1
O.D.
(In.)
3
⁄32
1
⁄8
5
⁄32
3
⁄16
1
⁄4
5
⁄16
3
⁄8
1
⁄2
5
⁄8
3
⁄4
1
Part
No.
(In.)
28503
28504
28505
Tube
O.D. (In.)
5
⁄8
3
⁄4
3
⁄4
Hose
I.D. Strt.
5
⁄8
⁄8
3
⁄4
5
Coolant System Components
Unicoil* Hose Bending System
Now your customers can make their own custom hoses using stock heater hose and the new,
patented UnicoilTM hose bending system. Unicoil is perfect for customized engines, out-of-stock
situations and one-of-a-kind routing problems.
• No tools or special equipment needed
• Great for modified or customized engines
• Prevents kinks in tight hose bends
• Perfect solution when custom molded hose isn’t available
Available in these sizes: 1/4", 5/16", 3/8", 1/2", 3/4", 5/8", 1"
(Product Type 7316)
Unicoil Application Chart
Part No.
28514
28515
28516
28510
28511
28512
28517
Description
1/4" Unicoil
5/16" Unicoil
3/8" Unicoil
1/2" Unicoil
5/8" Unicoil
3/4" Unicoil
1" Unicoil
Qty.
1
1
1
1
1
1
1
Each coil bends up
to 90 degrees!
Use additional coils to make bends of 180 degrees or more!
Fits Gates:
Heater Hose
(Safety Stripe,
Firewall, Charter)
Fuel Line Hose
(Safety Stripe, MPI,
Barricade)
Transmission Oil
Cooler Hose
Unicoil* Assortment
Unicoil assortment contains three each of the six most popular sizes so you can quickly solve most
bent hose problems. The assortment has space for more backup coils and/or the optional 1" sizes.
Part No. 28519
Unicoil Assortment includes:
Part No.
28514
28515
28516
28510
28511
28512
Hose ID
1/4" (6.3mm)
5/16" (7.9mm)
3/8" (9.5mm)
1/2" (13mm)
5/8" (16mm)
3/4" (19mm)
Qty.
3
3
3
3
3
3
* Unicoil is a registered trademark of Unicoil International, Pty., Ltd.
www.gates.com l
A27
Coolant System Components
90° Molded Heater Hose
Especially designed for difficult heater hose applications requiring sharp 90° bends in the hose.
Eliminates the need for extensive inventory of OE type curved heater hose. Just 22 sizes handle
thousands of applications.
ELECTROCHEMICAL
RESISTANT
Arm
Lengths
(In.)
4 x 6
4 x 12
4 x 18
8 x 18
4 x 24
8 x 24
4 x 33
8 x 34
4 x 36
4 x 48
4 x 60
Arm
Lengths
(mm)
101.6 x 152.4
101.6 x 304.8
101.6 x 457.2
203.2 x 457.2
101.6 x 609.6
203.2 x 609.6
101.6 x 825.0
203.2 x 863.6
101.6 x 914.4
101.6 x 1219.2
101.6 x 1524.0
• Engineered to resist electrochemical degradation – the leading cause of hose failure.
• Resists water permeation.
• Similar to heater SAE 20R3 Type EC Class D-2.
• Use with heater hose connectors and bulk heater hose
for virtually complete molded heater hose coverage.
Temperature rating: -40°F to 275°F (-40°C to 135°C)
CAUTION: Do not use for fuel or oil transfer applications.
1⁄4"
(6.35mm)
18010*
18011*
—
—
—
—
—
—
—
—
—
5⁄16"
(7.9mm)
18020*
18021*
—
—
—
—
—
—
—
—
—
I.D. Part No.
3⁄8"
1⁄2"
(9.5mm) (12.7mm)
18030*
28460**
18031*
28461**
—
28462**
—
28463**
—
28464**
—
—
—
—
—
—
—
28465**
—
—
—
—
5⁄8"
(15.9mm)
28466**
28467**
28468**
28469**
28470**
—
—
—
28471**
28472**
28473**
5⁄8" x 3⁄4"
(15.0 x
19.1mm)
18079*
—
18076*
—
—
—
18077*
—
—
—
—
3⁄4" x 5⁄8"
(19.1 x
15.9mm)
18070*
18071*
—
18072*
18073*
—
—
18078*
18074*
—
18075*
3⁄4"
(19.0mm)
28474**
28475**
28476**
—
28477**
28478**
—
—
28479**
28480**
28481**
* Product Type 4257
** Product Type 4261
Dual I.D. Heater Hose
Specially designed for heater hose applications requiring changes in diameter.
• Engineered to resist electrochemical degradation – the leading cause of hose failure.
• Meets SAE 20R4 Type EC Class D-2.
• Use with hose connectors and bulk heater hose for virtually complete molded heater hose coverage.
Temperature rating: -40°F to 275°F (-40C to 135°C)
CAUTION: Do not use for fuel or oil transfer applications.
(Product Type 4257)
Length
(In.)
6
12
18
36
60
A28
l www.gates.com
1⁄2" x 5⁄8"
I.D.
18050
18051
—
—
—
Part No. Part No.
5⁄8" x 3⁄4"
I.D.
18080
18081
18082
18083
18084