AI, high-density computing, cloud workloads, and continuous uptime requirements are pushing modern data centers harder than ever. As rack power density increases, cooling systems need to move more heat away from servers, coolant distribution units, manifolds, and facility-level infrastructure safely and reliably.
That makes hose selection more than a maintenance detail. The right hose can support coolant purity, reduce routing complexity, maintain flow, resist flame exposure, and help protect mission-critical equipment from thermal disruption.
Western Integrated Technologies supports data center operators, OEMs, contractors, and maintenance teams with Parker hose solutions for liquid cooling and fluid conveyance applications. Parker identifies several of these hose families as thermal management products for liquid and electronic cooling in its thermal management literature.
Why Hose Selection Matters in Data Center Cooling
Data center cooling systems may include:
- Direct-to-chip liquid cooling
- Server blade and rack-level cooling loops
- Coolant distribution units, or CDUs
- Rack manifolds
- Rear-door heat exchangers
- Facility water loops
- Glycol and DI water coolant circuits
- Suction and discharge lines
- Coolant transfer assemblies
Each section of the cooling system has different needs. Some areas require compact, highly flexible hose for routing inside or near server racks. Other areas require larger-diameter hose for higher-flow coolant movement between CDUs, manifolds, pumps, and facility systems.
Parker’s data center hose portfolio includes smaller flexible hoses for server and rack-level routing, mid-size coolant transfer hoses, and larger suction/discharge hoses for facility-scale coolant movement.
Practical Guide to Hose Selection for Data Center Cooling Applications
Parker 627 Series Push-Lok Hose
Best suited for coolant transfer in high-performance computers and data centers
Parker 627 Series Push-Lok Hose is designed for transferring coolant in high-performance computers and data farms. It uses a peroxide-cured EPDM tube engineered to improve chemical and temperature resistance while supporting sealing performance in computer and electronics applications.
This hose is a strong fit for general coolant transfer lines where the application requires a durable EPDM hose with a 150 psi maximum working pressure rating and UL94 HB flame resistance.
Where to Use Parker 627 Series Hose in a Data Center
Parker 627 series hose is well suited for:
- Coolant transfer between CDUs and rack manifolds
- Rack-level liquid cooling supply and return lines
- Coolant distribution lines serving high-performance computing equipment
- Media transfer lines for industrial coolant, water, or glycol-based coolant loops
- Data farm cooling circuits where EPDM compatibility and flame resistance are important
Key Features
- Peroxide-cured EPDM tube
- 150 psi maximum working pressure
- 4:1 safety factor
- Temperature range from -40°F to +212°F
- UL94 HB flame resistance rating
- Available sizes from 3/8 in to 1-1/2 in ID
Available Sizes
| Hose inside diameter | Part number |
| 3/8 in | 627-6-RL |
| 1/2 in | 627-8-RL |
| 3/4 in | 627-12-RL |
| 1 in | 627-16-RL |
| 1-1/4 in | 627-20-RL |
| 1-1/2 in | 627-24-RL |
Download Free Parker 627 Series Hose Brochure
Parker 629 Series Server Blade Hose
Best suited for direct-to-chip and server blade cooling
Parker 629 Server Blade Hose is a low-pressure, peroxide-cured EPDM hose designed specifically for compact thermal management systems. Its small outside diameter, tight bend radius, and flexibility make it especially useful where space is limited.
This hose is one of the group’s most rack-focused products. Parker describes the 629 Server Blade Hose as a unique hose designed for direct liquid cooling, with routing capability for direct-to-chip cooling applications.
Where to Use Parker 629 in a Data Center
Parker 629 is well suited for:
- Direct-to-chip liquid cooling lines
- Server blade cooling circuits
- Cold plate supply and return connections
- In-rack coolant routing
- Tight-radius hose runs inside compact server cabinets
- Connections between rack manifolds and liquid-cooled IT hardware
Because of its small OD and flexibility, Parker 629 is ideal for the most space-constrained areas of a data center cooling system. It is especially appropriate near the server hardware itself, where hose routing must avoid sharp bends, obstruction, or unnecessary space claim.
Key Features
- Peroxide-cured EPDM tube for enhanced sealing and fluid purity
- Small OD to minimize space claim
- Designed for flexibility and ease of routing
- Very tight bend radius
- UL94 V-0 flame resistance rated cover
- 150 psi working pressure
- 4:1 safety factor
Available Sizes
| Hose inside diameter | Part number |
| 5.3 mm | 629-3.5-RL |
| 6.4 mm | 629-4-RL |
Download Free Parker 629 Series Hose Brochure
Parker 807 / 807XT Series Push-Lok EPDM Hose
Best suited for thermal management systems with air, water, PCW, and coolant solutions
Parker 807 Push-Lok EPDM-P Hose is a low-pressure, peroxide-cured EPDM synthetic rubber hose designed for thermal management systems. It is intended for transferring air, including dry air; water, including process cooling water; and coolant solutions.
The 807 Series is a versatile option for coolant and water transfer where flexibility, flame resistance, and Push-Lok convenience are important. Parker’s thermal management materials list 807 as a liquid cooling and electronic cooling hose with UL94 V-0 performance.
Where to Use Parker 807 / 807XT in a Data Center
Parker 807 and 807XT are well suited for:
- Rack-level coolant supply and return lines
- Connections to rear-door heat exchangers
- CDU auxiliary coolant circuits
- Process cooling water lines
- Coolant transfer to electronics cooling equipment
- Color-coded supply and return hose assemblies
The available red, blue, and black cover colors can be especially useful in data center environments where visual identification of supply, return, or service lines helps simplify maintenance.
For example:
- Blue hose may be used for chilled or supply coolant lines.
- Red hose may be used for warm or return coolant lines.
- Black hose may be used for general coolant or utility connections.
Color coding should always follow the facility’s own labeling and safety standards.
Key Features
- Peroxide-cured EPDM tube for fluid purity
- Designed for flexibility and routing
- UL94 V-0 flame resistance rated cover
- 150 psi working pressure, with 100 psi rating in size 16
- Compatible with 82 Series fittings
- Available in red, blue, and black
Available Sizes & Colors
| Hose inside diameter | Color | Part number |
| 1/4 in | Red | 807-4-RED-RL |
| 1/4 in | Blue | 807-4-BLU-RL |
| 1/4 in | Black | 807-4-BLK-RL |
| 3/8 in | Red | 807-6-RED-RL |
| 3/8 in | Blue | 807-6-BLU-RL |
| 3/8 in | Black | 807-6-BLK-RL |
| 3/8 in | Red | 807XT-6-RED-RL |
| 3/8 in | Blue | 807XT-6-BLU-RL |
| 3/8 in | Black | 807XT-6-BLK-RL |
| 1/2 in | Red | 807-8-RED-RL |
| 1/2 in | Blue | 807-8-BLU-RL |
| 1/2 in | Black | 807-8-BLK-RL |
| 5/8 in | Red | 807-10-RED-RL |
| 5/8 in | Blue | 807-10-BLU-RL |
| 5/8 in | Black | 807-10-BLK-RL |
| 3/4 in | Red | 807-12-RED-RL |
| 3/4 in | Blue | 807-12-BLU-RL |
| 3/4 in | Black | 807-12-BLK-RL |
| 1 in | Red | 807-16-RED-RL |
| 1 in | Blue | 807-16-BLU-RL |
| 1 in | Black | 807-16-BLK-RL |
Download Free Parker 807 Series Hose Brochure
Parker E-Z Form EPDM-P Hose, Series 7390
Best suited for larger coolant lines with tight bend requirements
Parker Series 7390 E-Z Form EPDM-P Hose is designed for extreme bends and kink-free performance while maintaining full-flow capability. It uses a peroxide-cured EPDM tube, multiple textile braids or plies, and a wire helix for suction capability and durability.
This hose is especially useful when larger coolant lines need to be routed around equipment, pumps, CDUs, skids, or mechanical room infrastructure without kinking.
Where to Use Parker 7390 in a Data Center
Parker 7390 is well suited for:
- CDU inlet and outlet hose assemblies
- Coolant supply and return lines around mechanical skids
- Facility coolant loop connections
- Pump suction or discharge lines where flexibility is needed
- DI water and glycol-based coolant solution transfer
- Large-diameter hose runs where tight routing is required
- Connections between CDUs, manifolds, and larger distribution piping
The 7390 Series is a good choice when the hose must handle larger flow requirements but still bend around equipment without kinking. This makes it valuable in mechanical spaces, row-level cooling zones, and CDU piping areas where rigid pipe alone may not offer enough installation flexibility.
Key Features
- Peroxide-cured EPDM tube
- Multiple textile braids or plies with wire helix
- Full suction capability
- 150 psi maximum working pressure
- 29 in-Hg vacuum pressure rating
- Temperature range from -40°F to +212°F
- UL94 V-0 flame resistance rating
- Compatible with EZ Series fittings
- Available in 1-1/4 in to 3 in ID
Available Sizes
| Hose inside diameter | Color / layline | Part number |
| 1-1/4 in | Black with blue layline | 7390-1250100-BLYL |
| 1-1/4 in | Black with red layline | 7390-1250100-RLYL |
| 1-1/2 in | Black with blue layline | 7390-1500100-BLYL |
| 1-1/2 in | Black with red layline | 7390-1500100-RLYL |
| 2 in | Black with blue layline | 7390-2000100-BLYL |
| 2 in | Black with red layline | 7390-2000100-RLYL |
| 3 in | Black with blue layline | 7390-3000100-BLYL |
| 3 in | Black with red layline | 7390-3000100-RLYL |
Download Free Parker 7390 Series Hose Brochure
Parker 7391 EPDM-P Suction & Discharge Hose
Best suited for larger-scale data centers, CDUs, and facility applications
Parker 7391 EPDM-P Suction & Discharge Hose is designed for larger-scale data centers, coolant distribution units, and facility applications. It is available in 2 in, 3 in, and 4 in sizes, making it suitable for higher-flow coolant movement where maximum flexibility is less important than flow capacity and dependable performance.
The hose is built with a peroxide-cured EPDM tube, multiple textile plies, and a wire helix. It also uses halogen-free materials and is rated for UL94 V-0 flame resistance.
Where to Use Parker 7391 in a Data Center
Parker 7391 is well suited for:
- Main coolant supply and return lines
- Large CDU suction and discharge connections
- Facility-level coolant distribution
- Mechanical room hose assemblies
- High-flow DI water and glycol coolant lines
- Connections between pumps, CDUs, heat exchangers, and larger distribution headers
- Larger-scale data center cooling infrastructure
This is the hose to consider when the application requires greater flow capacity in 2 in, 3 in, or 4 in hose sizes. Compared with smaller rack-level hoses, 7391 is better positioned for the infrastructure side of the data center cooling system.
Key Features
- Peroxide-cured EPDM tube
- Multiple textile plies with wire helix
- Smooth wrapped synthetic rubber cover
- 150 psi maximum operating pressure
- 28 in-Hg vacuum pressure rating
- Temperature range from -40°F to +212°F
- UL94 V-0 flame resistance
- Designed for water and coolants
- Compatible with EZ Series fittings
- Available in 2 in, 3 in, and 4 in ID
Available Sizes
| Hose inside diameter | Part number |
| 2 in | 7391-2000100 |
| 3 in | 7391-3000100 |
| 4 in | 7391-4000100 |
Quick Selection Guide: Where Each Hose Fits
| Parker hose series | Best data center location | Typical use |
| 627 Series Push-Lok Hose | CDU-to-manifold and rack-level coolant transfer | General coolant transfer in high-performance computers and data farms |
| 629 Server Blade Hose | Inside racks, server blades, direct-to-chip cooling | Compact, flexible hose routing near cold plates and liquid-cooled electronics |
| 807 / 807XT Push-Lok EPDM Hose | Rack-level and equipment-level coolant circuits | Air, water, PCW, and coolant transfer; color-coded supply and return lines |
| 7390 E-Z Form EPDM-P Hose | CDU areas, mechanical skids, larger routed coolant lines | Larger coolant lines requiring tight bends and kink resistance |
| 7391 EPDM-P Suction & Discharge Hose | Facility-level infrastructure and large CDU connections | High-flow suction and discharge coolant lines in larger data centers |
Choosing the Right Hose for Your Cooling System
When selecting a hose for data center cooling, consider:
- Coolant type, including DI water, glycol mixtures, PCW, or industrial coolants
- Hose inside diameter and required flow rate
- Working pressure and safety factor
- Temperature range
- Bend radius and routing constraints
- Flame resistance requirements
- Hose flexibility near IT equipment
- Fitting compatibility
- Whether the hose will be used inside the rack, between racks, at the CDU, or in the mechanical room
Small-diameter hoses like Parker 629 are best suited for direct-to-chip and server-level cooling. Mid-size hoses like Parker 627 and 807 are practical for coolant transfer and rack-level distribution. Larger hoses like Parker 7390 and 7391 are better suited for CDUs, manifolds, mechanical rooms, and facility coolant distribution.
Partner with Western Integrated Technologies
Western Integrated Technologies supports industrial and mobile customers with hydraulic, pneumatic, automation, and fluid conveyance solutions. For data center cooling applications, WIT can help identify the right Parker hose, fittings, and assemblies for your system requirements.
Whether you are building a new liquid-cooled data center, upgrading an existing cooling loop, supporting AI infrastructure, or maintaining CDU and manifold connections, our team can help you evaluate the right hose for the right location.
Need help selecting a Parker hose for a data center cooling application? Contact Western Integrated Technologies to discuss hose assemblies, kitting, production support, and fluid conveyance solutions for your project.
