Alphacool
Alphacool ES Reservoir 4U - Single for Rendermaster
Best reservoir for professional 4U server and workstation liquid cooling builds.
The Alphacool ES Reservoir 4U is an enterprise-grade component engineered for demanding water cooling setups in 4U server or workstation enclosures. It offers a substantial 300ml liquid capacity, minimizing maintenance needs. Constructed from durable PMMA with 9mm thick transparent acrylic panels, it allows for easy visual fluid monitoring. Integrated blue LED strips enhance visibility of the fluid level. Featuring five G1/4 threads, three of which utilize Alphacool’s patented flush-fitting system, this reservoir provides robust connectivity and flexible installation for high-performance professional environments.
$62.95
Owner Satisfaction
4.6
/ 5
Category Rank
632
/ 3605
#632 in Computer System Cooling Parts
Price vs Category Average
-58%
Below average
Dimensions (L x W x H)
10.57.58.2
/ x x cm
Who it's for
- System integrators building professional 19-inch rack-mount server solutions
- IT administrators managing high-performance computing environments requiring 24/7 reliability
- Maintenance technicians needing quick access to cooling loops without chassis removal
Who should skip it
- Budget-conscious builders seeking cost-effective cooling solutions for personal rigs
- PC enthusiasts prioritizing custom loop aesthetics and visible coolant displays
- Desktop users attempting to fit components into standard consumer PC cases
Performance breakdown
Server Integration
Form factor perfectly tailored for tight 4U rackmount environments.
Fluid Capacity
Substantial 300ml volume significantly reduces the frequency of system maintenance.
Build Durability
Thick 9mm acrylic panels provide industrial-grade resilience for professional workstations.
Connectivity Versatility
Five G1/4 ports offer exceptional flexibility for complex loop configurations.
Visual Monitoring
Integrated blue LEDs make fluid level checks effortless in dark enclosures.
Pump Compatibility
Limited to DC-LT series pumps, restricting broader custom loop options.
Key Specs
Dimensions (L x W x H)
10.5 x 7.5 x 8.2cm
Filling Capacity
300ml
Connections
5x G1/4 inner threads
Weight
500g
Case Material
PMMA with 9mm Acrylic panels
LED Lighting
2 strips with 6 blue LEDs each
LED Connector
3-Pin
Pump Compatibility
For DC-LT
Features
- Optimized for 4U server enclosures
- High 300ml liquid capacity
- Robust PMMA and thick acrylic construction
- Blue LED strips for filling level indication
- Five G1/4 ports for extensive connectivity
- Patented system allows fittings to sit flush
- Flexible M3 screw mounting options
- Does not include a preinstalled pump
What customers say
Professional builders highly value the Alphacool ES Reservoir for its exceptional build quality and specialized design. Users consistently praise the robust construction and industrial aesthetic, noting how perfectly it integrates into server and workstation rack setups. The 4U form factor directly addresses significant mounting challenges in high-density computing environments. When combined with the Rendermaster pump, this reservoir delivers reliable performance and excellent flow dynamics crucial for stability during heavy, prolonged operations like rendering. While the specialized nature commands a premium price, the target audience finds the cost justified by the uncompromising quality and convenience of the rack mount solution. It is recognized as a top-tier, purpose-built component excelling in professional applications.
Know before you buy
No, this reservoir does not come with a preinstalled pump. It is specifically designed to be compatible with Alphacool DC-LT series pumps.
This unit is specifically engineered for 4U server or workstation enclosures. While it may physically fit in some large desktop cases, its mounting system and dimensions are optimized for rackmount environments.
The patented flush-fitting system allows your connectors to sit perfectly level with the reservoir surface. This is particularly useful in the tight, space-constrained interiors of 4U server chassis where every millimeter of clearance matters.
The reservoir is constructed from 9mm thick transparent acrylic, allowing for clear visual inspection. Additionally, it features two integrated blue LED strips that illuminate the fluid, making it easy to check levels even in low-light server environments.
Yes, all five ports use standard G1/4 inner threads, providing significant flexibility for your loop configuration. Three of these ports feature the specialized flush-fitting design, while the others offer standard connectivity.
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Ask Hayley anything about this product before you decide.
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$63