
Best selling Water cooling reservoirs
Here’s a ranking of the best selling Water cooling reservoirs. To give you a quick overview, we’ve added the most important information about each product. This page always stays fresh and updates automatically.
1. Watercool Heatkiller Tube 200 D5 Attachment-AGB
The Heatkiller Tube 200 D5 Adapter AGB from Watercool is a high-quality expansion tank for water cooling systems, distinguished by its modular design and the use of borosilicate glass. This material offers high chemical and thermal resistance, making the tank particularly durable and scratch-resistant. The large filling opening and practical bayonet lock allow for easy and tool-free refilling of the cooling medium. With a filling volume of 500 milliliters and a thoughtful design, the Heatkiller Tube 200 is not only functional but also maintenance-friendly, as it requires less frequent refilling. The various length options and compatibility with D5 and DDC pumps make it a flexible solution for different space conditions in computer cases.
- Modular design for easy adjustments
- Borosilicate glass for high chemical and thermal resistance
- Tool-free refilling thanks to large filling opening and bayonet lock
- Compatible with D5 and DDC pumps for versatile applications.

2. Alphacool Aurora D5 Acetal/Glass Ice Bucket - 150mm incl. VPP Apex D5
The Alphacool Eisbecher Aurora D5 is a high-quality reservoir for water cooling systems that meets both functional and aesthetic demands. Featuring an integrated pump top specifically designed for powerful D5 pumps, this reservoir provides an efficient solution for cooling PC components. The combination of robust glass and acetal gives the product an elegant appearance, while the 12 digitally addressable RGB LEDs in the pump top create impressive lighting. These LEDs are strategically placed to optimally illuminate the glass tube and, along with the Lighttower water effect, create a unique ambiance. The Eisbecher Aurora D5 also offers versatile mounting options, allowing for flexible integration into various case configurations. Whether at the bottom of the case or in fan locations, installation is simple and customizable.
- Integrated pump top for D5 pumps
- High-quality materials: glass and acetal
- 12 digitally addressable RGB LEDs for brilliant lighting
- Versatile mounting options with stand feet and mounting frame
- Lighttower water effect for a unique ambiance.

Alphacool Aurora D5 Acetal/Glass Ice Bucket - 150mm incl. VPP Apex D5
3. Alphacool Alpha Core 100 Aurora Reservoir w. VPP 1019163
The Alphacool Core 100 Aurora Reservoir with VPP Pump is a highly advanced expansion tank specifically designed for water cooling systems. It combines a powerful VPP Apex pump with a modular and aesthetically pleasing design. The reservoir is made from high-quality materials such as acrylic and acetal, which not only provide an appealing look but also enhance durability and functionality. With a filling volume of 200 ml, it offers ample space for coolant, optimizing heat transfer within the system. The integrated RGB lighting with 12 digitally addressable LEDs allows for personalized lighting customization to enhance the overall appearance of the system. Installation is straightforward thanks to the included frame and can be done at various fan locations in the case or on the radiator. The Alphacool Core 100 Aurora is therefore an ideal choice for anyone who values performance and design in their water cooling system.
- Modular expansion tank made from high-quality materials
- Includes a powerful VPP Apex pump
- Compatible with D5 and VPP pumps
- Three G1/4-inch threads for optimal customization
- Integrated RGB lighting with 12 addressable LEDs.

4. Watercool Heatkiller Tube - Basic AGB Mounting Kit
The use of the bracket is incredibly simple. You simply slide the bracket onto the struts to the desired position and then secure it using the countersunk screws attached to the side. On the back of the bracket, there are M4 threads that allow the bracket to be screwed onto the housing wall. Vibration-dampening mounting is also possible, as decoupling modules are included in the package. Additionally, with optionally available adapters, the expansion tank can be mounted to mounting holes for fans in the sizes of 120 x 120 mm or 140 x 140 mm. This allows the expansion tank to be mounted, for example, to a radiator from the HTSF2 series. An adapter for mounting the expansion tank to a radiator from the MO-RA3 series is also available. Technical specifications: Material: POM (Acetal), Color: black. Delivery includes: 1x HEATKILLER® Tube - Basic Mounting Kit, mounting materials.

5. Singularity Computers Protium expansion tank 200mm - acrylic
Balance tank from Singularity Computers with a raw height of 200 mm. The tank, lid, and bottom are made of transparent acrylic and offer flexible mounting options in silver.

6. Aqua Computer ULTITUBE D5 100 PRO expansion tank for D5 pumps
The ULTITUBE D5 100 PRO expansion tank from Aqua Computer is a high-quality solution for water cooling systems, specifically designed for D5 pumps. This expansion tank features a robust borosilicate glass tube that offers high hardness and scratch resistance. Compared to traditional acrylic tubes, borosilicate glass is less susceptible to thermal expansion and provides excellent chemical and thermal resistance. The black anodized aluminum rings that secure the glass tube at both ends ensure a durable connection, while the sturdy acetal base and lid allow for easy assembly and disassembly. An integrated stainless steel wire mesh filter element effectively removes particles and air bubbles from the coolant. The PRO version also includes a gas exchange membrane that compensates for temperature changes, thereby enhancing the efficiency of the cooling system.
- Borosilicate glass for high scratch resistance and chemical resistance
- Integrated filter element for effective particle and air bubble separation
- Anodized aluminum rings for a durable connection
- Gas exchange membrane for temperature regulation.

7. Singularity Computers Protium Triple Port Cap, cap for expansion tank - acetal
The Protium Reservoir Triple Port Reservoir Cap can be used both as a replacement part and to expand existing Protium products. The attachment is compatible with all Protium expansion tanks and Protium pump/reservoir combos from Singularity Computers.
The tube attachment is made from black acetal, making it particularly stable and durable. The Protium Reservoir Triple Port Reservoir Cap can be used as a lid and/or bottom of an expansion tank. The attachment provides three G1/4-inch threads that can serve as inlet, outlet, and fill or drain ports.
Technical details:
- Material: Acetal
- Color: Black
- Connections: 3x G1/4-inch
- Compatibility: Protium D5/Reservoir Combo, Protium Reservoirs.

Singularity Computers Protium Triple Port Cap, cap for expansion tank - acetal
8. Aqua Computer ULTITUBE D5 200 PRO expansion tank with D5 NEXT pump
The AGB from Aqua Computer in the Pro version features a D5-NEXT pump made of durable borosilicate glass with a capacity of 470 ml. It includes a stainless steel filter and a pressure equalization membrane, as well as mounts for floor or wall installation and RGBpx lighting.

Aqua Computer ULTITUBE D5 200 PRO expansion tank with D5 NEXT pump
9. Watercool Heatkiller Tube 100 DDC Attachment-AGB
The Watercool Heatkiller Tube 100 DDC is a highly advanced reservoir specifically designed for custom water cooling in PCs. With a capacity of 250 ml, this modular reservoir provides ample space for coolant and is made from high-quality materials that ensure excellent craftsmanship. Installation is straightforward, and the reservoir can be easily filled. The reservoir is equipped with two G1/4-inch connections and features an innovative anti-cyclone insert that optimizes flow and minimizes turbulence. Thanks to the pump adapter, the Heatkiller Tube 100 DDC can be directly mounted onto a DDC pump, facilitating integration into existing systems. The use of borosilicate glass ensures high scratch resistance and chemical durability, while the top and bottom are made from sturdy POM. These features make the Heatkiller Tube 100 DDC an ideal choice for demanding water cooling solutions.
- Modular reservoir made of borosilicate glass
- Flow-optimized pump chamber for DDC pumps
- Reduced turbulence thanks to anti-cyclone insert
- High adaptability through practical accessories
- Durable materials for low-maintenance operation.

10. Alphacool 15310 Computer cooling system part/accessories tube
The Alphacool computer cooling system component, designed as a replacement riser tube for the Ice Tower 150, offers a reliable solution for water cooling systems. With a height of 71 mm and precision craftsmanship from PLEXIGLASS, this product ensures optimal functionality and durability. It has been specifically developed for use in liquid cooling systems and contributes to the efficiency and performance of the entire cooling system. The use of high-quality material ensures that the riser tube is not only stable but also aesthetically pleasing. This accessory is an essential component for anyone looking to keep their water cooling systems up to date.
- Replacement riser tube for Alphacool Ice Tower 150
- Made from high-quality PLEXIGLASS for durability
- Optimal height of 71 mm for efficient cooling performance.

Alphacool 15310 Computer cooling system part/accessories tube