WACH-479
(0)
Alternative top from Watercool, compatible with Heatkiller Tube reservoir, 2x G1/4 inch threads, 10 cm riser tube included
Reservoirs for Custom Water Cooling
Reservoirs are the backbone of any custom water-cooling loop – managing pressure, simplifying filling, and ensuring stable flow. But they’re more than just practical – they add visual flair to your build. Whether cylindrical, flat-mounted, or RGB-lit, there's a reservoir to match your system. Discover the perfect reservoir for your loop today!
139 Results
WABW-025
(0)
Bracket for expansion tank, for attachment to the radiator fan, suitable for 120 mm width
WAZU-736
(0)
Practical fan adapter from Watercool, for Heatkiller Tube expansion tank, for mounting on 140 mm fan slots
WAAU-201
(0)
Aqualis ECO series for aquacomputer pump adapter with 150 ml filling volume with G1 / 4 port
WAAU-202
(0)
Reservoir by aqua computer made from borosilicate glass with 150 ml capacity and LED installation option.
WAAU-620
(0)
Replacement tube by aqua computer, 100 mm length, for ULTITUBE reservoirs, made of borosilicate glass
WAZU-1004
(0)
Slot cover with housing passage, for aqua computer LEAKSHIELD pump systems, 1x G1/4 connection, cable routing, made of stainless steel and acetal
WAZU-863
(1)
Terms and conditions for Watercool Heatkiller Tube, fan opening 120 mm, including vibration dampening, Black
WAAU-621
(0)
Replacement tube by aqua computer, 150 mm length, for ULTITUBE reservoirs, made of borosilicate glass
WAAU-118
(1)
Aqua Computer is one of the leading manufacturers of high quality watercooling components from German production
WAAU-626
(0)
Bitspower expansion tank, with a 150 mm tube height, made of transparent acrylic, including aluminium bracket for radiator mounting, including pressure equalization membrane, 3x G1/4 inch ports
WAAU-474
(0)
High-quality reservoir of the ECO series for aqua computer pump adapters with 880 ml filling volume with G1/4 connection.
WAAU-622
(0)
Replacement tube by aqua computer, 200mm length, for ULTITUBE reservoirs, made of borosilicate glass
WAZU-864
(0)
Terms and conditions for Watercool Heatkiller Tube, fan hole 140 mm, including vibration dampening, Black
WAZU-735
(1)
Practical fan adapter from Watercool, for Heatkiller Tube expansion tank, for mounting on 120mm fan slots.
WAAU-432
(0)
Modular reservoir from Watercool, container made of borosilicate glass, 250 ml capacity, 2x G1/4 inch connection, with black aluminium struts
Water Cooling Reservoirs: Stability, Control, and Style for Your Loop
Reservoirs play a vital role in your custom water-cooling loop – making filling, bleeding, and pressure balancing simple and effective. They ensure consistent coolant flow while giving your system a visual centrepiece. Whether subtle or bold, every well-built loop starts with the right reservoir.
Designed for Every Loop and Layout
From cylindrical tanks to flat distro plates, water cooling reservoirs come in a wide variety of shapes and mounting styles. Many feature multiple G1/4-inch ports, fill level indicators, integrated lighting, or pump combos. This allows you to customise both function and aesthetics – down to the last detail.
The Central Element of Custom Water Cooling
Working in tandem with your radiator, blocks, and pump, the reservoir forms the heart of your cooling loop. A smartly placed reservoir improves system efficiency, simplifies maintenance, and often becomes the visual highlight of your build – especially in open or showcase cases.
Built for Enthusiasts and Visual Perfectionists
Whether you're chasing peak thermal performance or crafting a clean, beautiful rig – a cooling reservoir gives your loop clarity and control. Crafted from clear acrylic, glass, or frosted materials, many reservoirs support coloured or lit coolant for that extra visual impact.
Find Your Ideal Reservoir
Discover your water cooling reservoir at Caseking – for better control, smoother loops, and stunning visuals in every custom PC build.
Frequently Asked Questions About Water Cooling Reservoirs
- What is a reservoir in a custom water-cooling loop?
- A reservoir is a core component in a custom loop. It helps with filling the system, bleeding air from the lines, and maintaining pressure balance. It also keeps the coolant level stable and adds visual appeal to your setup.
- What types of reservoirs are available?
- You can choose from cylindrical reservoirs, flat tanks, distro plates with integrated channels, or pump-reservoir combos. Each type offers unique mounting and design flexibility, depending on your case and layout.
- How do I mount a reservoir?
- Most reservoirs can be mounted vertically or horizontally using brackets, often on pump bases or directly on radiators. Many models include universal mounting kits to fit various cases and configurations.
- Is the material important?
- Yes – acrylic is crystal-clear and easy to shape, while borosilicate glass is more durable and scratch-resistant. Aluminium is less common due to potential corrosion if used with certain coolants or mixed metals.
- Why choose an illuminated reservoir?
- An RGB or LED-lit reservoir enhances your system's appearance and improves visibility of the coolant level. Paired with coloured fluids, it becomes a striking centrepiece – especially in open builds or showcase systems.