Reservoir Singularity Computers Protium 100mm Acrylic Frosted Black – Reservoir for Custom Water Cooling

Singularity Computers Protium 100mm Acrylic Frosted Black is a compact cylindrical reservoir designed for custom water-cooling loops in desktop PCs. At 100 mm height, the reservoir provides coolant storage and assists in bleeding trapped air from the loop. The frosted black acrylic finish offers a subdued aesthetic that integrates with various build styles while maintaining compatibility with standard water-cooling fittings and typical vertical mounting orientations.

Advantages

The reservoir's 100 mm size balances space efficiency and coolant capacity, making it suitable for mid- to high-performance systems where chassis space is limited. The acrylic construction provides clear, durable fluid containment with a frosted surface that reduces visible glare and hides minor sediment or flow patterns. Compatibility with common fittings simplifies installation and replacement in existing water-cooling setups.

Suitable for

• Compact custom water-cooling builds requiring a vertical, short reservoir
• High-performance systems where coolant bleeding and reservoir capacity are needed without large footprint
• Modded PCs and show builds seeking a subdued frosted black look
• Systems using standard G1/4 or commonly sized fittings for loop integration

Key specifications

• Form factor: cylindrical vertical reservoir
• Material: acrylic (frosted finish)
• Height: 100 mm
• Mounting orientation: vertical
• Fitting compatibility: standard water-cooling fittings (commonly used sizes)

How to use

Install the reservoir in a vertical orientation using appropriate mounting brackets or clamps compatible with the reservoir diameter and your case. Connect inlet and outlet ports to the loop using standard fittings and tubing, ensuring all connections are tightened to prevent leaks. Fill the reservoir with the selected coolant and perform an initial fill and leak test with the pump running while chassis power is off for system components. Use the reservoir as the primary fill point to introduce coolant and to help purge air from radiators, blocks, and tubing during the bleeding process.

Usage recommendations

Choose coolant and additives that are compatible with acrylic materials and follow manufacturer guidance for fluid maintenance. Periodically inspect fittings and the reservoir body for signs of wear, discoloration, or deposits, and plan routine flushing to maintain loop performance. When mounting in tight cases, check clearance for fittings and tubing to ensure reliable connections and avoid stress on the acrylic body.