Computer cooling system accessory Alphacool 15257 — brass and rubber parts, black

Alphacool 15257 is a black-finished accessory for PC liquid-cooling systems, manufactured from brass and rubber. It is intended for integration into water-cooling loops and cooling assemblies where durable metal construction combines with flexible rubber elements to provide reliable sealing and vibration isolation. The product is used during maintenance, upgrades, and component replacement to improve handling of fittings and connections in custom and closed-loop cooling setups.

Advantages

The brass components offer corrosion-resistant mechanical strength while the rubber parts provide flexible sealing and dampening to reduce the risk of leaks and vibration transfer. The compact form factor and black finish allow discreet installation within a variety of chassis and cooling configurations. The included Pumpin Gum Ball function facilitates removal of residual coolant by creating pressure and pumping out liquid from hard-to-reach areas, simplifying fluid changes and system preparation.

Suitable for

• Custom water-cooling loops in desktop PCs
• Routine coolant replacement and system maintenance
• Installation where vibration isolation of fittings is required
• Integration into cooling assemblies during upgrades or component swaps

Key specifications

• Materials: brass and rubber
• Finish: black
• Connection detail: one side with 1/4" internal screw thread for attachment
• Functionality: sealing, vibration isolation, and fluid-removal assistance via Pumpin Gum Ball

How to use

Install the accessory at an accessible point in the cooling loop by attaching the 1/4" internal threaded side to a compatible fitting or by temporarily removing a connection to split circulation. Use the rubber elements to ensure a tight seal and to reduce vibration transfer between metal parts. To remove residual coolant, connect the Pumpin Gum Ball to a fillport or the exposed connection, then apply gentle pressure to create flow and pump droplets out of system corners until the desired level of fluid removal is achieved.

Usage recommendations

Before installation or fluid removal, power down the PC and follow standard safety practices: allow components to cool, drain remaining liquid into a suitable container, and wear protective gloves. Verify thread compatibility and inspect rubber seals for wear; replace seals if they show signs of aging to maintain leak-free operation.