Computer cooling system part BitsPower BP-MBWP-C21 — Brass, black finish

BitsPower BP-MBWP-C21 is a brass computer cooling system part with a deep black e-plated finish, designed for use in custom water-cooling loops. Built from high-quality brass and finished with corrosion-resistant plating, this component provides durable metal construction and a concealed O-ring seal for reliable leak prevention. The part features a high-flow geometry in a G3/8" threaded form factor and is compatible with specified pump inlet and outlet orientations in custom liquid-cooling assemblies.

Advantages

The brass construction offers strength and corrosion resistance while the e-plated deep black surface provides chemical protection and a consistent aesthetic for black-themed builds. The extreme-flow internal design reduces hydraulic resistance in a G3/8" threaded application, supporting efficient coolant circulation. A hiding O-ring design improves sealing reliability and presents a cleaner exterior appearance compared with visible-mounted seals.

Suitable for

• Custom PC water-cooling loops requiring G3/8" threaded metal fittings
• Replacement or upgrade of fittings on compatible pump inlet and outlet ports
• Enthusiast builds with a black finish or metal hardware preference
• Systems where corrosion resistance and long-term durability are priorities

Key specifications

• Material: high-quality brass
• Finish: deep black e-plated coating
• Thread type: G3/8"
• Flow design: extreme/high-flow internal geometry
• Seal: concealed O-ring sealing design
• Compliance: RoHS compliant

How to use

Install the fitting into the matching G3/8" threaded port of your water-cooling loop or pump inlet/outlet. Ensure the mating thread and port are clean and free of debris, then hand-start the thread to avoid cross-threading before fully tightening with appropriate tools. Verify the concealed O-ring is seated correctly to achieve a watertight seal. After installation, perform a pressure or leak test with coolant or a suitable substitute before powering the PC to confirm there are no leaks.

Recommendations

Use with compatible G3/8" threaded tubing and pump ports, and avoid overtightening to protect threads and O-ring integrity. For long-term corrosion protection, periodically inspect fittings and coolant quality; replace the O-ring if signs of wear are present. Follow standard water-cooling maintenance practices, including regular coolant changes and system inspections.