Bykski Stainless Steel UQD Quick-Release Shut-Off Coupling, Self-Sealing G1/4 Water-Cooling Disconnect (CC-UQD2-X / UQD4D-X / UQD4-X / UQD6-X)

Bykski Stainless Steel UQD Quick-Release Shut-Off Coupling, Self-Sealing G1/4 Water-Cooling Disconnect (CC-UQD2-X / UQD4D-X / UQD4-X / UQD6-X)

TL;DR: This Bykski coupling is a two-way Universal Quick Disconnect built from stainless steel for custom water-cooling and data-center liquid loops. Each set consists of a male plug and a female socket that mate without tools and both sides are self-sealing, so the loop can be opened mid-loop for service...

Common Applications

This Bykski coupling is a two-way Universal Quick Disconnect built from stainless steel for custom water-cooling and data-center liquid loops. Each set consists of a male plug and a female socket that mate without tools and both sides are self-sealing, so the loop can be opened mid-loop for service or hot-swap without draining the reservoir. The four SKUs share the same UQD interface but differ by port size: UQD2 for compact loops, UQD4 and UQD4D for standard G1/4 PC builds, and UQD6 for higher-flow server rack manifolds. Fluid stays unobstructed within the rated working pressure while connected.

Frequently Asked Questions

Q: What is the difference between the CC-UQD2-X, UQD4-X, UQD4D-X, and UQD6-X?

A: They share the same UQD self-sealing quick-release mechanism but differ in port size class. UQD2 is the smallest body, UQD4 and UQD4D are mid-size with G1/4 threading common to PC builds, and UQD6 is the largest for higher-flow server applications.

Q: Will the coupling leak when disconnected?

A: No. Both the male plug and female socket are spring-loaded and self-sealing, so neither side drips when separated. A small residual film on the mating face is normal.

Q: Is the body stainless steel throughout?

A: Yes. The wetted body is stainless steel, which is why these are rated for server and data-center liquid-cooling deployments in addition to PC loops.

Q: Can I mix one Bykski half with a CPC or other UQD half?

A: They follow the OCP UQD form factor but Bykski only validates pairing with its own halves. Mixing vendors is not officially supported.

Q: Does it ship as a male/female pair or single side?

A: Each listing variant ships as a complete coupling: one male plug and one female socket. Buy the size that matches your loop port spec.