Bykski G 1/4 Dual Female Straight Coupler White

G 1/4 Female Coupler for Custom Loops

The Bykski G 1/4 Dual Female Straight Coupler connects two male-threaded fittings in a custom liquid-cooling loop. Its G 1/4in. thread matches the industry-standard size used by most water-blocks, radiators and reservoirs. The diamond-knurled body allows a secure grip when tightening by hand or with light tools. It is built from brass and intended for non-aluminium loops only.

Compact 15 mm by 18 mm Body for Tight Corners

The coupler measures 15 mm in height and 18 mm in width, letting it sit in confined spaces where a standard rotary fitting would not fit. This short length keeps tubing runs clean and reduces the number of bends required in dense builds. The straight-through bore adds minimal flow restriction, so pump headroom is preserved. It cannot bridge different thread sizes or adapt to compression fittings without additional parts.

Brass Construction Demands Non-Aluminium Coolant

The all-brass construction means the coupler must only be used in loops that contain no aluminium components, otherwise galvanic corrosion will occur. One unit is included in the package, ready to join two male G 1/4 fittings directly. Builders planning mixed-metal loops or needing a gender change to a different thread standard will need a separate adapter. No seals or O-rings are supplied beyond those already on the mating fittings.