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Alphacool G1/4 inch 20mm male-female extension fitting deep black finish

Alphacool

Alphacool G1/4" HF 20mm Male-Female Extension Deep Black 17221

SKU CH-ZQTW-MTW0X

A G1/4" high-flow extension fitting that adds 20 mm of fixed length between components in a custom water-cooling loop

  • TypeFittings

Color Black

  • High-flow inner diameter for unrestricted coolant flow
  • 20 mm extension adds clearance in tight routing
  • Deep Black chromatised finish resists peeling and fading
  • Fixed male-to-female orientation locks tubing direction
  • Brass body with bonded surface ensures lasting colour integrity

Alphacool G1/4" HF 20mm Extension

This Alphacool G1/4" high-flow extension fitting adds 20mm of fixed length between components in a custom water-cooling loop. The Deep Black chromatised finish bonds permanently to the brass body to resist peeling. It suits builders who need precise spacing without rotational movement. The male-to-female G1/4" thread connects standard fittings securely.

Deep Black chromatised finish

The package includes one extension fitting in Deep Black, matching Alphacool's Chrome and Shiny Copper colour options for a coordinated look. The high-flow inner diameter maintains unrestricted coolant passage through the rigid 20mm spacer. Because the fitting does not revolve, it locks tubing angles in place for clean, predictable routing. The chromatising process fuses the colour layer to the metal for long-term durability.

Builders needing fixed offset spacing

This fitting serves loops where a rigid, non-rotating 20mm gap is required between a block, radiator or reservoir and the next fitting. It is not suited for connections that need angular adjustment or swivel alignment after tightening. Users wanting a rotating coupler or a different length should look at alternative fitting types. The single G1/4" thread size limits use to compatible components only.

Highlights

  • High-flow inner diameter for unrestricted coolant flow
  • 20 mm extension adds clearance in tight routing
  • Deep Black chromatised finish resists peeling and fading
  • Fixed male-to-female orientation locks tubing direction
  • Brass body with bonded surface ensures lasting colour integrity

Specifications

TypeFittings

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Questions about this item

Will the Deep Black finish on this 20 mm extension wear off after repeated loop maintenance?

The chromatised surface is bonded to the brass body during manufacturing, so the Deep Black colour remains intact even when the fitting is removed and reinstalled.

What restricts flow first when this male-to-female adapter is used in a high-flow loop?

The fixed 20 mm length adds minimal restriction; the loop’s narrowest component — typically a water-block or radiator port — will limit flow before this extension does.

Does the brass body of this non-rotatable 17221 extension transfer noticeable heat into the coolant during all-day operation?

Brass conducts heat well, but the fitting’s small mass and direct coolant contact mean it quickly reaches fluid temperature without adding measurable heat to the loop.

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