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Black knurled compression fitting for 13mm hard tube with G1/4 thread

Alphacool

Alphacool Eiszapfen 13mm G1/4 HardTube Knurled Compression Fitting Black 1011191

SKU CH-SMVM-9G6T6

Connects 13 mm hard tubing to G1/4 threads with a knurled compression nut and coated finish

  • FeaturesThis connector has a ¼” external screw thread on one side. T

Color Black

  • Secure HardTube connection with 13 mm compression fitting
  • High-flow G1/4 thread for unrestricted coolant circulation
  • Durable matte black coating bonded to resist chipping
  • Knurled nut design for tool-free tightening and firm O-ring seal
  • Includes three coloured O-rings with UV-reactive option

High-end Eiszapfen fitting for 13mm HardTube

The Alphacool Eiszapfen 1011191 is a premium G1/4 compression fitting designed for custom liquid-cooling loops. It connects rigid tubing with a 13mm outer diameter to components using a standard quarter-inch thread. The knurled nut allows secure hand-tightening without tools.

Knurled nut and coloured O-rings included

A slanted nut profile presses the O-ring firmly against the tube for a reliable seal that resists vibration during transport. The package supplies O-rings in three colours, enabling visual coordination or UV-reactive effects. A specialised coating process bonds the black finish to the metal, preventing chipping or peeling over time.

Single fitting for one tube-to-component joint

Each unit provides one connection point, so a typical loop requires multiple fittings for radiators, blocks and reservoirs. Builders using tubing with a different outer diameter or a non-G1/4 port will need alternative connectors. The high-flow internal geometry minimises restriction within the loop.

Highlights

  • Secure HardTube connection with 13 mm compression fitting
  • High-flow G1/4 thread for unrestricted coolant circulation
  • Durable matte black coating bonded to resist chipping
  • Knurled nut design for tool-free tightening and firm O-ring seal
  • Includes three coloured O-rings with UV-reactive option

Specifications

BrandAlphacool
Model1011191
FeaturesThis connector has a ¼” external screw thread on one side. The other side fits HardTubes with an external diameter of 13mm.
Part Number1011191

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Questions about this item

Will the 13 mm O-rings need replacement after long use?

The O-rings seal against the HardTube; they can be swapped if they harden or leak.

What limits the flow rate of the 13 mm Eiszapfen fitting?

The 13 mm inner bore sets the maximum flow; tubing and pump determine the rest.

Does the black coating on the 1011191 fitting resist heat from coolant?

A special process binds the coating to the surface, preventing chipping or peeling.

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