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Black G1/4 hard-tube fitting with internal nylon insert for 13 mm tubing

Alphacool

Alphacool Eiszapfen PRO 13mm HardTube Fitting G1/4 Deep Black 1017615

SKU CH-A0Y8-X1RTN MPN 1017615

Connects 13 mm PETG hard tube with G1/4 threads and nylon inserts that prevent deformation at 60 °C

  • FeaturesThe new Eiszapfen PRO HardTube fittings from Alphacool are a

Color Black

  • Prevents PETG tube deformation at 60 °C with internal nylon inserts
  • Larger O-ring contact area improves sealing and tube grip
  • Compression seal reinforces tube from inside and outside for secure hold
  • Tested tensile strength over 8 kg stops tube slippage under load
  • Deep black G1/4 fitting designed for 13 mm hard tubing

Alphacool Eiszapfen PRO 13mm HardTube Fitting

The Alphacool Eiszapfen PRO is a G1/4 compression fitting designed for 13mm outer-diameter PETG hard tubing in custom liquid-cooling loops. It addresses the specific risk of tube deformation that can occur when coolant temperatures approach 60 °C. The deep black finish suits colour-coordinated builds. This fitting is not recommended for use with Bitspower brand tubing.

Thermal stability and seal integrity

Internal nylon inserts support the tube wall from the inside, preventing the softening and collapse that PETG can suffer at elevated temperatures. A widened O-ring contact area works with the compression seal to grip the tube from both sides, distributing clamping force more evenly. Alphacool reports tensile testing beyond 8 kg, indicating the tube will not pull free under normal loop pressure or vibration.

Build quality and daily handling

The two-piece brass construction with a matte black coating resists corrosion and fingerprints during assembly. Knurled nuts allow firm hand-tightening without tools, while the deep socket accepts standard G1/4 ports on radiators, blocks and reservoirs. Because the insert remains inside the tube, disassembly and re-routing are straightforward, though the Bitspower compatibility note should be checked before purchase.

Highlights

  • Prevents PETG tube deformation at 60 °C with internal nylon inserts
  • Larger O-ring contact area improves sealing and tube grip
  • Compression seal reinforces tube from inside and outside for secure hold
  • Tested tensile strength over 8 kg stops tube slippage under load
  • Deep black G1/4 fitting designed for 13 mm hard tubing

Specifications

BrandAlphacool
Model1017615
FeaturesThe new Eiszapfen PRO HardTube fittings from Alphacool are a further development of the well-known, previous Eiszapfen.
Part Number1017615

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Questions about this item

How do I install the 13mm HardTube fitting and what step is most often done wrong?

Slide the compression nut, then the nylon insert, onto the cut tube before pushing it fully into the G1/4 body; the common mistake is forgetting the nylon insert, which prevents PETG deformation at 60 °C.

What maintenance or replacement will the fitting need later?

Inspect the O-ring and compression seal periodically; replace either if they show cracking or hardening, and re-torque the nut if any seepage appears.

What limit appears first under sustained load?

PETG tubing can start to deform at 60 °C, so loop temperature is the practical ceiling before the nylon-stabilised joint becomes the weak point.

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