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Black rubber O-ring 12.6mm x .9mm for Eisblock HDX-3

Alphacool

Alphacool Replacement O-Ring 12.6mm x .9mm for Eisblock HDX-3 (1015751)

SKU CH-AB2J-JPD9S

Replacement O-ring seals the connection terminal on an Alphacool Eisblock HDX-3 water block

  • Product colorBlack
  • Key featuresReplacement O-Ring for the connection terminal of the Alphac
  • Ensures a watertight seal with a 12.6mm x .9mm black O-ring
  • Direct replacement for the Eisblock HDX-3 connection terminal
  • Exact fit prevents coolant leaks at the terminal joint
  • Single replacement ring restores original sealing performance
  • Black elastomer material matches the factory component appearance

Replacement O-Ring for Eisblock HDX-3

This black O-ring seals the connection terminal on the Alphacool Eisblock HDX-3 water block. It measures 12.6mm by .9mm and matches the original factory specification. The part number is 1015751 and the supplier reference is 29942. One ring is included in the package.

When to replace the terminal seal

Swap the ring when the original shows cracking, flattening or coolant weeping at the terminal fitting. A fresh seal restores the leak-free join without removing the block from the loop. The repair is worthwhile whenever the terminal is disturbed for maintenance or fitting changes.

Limits of the static seal

The ring only addresses the terminal interface on the Eisblock HDX-3; it does not seal pump tops, reservoir ports or radiator threads. It cannot compensate for damaged threads or misaligned fittings. Compatibility is limited to the named block model.

How it compares

Measured against everything we stock in PC Cooling Fans, at today’s prices. Recalculated every night.

Price $0.83
Cheaper than about 99% of the 8,339 comparable items (median $19.99).

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Specifications

Product
Brand nameAlphacool
Model name1015751
Part number1015751
Product colorBlack

Questions about this item

What size O-ring fits the connection terminal on the Alphacool Eisblock HDX-3?

The replacement O-ring measures 12.6 mm inner diameter by 0.9 mm cross-section, matching the terminal groove on the Eisblock HDX-3.

How do I install the new O-ring on the Eisblock HDX-3 connection terminal without damaging it?

Remove the old ring, clean the groove thoroughly, then press the new 12.6 mm x 0.9 mm ring evenly into the channel — do not stretch it over sharp thread edges.

When should I replace the O-ring on my Eisblock HDX-3 connection terminal?

Replace it whenever you disassemble the terminal, see flattening, cracking, or coolant weeping past the seal — typically every loop service or annually.

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