We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Black O-ring set for HEATKILLER IV Threadripper cooler

Watercool

Watercool HEATKILLER IV Threadripper O-Ring Set WAT-0194

SKU CH-D3AG-FPNC6

Replacement O-ring set for HEATKILLER IV Threadripper coolers, includes all required seals

  • ColorBlack
  • FeaturesReplacement O-Ring Set for HEATKILLER® IV for Threadripper
  • Complete O-ring kit for full cooler rebuild
  • Fits every HEATKILLER IV Threadripper revision
  • Genuine Watercool replacement parts ensure seal integrity
  • Black elastomer rings resist coolant degradation
  • Single pack contains all required O-rings

Complete seal kit

This replacement O-ring set contains every seal required for a HEATKILLER IV Threadripper water block. It is intended for builders who are reassembling or servicing that specific cooler and need a full refresh of the sealing components in one package.

Consistent sealing over time

The O-rings are made from materials chosen to maintain their elasticity and compression set resistance through repeated thermal cycles. This helps the water block retain a reliable seal during sustained operation without the degradation that can occur with aged or heat-damaged originals.

Threadripper socket compatibility

The set is engineered to match the groove dimensions and channel layout of the HEATKILLER IV cold plate designed for AMD Threadripper processors. Buyers using a different socket or a different water-block series will find that these seals do not fit their hardware.

Highlights

  • Complete O-ring kit for full cooler rebuild
  • Fits every HEATKILLER IV Threadripper revision
  • Genuine Watercool replacement parts ensure seal integrity
  • Black elastomer rings resist coolant degradation
  • Single pack contains all required O-rings

Specifications

BrandWatercool
ModelWAT-0194
Part NumberWAT-0194
ColorBlack
FeaturesReplacement O-Ring Set for HEATKILLER® IV for Threadripper

Questions about this item

Does the O-ring material affect pump noise or heat transfer once the loop is running all day?

The set simply replaces the original seals in the HEATKILLER IV for Threadripper block; it does not change pump noise or thermal performance.

What existing cooler must I already own for this replacement set to work?

You need a Watercool HEATKILLER IV for Threadripper water block; the rings fit every version of that block.

Will these rings fit an older HEATKILLER III Threadripper block I still use?

No, the set is made only for the HEATKILLER IV for Threadripper and is not compatible with earlier HEATKILLER models.

New to this? Which coin should you pay with — what to check, what it costs to pay, and what is never asked for.

Also in this aisle

People compared these

Same shelf, same checkout — eight coins and a 30-minute rate lock.