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Brass G 1/4in male to female extension coupler 10mm height knurled finish

PrimoChill

PrimoChill G 1/4in 10mm SX Extension Coupler diy cooling

SKU CH-H21A-VMFX0

Extends a G 1/4in fitting by 10mm with a coated-brass male-to-female coupler for clearance

  • TypeCPU Block

Option UV Pink

Show 9 more configurations

Struck-through versions exist but are not stocked here.

  • Adds 10 mm spacing for tight clearance
  • Coated brass resists corrosion in liquid loops
  • G 1/4 in male-to-female thread fits standard fittings
  • Low 15 mm installed height keeps builds compact
  • Includes pre-installed O-ring for leak-free seal

Extension coupler for custom loops

The PrimoChill G 1/4in 10mm SX Extension Coupler adds clearance between a male and a female G 1/4in threaded fitting in a custom water-cooling loop. It is intended for builders who need extra space to route tubing or align components inside a tight chassis. The coated brass body provides corrosion resistance for long-term coolant contact. Buyers who want a rigid angled adapter or a rotary fitting will not find those functions here.

Passive thermal path and zero noise

The coupler is a solid brass component with no moving parts, so it adds no audible noise to the system. Heat transfers through the metal body at the same rate as any standard G 1/4in fitting in the loop. Power draw remains unchanged because the part does not require electricity. The 10mm height without threads and 15mm height with threads keep the added restriction minimal for pump performance.

Included seal simplifies assembly

One installed O-ring on the male threaded side is supplied in the package, so no separate seal purchase is needed for that connection. The female side accepts any standard G 1/4in fitting, allowing the builder to choose the final barb or compression fitting. Candy SX finish tones can vary between knurled and smooth surfaces, which is a cosmetic consideration only.

Highlights

  • Adds 10 mm spacing for tight clearance
  • Coated brass resists corrosion in liquid loops
  • G 1/4 in male-to-female thread fits standard fittings
  • Low 15 mm installed height keeps builds compact
  • Includes pre-installed O-ring for leak-free seal

Specifications

TypeCPU Block

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Questions about this item

How do I install the PrimoChill G 1/4in 10mm SX Extension Coupler without cross-threading the G 1/4in threads?

Hand-tighten the male G 1/4in thread into the component first, using the pre-installed O-ring to seal; then thread your fitting onto the female G 1/4in end. Avoid tools — over-torquing the coated brass strips the fine threads.

Will the O-ring on the male threaded side need replacement, and how often?

The installed O-ring on the male G 1/4in side is the only maintenance item; inspect it during loop drains and replace if it shows flattening, cracking or coolant weep — typically every one to two years in continuous use.

What is the first limit reached when this 15 mm tall coupler is used in a long-term high-flow loop?

The coated brass body handles sustained pressure and temperature far beyond normal loop specs; the practical limit is the single O-ring seal, which will degrade before the coupler material fatigues.

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