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Black rectangular copper radiator with two G1/4 ports, 278 by 125 by 30 millimetres

Alphacool

Alphacool NexXxos ST30 Full Copper Radiator 240 30mm Black G1/4 (14157)

SKU CH-Y9C3-WEGFZ

Full-copper 240 mm radiator with 30 mm thickness and dual 120 mm fan mounts, 278 × 125 mm, 731 g

  • TypeRadiator

Size 240mm

Struck-through versions exist but are not stocked here.

  • Full-copper construction boosts heat transfer
  • 240 mm dual-fan layout fits standard 120 mm mounts
  • 30 mm slim profile suits tight chassis spaces
  • G1/4 threads allow standard fitting choices
  • 731 g weight keeps loop stress low

240mm Full Copper Radiator

This 240mm radiator uses copper chambers, fins and channels with brass G1/4 threads and steel side panels. It is built for custom-loop builders who want a dense 30mm core that fits two 120mm fans. The all-copper water path aims to raise thermal transfer above mixed-metal designs.

Build Quality and Connections

Weighing 731g, the unit measures 278mm long, 125mm wide and 30mm thick. Two G1/4 ports accept standard compression fittings, letting the loop enter and exit on the same end. Steel side panels protect the copper core while the black finish resists visible corrosion in open-loop coolant.

What the Package Changes

No fans, fittings or mounting hardware are included in the box. Buyers must supply two 120mm fans, appropriate screws and G1/4 fittings to complete the installation. This keeps the SKU focused on the heat exchanger itself and lets the builder choose airflow and aesthetic parts separately.

Highlights

  • Full-copper construction boosts heat transfer
  • 240 mm dual-fan layout fits standard 120 mm mounts
  • 30 mm slim profile suits tight chassis spaces
  • G1/4 threads allow standard fitting choices
  • 731 g weight keeps loop stress low

Specifications

TypeRadiator

Other versions of this model

2 more in the same range

Same family, different memory, cooler or clock — compare before you commit.

Questions about this item

What does the G1/4 thread limit for fittings?

The two G1/4 ports accept any standard G1/4 compression or barb fitting; the thread pitch caps the connection to that single size.

Will the 278 mm by 125 mm footprint clear my case fan mounts?

The radiator measures 278 mm long, 125 mm wide and 30 mm thick, matching dual 120 mm fan holes with 15 mm screw centres.

How do I bleed the separated copper chambers after mounting?

Tilt the case so the ports face up, run the pump at low speed, and gently rock the loop until bubbles stop escaping through the fill port.

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