Radiator EK Water Blocks Brass Copper Stainless Steel White 130x300x44mm

The EK Water Blocks 3831109839188 radiator is a 130 x 300 x 44 mm EK-Quantum Surface P series X-Flow radiator designed for custom PC liquid cooling loops. It combines brass, copper and stainless-steel construction with an extruded-aluminum end cap design and a semi-matte white finish on the side plates. The radiator core uses sixteen 2 mm copper tubes and non-louvered copper fins with an 18 FPI density to balance thermal transfer and airflow resistance, while eight G1/4" threaded ports (four on each end) provide flexible crossflow routing and multiple inlet/outlet configurations. The 44 mm thickness provides effective cooling across a wide fan speed range and supports standard 120 mm fans with 25 mm thickness.

Advantages

The Surface P core delivers up to 10% improved thermal performance compared with the previous generation through an optimized fin structure and enhanced core design. Low flow restriction of the internal tube routing reduces pump load and allows multiple radiators on a single pump. High-quality materials and mechanical design ensure rigidity and compatibility with case-mounted 120 mm fan configurations. The modular X-Flow multiport design and EK-Matrix7 compatibility simplify clean tube runs and system expansion, while included hardware offers straightforward mounting and fan installation.

Suitable for

• Custom PC liquid cooling loops in mid-tower and full-tower cases
• Multi-radiator cooling setups where low flow restriction is required
• Systems using standard 120 mm fans (25 mm thick) in push, pull or push/pull configurations
• PC builders and modders who require modular, paintable radiators and easy disassembly

Key specifications

• Dimensions: 130 mm (W) x 300 mm (D) x 44 mm (H)
• Core composition: copper tubes and copper fins
• Tubes: 16 copper tubes, 2 mm width each
• Fin density: 18 FPI (fins per inch)
• End caps: extruded aluminum with contrasting silver finish
• Side plates: stainless steel with semi-matte white coating
• Surface finish on fins: black matte coating with high thermal conductivity
• Ports: eight G1/4" threaded connection ports (four per end) supporting crossflow routing
• Fan compatibility: 120 mm fans, 25 mm thickness (supports push, pull, push/pull)
• Included mounting hardware: M4 Philips screws for fan and case mounting; hex keys for assembly

How to use

Install the radiator in your case in a location that allows adequate airflow and fits the 130 x 300 x 44 mm footprint. Configure the desired inlet and outlet routing using the G1/4" ports on either end; the X-Flow layout supports multiple tube routing options to suit your loop layout. Mount standard 120 mm fans (25 mm thickness) using the supplied M4 screws and choose push, pull, or push/pull configurations depending on available space and desired thermal performance. Ensure all fittings and connections are tightened to G1/4" standards and check for leaks before filling the loop with coolant. When adding multiple radiators, consider pump capacity — the radiator's low flow restriction allows use with common D5 or DDC pumps.

Recommendations

For optimal thermal results, pair the radiator with medium- to low-speed high-static-pressure 120 mm fans and consider a push/pull arrangement where space allows. Use corrosion-inhibited coolant compatible with mixed-metal loops and follow standard leak-testing procedures after assembly. When painting or modding, disassemble the modular covers and protect the core area; the design facilitates safe DIY modifications without compromising structural integrity.