Flow & pressure

Pumps & reservoirs,
the loop's quiet engine.

Three-in-one pump-reservoir-manifold combinations built around PWM-controlled D5 pumps. The reservoir, the pump, and the distribution manifold sit on a single chassis-mountable assembly — fewer fittings, fewer leak paths, and a fixed pressure envelope across the workstation catalogue.

2: SKUs in family
2: combo units
D5 G3: pump generation

Configurations

Single pump or dual pump, same loop discipline.

Single D5

X3 and X6 — single PWM D5 pump

One PWM-controlled D5 pump driving the loop, with three- or six-way manifold outputs depending on chassis density. The single-pump configuration suits typical workstation builds where heat rejection capacity tracks GPU count.

PWM-controlled · 30 000 Pa max in the loop

Dual D5

X11 — dual D5 pumps in series

Two PWM-controlled D5 pumps arranged in series for redundancy and headroom in higher-density workstation builds. A pump failure does not stop the loop — the second pump carries flow until the first is replaced. Eleven-way manifold output.

Pump redundancy · for dense workstation builds

Pump & reservoir

EK-Pro Pump Reservoir Manifold X6 D5 - Acetal

Type: combo
Compatibility: EK-Pro GPU and CPU water blocks with G1/4" ports
EAN: 3831109910399

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Pump & reservoir

EK-Pro Pump Reservoir Manifold X3 D5 - Acetal

Type: combo
Compatibility: EK-Pro GPU and CPU water blocks with G1/4" ports
EAN: 3831109911600

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Shared specification

Every unit in this family shares the following.

Pump generation	D5 G3 - third-generation Xylem D5 pump head, PWM speed control, 23 W max.
Max flow rate	1 500 L/h at zero static head · 3.5 m H₂O max head.
Port standard	G1/4″ throughout · compatible with EK-Pro fittings and manifolds.
Working pressure	30 000 Pa max in loops with EK-Pro Pump Reservoir Manifold · 75 000 Pa max otherwise.
Speed control	4-pin PWM · signal range 20–100% duty cycle · tachometer output.
Country of origin	Manufactured in Komenda, Slovenia.

Standalone or combo?

The right choice depends on chassis geometry, whether you are adding to an existing loop, and whether you need the pump and reservoir to be co-located. Tell us the build and we'll confirm which configuration fits.

Engineering-grade cooling, component by component.

Validated kits for specific large tower chassis.

Bespoke solutions for unique requirements.

RM-4U8G

Pumps & reservoirs,
the loop's quiet engine.

Single pump or dual pump, same loop discipline.

X3 and X6 — single PWM D5 pump

X11 — dual D5 pumps in series

EK-Pro Pump Reservoir Manifold X6 D5 - Acetal

EK-Pro Pump Reservoir Manifold X3 D5 - Acetal

Every unit in this family shares the following.

Standalone or combo?

Pumps & reservoirs, the loop's quiet engine.

Single pump or dual pump, same loop discipline.

X3 and X6 — single PWM D5 pump

X11 — dual D5 pumps in series

EK-Pro Pump Reservoir Manifold X6 D5 - Acetal

EK-Pro Pump Reservoir Manifold X3 D5 - Acetal

Every unit in this family shares the following.

Standalone or combo?

Pumps & reservoirs,
the loop's quiet engine.