Details
A dual pump top that runs two Laing/Lowara DDC pumps in series, milled from a solid 30 mm acetal block with three G1/4 ports. The Watercool HEATKILLER Multitop DDC X2 (31016) raises the delivery head and can be extended with expansion tops.
Properties
- Pump
- Two DDC pumps in series (not included)
- Ports
- 3x G1/4
- Size
- 125 x 62 x 30 mm
- Material
- Acetal (POM)
The HEATKILLER Multitop series
Watercool says its new HEATKILLER® Multitop series for Lowara/Laing DDC pumps is characterized by a unique construction and expandability. The Multitop X2 is manufactured from a solid acetal block 30mm thick, and in Watercool's words it convinces with an outstanding quality of workmanship.
Flow paths and mounting
The internal channel structure has been optimized for delivery head and flow capacity. Watercool's complex manufacturing process allows it to mill the positioning attachments from one block. That results in less vibration at the transition to the pump, which therefore also contributes to quieter operation. It also greatly simplifies installation.
Two pumps in series, and more
The X2 provides a serial connection of two DDC pumps, and thereby increases the delivery head. An expansion is easily possible with Watercool's EXPANSION TOPs, theoretically allowing infinite scaling. This modular design is held together by a solid M5 screw.
What the loop needs
The top takes two DDC pumps, which are not included; remove any standard pump top from them first. Its G1/4 ports take standard fittings. For a third pump, add the HEATKILLER Multi Expansion-Top DDC (31018) or the Multitop DDC Expansion Kit (31020), which contain the parts needed. The optional Decoupling-Kit (31019) reduces vibrations. For one pump only, the HEATKILLER Singletop DDC fits.
Compatible pumps
The series fits LAING DDC pumps and pumps of the same type:
- Laing / Xylem / Lowara: DDC 4.2PWM, 3.2PWM, DDC 3.25, DDC 1T, DDC 1T Plus, DDC 1RT, DDC 1RT Plus
- Alphacool: DDC310
- EKWB: EK-DDC 3.2 PWM, EK-DDC 4.2 PWM
- Koolance: PMP-400
- Swiftech: MCP35B, MCP35X, MCP355
- Identically constructed pumps
Technical data
| Dimensions (LxWxH) | 125 x 62 x 30 mm (without connections, without pump) |
| Material | Acetal |
| Threads | 3x G1/4 |
| Temperature resistant up to | 80 °C |
Notes
- Only the original O-ring of the Laing DDC pump may be used; check that it sits properly before you fix each pump with the supplied screws.
- Watercool recommends demineralized or deionized (distilled) water with a corrosion inhibitor as coolant.
In the box
- 1x MULTITOP DDC X2
Watercool's assembly instructions cover the whole DDC Multitop series, including the expansion steps.








