Details
A replacement O-ring for the D5 pump seat of Watercool's HEATKILLER® Tube reservoirs. The Watercool HEATKILLER® Tube - Spare Parts - O-Ring for D5 pump (30251) is the gasket that seals the HEATKILLER Tube D5 Base against the D5 pump: one black NBR O-ring, size 55x3.
Properties
- For
- HEATKILLER Tube D5 Base (D5 pump seal)
- Pieces
- 1 O-ring
- Size
- 55x3
- Material
- NBR, black
Where it sits
On the D5 versions of the HEATKILLER Tube, the pump motor is held under the reservoir bottom by a lock ring, and this ring of NBR rubber makes the seal between the two. It fits the D5 bottom of the Tube 100 D5, the Tube 150 D5 and the Tube 200 D5.
Fitting it
Drain the reservoir and take it out of the loop first. Undo the M4x12 screws on the bottom, take off the D5 lock ring and lift out the pump. Turn the empty reservoir upside down and lay the new O-ring in place.
Guide the pump cable through the lock ring, set the pump on and tighten the M4x12 screws evenly and crosswise. Take care not to squeeze or damage the cable while you do it.
Notes
- Check all seals before you start the loop again. If an O-ring is squeezed or damaged, the reservoir must not be used.
In the box
- 1x O-ring for HEATKILLER® Tube D5 Base
Watercool's assembly instructions cover the whole HEATKILLER Tube series, with the D5 pump installation step by step.






