PrimoChill CTR™ (Compression Tube Reservoir) System Phase II is the latest reservoir catering towards the modders and their need for quality and modularity. What makes the CTR unique and unlike anything on the market today is the ingenious compression ring end caps that make a watertight seal without the need to cut or tap the end of the reservoir. Similar to the PrimoChill Rigid fittings, the CTR Phase II uses the same principal for securing and sealing off the acrylic tube with little to no force on the tube which prevents cracking. CTRs giving the user the flexibility of color as well as sizes to fit their build perfectly.

Getting to know your CTR Reservoir

There are more components than usual due to the unique and modular design of the PrimoChill CTR reservoirs. This allows for a truly modular design with full customization. In addition, this creates a stronger reservoir as it’s harder to crack and can withstand more wear and tear. Take a look at the breakdown below to see what it’s all about.



  • Inner Diameter (ID): 2.25 inches / (57mm)

  • Outer Diameter (OD): 2.5 inches / (63mm)

  • Fitting Thread:G 1/4

  • Warranty: 1 year

  • Material:Laser Cut Acrylic Tubes


  • Fittings: G1/4 thread

  • Pump:Laing D5 variants / PrimoChill PWM D5