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Black cylindrical reservoir with silver end caps, 120mm acrylic tube, matte finish

PrimoChill

PrimoChill CTR Hard Mount Reservoir 120mm TX Matte Black POM

SKU CH-0WV3-M5VVJ

A 120 mm hard-mount reservoir with compression-ring end caps that seal acrylic tube without cutting, 57 mm inner diameter, 63 mm outer diameter, 158 mm overall length and G 1/4 ports

  • TypeReservoir
  • Compression-ring end caps seal without cutting tube
  • 120 mm acrylic tube with 57 mm inner diameter
  • G 1/4 threads accept standard water-cooling fittings
  • 158 mm overall length including 38 mm end caps
  • Matte black POM end caps made in the USA

120mm CTR Hard-Mount Reservoir

The PrimoChill CTR Phase II is a compression-tube reservoir built for custom-loop builders who want a secure seal without cutting or tapping the acrylic tube. Its compression-ring end caps lock the tube in place with minimal force, reducing the risk of cracking during assembly. The 120mm nominal length suits compact chassis layouts while still providing visible coolant volume. Made in the USA from laser-cut acrylic with a matte-black POM finish.

G1/4 Thread Limits

Every port on the reservoir uses a G 1/4 thread, so only fittings with that exact thread pattern will seal correctly. The two included three-port end caps and four low-profile port caps share the same thread standard, meaning no mixed-thread adapters are needed inside the loop. Builders must plan their inlet, outlet, drain and fill positions around the fixed three-port geometry on each end cap. Thread depth and pitch follow the G 1/4 specification without deviation.

158mm Overall Length

The reservoir measures 158mm from end-cap face to end-cap face, a figure that already includes the 38mm added by the compression end caps. This fixed length determines whether the unit fits between mounting points or inside a designated reservoir bracket in the case. No shorter or longer version is described in the data, so builders with tighter or taller clearance requirements cannot use this specific model.

Highlights

  • Compression-ring end caps seal without cutting tube
  • 120 mm acrylic tube with 57 mm inner diameter
  • G 1/4 threads accept standard water-cooling fittings
  • 158 mm overall length including 38 mm end caps
  • Matte black POM end caps made in the USA

Specifications

TypeReservoir

Questions about this item

Which reservoir length should I choose for a standard 120 mm fan mount?

The 120 mm CTR measures 158 mm overall including the 38 mm end caps, so it aligns with a typical 120 mm mounting pattern.

What does the 57 mm inner diameter mean for coolant volume in my loop?

A 57 mm ID acrylic tube holds significantly more fluid than narrower reservoirs, reducing top-up frequency and improving thermal mass.

Will the G 1/4 threads limit my fitting choices or flow rate?

G 1/4 is the universal water-cooling thread; any standard G 1/4 fitting connects directly and the 57 mm bore ensures minimal restriction.

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