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Black cylindrical reservoir top with integrated pressure membrane visible on the upper surface

Aquacomputer

Aquacomputer ULTITUBE Reservoir Top with Pressure Membrane (34116)

SKU CH-VGQG-26FAM

Replacement lid for ULTITUBE reservoirs with an integrated membrane that compensates pressure changes without coolant loss

  • Product typeReservoir
  • Replacement lid for ULTITUBE expansion tanks
  • Integrated pressure membrane compensates temperature fluctuations
  • Coolant remains sealed during pressure changes
  • Maintains stable loop pressure without fluid loss

Replacement lid for ULTITUBE reservoirs

This Aquacomputer top replaces the standard lid on ULTITUBE expansion tanks and integrates a pressure compensation membrane. The membrane continuously balances pressure fluctuations caused by temperature changes without allowing coolant to escape. It is designed for liquid-cooling builders who want to maintain a sealed loop while accommodating thermal expansion. Part number 34116 identifies this specific component.

Suits loops using ULTITUBE tanks needing pressure

Builders with compatible ULTITUBE reservoirs gain automatic pressure management without adding external components. The membrane handles expansion and contraction cycles passively. This part does not fit reservoirs from other brands or non-ULTITUBE Aquacomputer models. Buyers who need a complete reservoir assembly or a different mounting style should look elsewhere.

How it compares

Measured against everything we stock in Liquid Cooling & AIO Coolers, at today’s prices. Recalculated every night.

Price $26.99
Cheaper than about 72% of the 1,190 comparable items (median $71.99).

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Specifications

Product
Product typeReservoir

Questions about this item

Do I need to own an Aquacomputer ULTITUBE expansion tank for this replacement lid to fit?

Yes, this lid is designed specifically as a replacement top for Aquacomputer ULTITUBE expansion tanks and will not fit other reservoir brands or models.

Will the pressure membrane still work correctly if I reuse my existing ULTITUBE tank body?

The integrated membrane continuously compensates for pressure fluctuations from temperature changes without coolant loss, functioning identically on your existing compatible ULTITUBE tank body.

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