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Black G1/4 inch manual exhaust valve, nickel-plated brass body, knurled grip, slotted top for tool adjustment

Barrow Mods

Barrow Mods TPQ-V2 G1/4" Manual Exhaust Valve Black diy cooling

SKU CH-3W00-040WR MPN TPQ-V2

G1/4" manual exhaust valve simplifies loop priming and removes air locks from the pump

  • Product typeFittings
  • Product colorBlack
  • Key featuresMakes priming your system easier and helps eliminate air loc
  • Easier loop priming with manual exhaust valve
  • Removes trapped air to prevent pump lock-up
  • G1/4" thread fits standard water-cooling fittings
  • Durable nickel-plated brass resists corrosion
  • Sleek black finish matches dark-themed builds

Barrow G1/4" Manual Exhaust Valve

The Barrow TPQ-V2 is a G1/4" threaded manual exhaust valve designed for custom liquid-cooling loops. It allows the user to vent trapped air manually, making initial priming easier and helping to eliminate persistent air locks that can affect pump operation. The fitting is machined from nickel-plated brass and finished in black. It suits builders assembling or maintaining open-loop water-cooling systems.

Installation check

Verify that your loop uses standard G1/4" threaded ports on components such as radiators, reservoirs or pump tops. The valve installs like any standard fitting and requires no special tools beyond those used for normal loop assembly. Ensure the chosen mounting point is accessible so the knurled knob can be turned by hand when the system is powered off. No additional power, software or proprietary connectors are involved.

Sustained operation

Under continuous use the valve remains passive until actuated; it does not vent automatically and therefore does not introduce a leak path during normal operation. The nickel-plated brass body resists corrosion from common coolants, maintaining seal integrity over long periods. Opening the valve briefly during maintenance releases accumulated pressure without disturbing the rest of the loop. It is not intended for frequent cycling or as a primary flow-control device.

How it compares

Measured against everything we stock in Heatsinks & Water Blocks, at today’s prices. Recalculated every night.

Price $10.99
Cheaper than about 68% of the 609 comparable items (median $15.99).

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Specifications

Product
Brand nameBarrow
Model nameTPQ-V2
Part numberTPQ-V2
Product typeFittings
Product colorBlack

Questions about this item

Does the valve ship with any sealing washers or extra fittings, or must those be purchased separately?

The package contains only the G1/4" manual exhaust valve itself; sealing washers and additional fittings are not included and must be sourced separately.

The listing shows a single black nickel-plated brass model — are other colours or thread sizes available for this TPQ-V2?

This TPQ-V2 is offered only in black with a G1/4" thread; no alternative colours or thread sizes are listed for this part number.

How does the G1/4" exhaust valve actually help when I am filling and bleeding a custom loop?

Opening the valve lets trapped air escape while coolant is added, equalising pressure so the pump primes faster and air locks are cleared without repeated case tilting.

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