Granzon GYB II Automatic Digital Air-Pressure Leak Tester for PC Water Cooling, G1/4

Granzon GYB II Automatic Digital Air-Pressure Leak Tester for PC Water Cooling, G1/4

TL;DR: The Granzon GYB II is an automatic pressure-decay leak tester used to validate a custom water cooling loop before any coolant is added. An internal electric pump pressurizes the closed loop and the on-board screen shows live pressure readings, making it easy to spot a slow pressure drop from a...

Common Applications

The Granzon GYB II is an automatic pressure-decay leak tester used to validate a custom water cooling loop before any coolant is added. An internal electric pump pressurizes the closed loop and the on-board screen shows live pressure readings, making it easy to spot a slow pressure drop from a micro-leak around a fitting, O-ring or stop plug. The tester body measures 76.3 x 62 x 40.5 mm and connects via a standard G1/4 thread. The package includes push fittings and a testing tube so the unit can be tapped into any G1/4 port on a reservoir, block or radiator.

Frequently Asked Questions

Q: How does the GYB II detect a leak?

A: It pressurizes the closed loop with air via an internal pump, then watches the pressure readout for decay. Any drop over the test window indicates a leak at a fitting, O-ring or seal.

Q: How does it connect to the loop?

A: Through a standard G1/4 threaded port. Push-fit adapters and a flexible test tube are included to attach to any reservoir, block or radiator port.

Q: What are the dimensions of the tester body?

A: 76.3 x 62 x 40.5 mm, sized to sit on the desk or hang off the loop while testing.

Q: What kind of display does it use?

A: A digital display that shows live pressure readings and test status.

Q: Should I test with air before adding coolant?

A: Yes. Pressure-testing with air first catches every leak point dry, so a failed seal cannot dump coolant onto motherboards or GPUs.