Things You'll Need
Instructions
Leak Detector Method
Attach a flexible hose to the helium tank's valve. Keep the valve closed.
Connect the opposite flexible hose end to a leak detector device. Make sure that both ends of the flexible hose are firmly attached to the tank and device.
Partially open the helium tank's valve, allowing a small amount of helium to leak through. Turn on the leak detector.
Observe the leak detector's front display. The device will sound an alarm if a leak is detected. The helium tank's internal pressure will oscillate if there is a leak. This pressure oscillation informs the leak detector that the tank has a crack or hole along its assembly.
Soapy Bubble Method
Mix liquid soap with water. Make sure to be gentle during mixing; no bubbles should be produced at this point.
Coat the helium tank's exterior with the soapy mixture with a rag.
Observe the tank's exterior surface. Any bubble formation indicates a leak.