What the Libra zodiac sign is all about: Libra is the seventh of the 12 zodiac signs, which begins its cycle in early fall every year during Libra seasonâwhich falls around September 23-October 22.
How it works. This schematic shows the component parts of a typical leak-down tester. The gauge on the right is held at a standard pressure by adjusting the pressure regulator while the gauge on the left shows an example reading of 85-or 15% leakage.
Steps. 1  1. Safety first - If the system you are looking at has something that burns in (like natural gas or propane), make certain that the area is well ventilated and there is nothing that will make a spark while you do your test. 2  2. Mix a few tablespoons of dish soap into a container of water. 3. Pressurize the system (turn on the gas, or use an air supply of some kind) 4. Wet down the suspected parts with the soap solution. If you see bubbles form on them, then you have found the leak! This approach will work on tires, inner tubes, gas lines pretty much anything with a gas under pressure inside.