You’ll need to let air into the tank to displace the water, and in most cases, you can do this by opening hot water faucets ...

The tank uses a traditional tire valve-style stem that can lose air over time. When the air pressure drops, the bladder can't push out as much water. Here's how to check the pressure. First ...

With these flights, they became the first to successfully pilot a power-driven, heavier-than-air machine ... the valve was used only to stop the engine. A long, narrow water tank was attached ...