Check valve

Have you ever played with a one-way door or gate where you can only go through it in one direction and not the other way? Well, that's what a check valve is. It's like a special door or gate that can only allow a substance like water, air, or gas to go through in one direction and stops it from going back in the opposite direction.

Just like when you blow air into a balloon, it fills up with air, and if you stop blowing, the air stays inside the balloon. A check valve works the same way, but instead of air, it controls the flow of things like water or gas.

Let's say you have a pipe that has water flowing in one direction, and you need to make sure it doesn't flow back in the opposite direction. You can use a check valve to stop this from happening.

The check valve is like a little door or gate that opens when the water flows in one direction and closes when the water tries to flow back in the opposite direction. This means that the water can only flow in the direction you want it to go, and the check valve stops it from going in the opposite direction.

A check valve is like a little traffic cop that directs the flow of water or gas in the right direction. It's an important part of many machines and systems that need to control the flow of fluids and gases.