Why does every tea kettle have a vent?

Every tea kettle doesn't have a vent. However, most tea kettles do, and it's for a very important reason: safety.

Here's why:

* Preventing Explosions: When water boils, it turns to steam, which expands significantly. If the pressure builds up inside the kettle without a way to escape, the kettle could explode. This is a serious hazard, potentially causing burns and other injuries.

* Regulating Pressure: The vent allows steam to escape, preventing excessive pressure buildup. This ensures the kettle operates safely and prevents potential damage.

* Whistling for You: Many kettles have a built-in whistle that's connected to the vent. When the water boils, the steam escapes through the vent, creating the familiar whistling sound. This serves as a signal that the water is ready, eliminating the need for constant monitoring.

In summary, the vent on a tea kettle serves a crucial safety function, preventing dangerous pressure buildup and ensuring the kettle operates safely and effectively.