What does the term 'wet barrel hydrant' refer to?

The term 'wet barrel hydrant' specifically refers to a type of fire hydrant that maintains a constant supply of water within the barrel, meaning it is filled with water at all times, ready for immediate use. This design allows firefighters to quickly connect hoses and access water during emergencies without needing to wait for the hydrant to be activated or filled.

Wet barrel hydrants are commonly found in areas where freezing temperatures are less of a concern because having water inside the barrel at all times could lead to freezing and damage. This is why they are less suitable for climates that experience extreme cold, making other types of hydrants, like dry barrel hydrants, more appropriate in those regions.