What type of hydrant is used in locations where temperatures fall below freezing?

Dry barrel hydrants are specifically designed for areas that experience freezing temperatures. The key feature of a dry barrel hydrant is that the valve, which controls the flow of water, is located above the frost line. This design prevents water from remaining in the barrel of the hydrant, eliminating the risk of freezing and cracking during cold weather.

When firefighters need to use the hydrant, they can open it to allow water to flow without concern that the water inside will freeze when the hydrant is not in use. This makes dry barrel hydrants an essential choice in climates where freezing conditions are common, providing reliable access to water for firefighting purposes year-round.

Wet barrel hydrants, on the other hand, keep water in the barrel at all times, which makes them unsuitable for freezing climates as they are at risk of freezing and causing damage. Pressure relief valves and anchor valves also serve different purposes and are not directly related to the freezing concerns of hydrant design.