What type of hydrant is typically used for water distribution in areas with freezing temperatures?

A dry-barrel hydrant is specifically designed for use in climates where freezing temperatures can occur. This type of hydrant has a design that prevents water from remaining in the barrel once it is turned off.

In a dry-barrel hydrant, the operating mechanism and the body of the hydrant are located below the frost line, which is the level below ground where the temperature remains above freezing. When the hydrant is turned off, a valve at the bottom of the barrel closes to prevent water from remaining in the upper parts of the hydrant. This design ensures that any water in the hydrant drains out, significantly reducing the risk of freezing and the consequent damage that can occur if water were to freeze in the hydrant itself.

The other types of hydrants listed are not suitable for cold climates. Wet-barrel hydrants retain water in their barrel at all times, which poses a risk of freezing. Compression hydrants are generally used in specific applications but do not have the same freeze protection as dry-barrel hydrants. Flush hydrants are primarily used for flushing purposes and also do not provide the necessary design features to prevent freezing. Therefore, the dry-barrel hydrant is the appropriate choice for areas experiencing cold weather.