In areas with certain climate conditions, what type of fire hydrants might be installed?

In areas with specific climate conditions, particularly where temperatures can drop below freezing, dry barrel hydrants are often the preferred choice. These hydrants are designed to prevent water from remaining inside the barrel, which reduces the risk of freezing. When a dry barrel hydrant is opened, the water only flows from below the frost line, allowing the upper section to drain completely after use.

On the other hand, wet barrel hydrants keep water inside the barrel at all times, which makes them unsuitable for regions prone to freezing temperatures. They are not equipped to drain the water effectively and can lead to freeze-related issues.

Flush hydrants are typically used in applications where a temporary water supply is needed and are less common for fire protection. Hydrant varieties based on pressure are not directly related to the climate conditions but rather to the system design and requirements.

Thus, the selection of dry barrel hydrants in colder climates is specifically due to their construction, which accommodates the environmental conditions, ensuring functionality and preventing operational issues during cold weather.