Which type of standpipe system is designed to prevent water freeze problems?

Dry standpipe systems are specifically designed to prevent water freeze problems, making them ideal for environments where temperatures can drop below freezing. Unlike wet standpipe systems, which contain water at all times, dry standpipes are empty until needed. The absence of water in the pipes helps to eliminate the risk of freezing, as there is no water present to freeze and potentially burst the pipes. This design is crucial in areas that experience significant temperature drops, ensuring that the standpipe system remains functional and reliable in emergency situations.

In contrast, wet standpipe systems contain water at all times, making them susceptible to freezing if not properly insulated or heated in colder climates. Combined standpipe systems, which consist of both wet and dry components, may also face freezing issues in their wet sections. Manual standpipe systems, designed for user activation, do not specifically address the freezing problem in the same way that dry systems do. Therefore, dry standpipe systems are the most reliable choice for preventing freeze-related issues.