What is the maximum size of a dry system that can be permitted without a quick-opening device according to Minnesota regulations?

According to Minnesota regulations, the maximum size of a dry system that can be permitted without a quick-opening device is indeed 500 gallons. The purpose of this regulation is to ensure that the system can operate effectively and efficiently in the event of a fire. Dry systems are utilized in areas where freezing might occur, and without a quick-opening device, larger systems can have delayed activation, potentially allowing more fire spread or damage before the system can respond. Therefore, the regulation limits the size to 500 gallons to maintain a balance between the effectiveness of fire protection and the practical consideration of system design and safety. Proper understanding of these limits is crucial for compliance and safety in installation and maintenance practices.