Fire protection system with the valve, automatic sprinkler system, more image.Drinking system is characterized by the requirement of rapid sprinkler, generally used to act as a fire separation. Therefore, the nozzle is open, the system action, the design of all open nozzles within the water jet water spray. Deluge system uses deluge valve control, usually the pipe is anhydrous. Features and functions Pre-action system features that can take both dry and wet systems, usually within the pipeline is anhydrous, and the alarm system linkage, once the alarm can be pre-filled, the nozzle is closed, the system uses rain Laval valve. This system requires a higher benefit is usually no water pipe can prevent mistaken spray or cracking. Rain shower system and pre-action system using different parts of the design flow and the amount of water required, which is the biggest difference between them. As for the other differences in working principle, it is actually not too much.