Which device is installed on the industrial food grinder water supply line to prevent back-siphonage of waste?

The correct choice is a vacuum breaker because it is specifically designed to prevent back-siphonage, which can occur when there is a negative pressure in the water supply system. When this negative pressure is present, it can cause water — including contaminants or waste from the industrial food grinder — to be siphoned back into the potable water supply. A vacuum breaker creates an air gap that breaks the vacuum, allowing air to enter the system and thus preventing the unwanted backflow of water.

In this context, a vacuum breaker is the most suitable device because it addresses the specific issue of siphonage effectively without being affected by the pressure fluctuations that might occur in the system. It is commonly used in various installations where there is a risk of contaminants entering the water supply, making it the ideal choice for safeguarding health and safety in food processing operations.

The other devices listed do not provide the same effective prevention mechanism. For example, while a check valve allows flow in one direction and can prevent backflow, it may not be sufficient in cases where a vacuum is created. A gate valve is primarily used for isolation and does not prevent back-siphonage. A reduced pressure device protects against backflow, but is intended for more complex systems where a substantial risk of