Why does a soft drink dispensing machine require backflow protection?
Soft drink dispensers (post-mix carbonators) use carbonated water mixed under pressure with syrup and water to provide soft drinks beverages. Many, if not most water pipes are made of copper. When carbonated water comes into contact with copper, it chemically dissolves the copper from the pipe. This copper-carbonate solution has been proven to be a risk to the digestive system.

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1. What is backflow?
2. What is backpressure backflow?
3. What is back-siphonage?
4. What is a backflow preventer?
5. Why does a soft drink dispensing machine require backflow protection?