KWC DVS Air BreakAir Break (Back Flow Preventer) Imagine this: dirty water trying to sneak back into your clean water pipes. Yuck! That's where the KWC DVS Air Break comes in. Air Break (Back Flow Preventer) is like a special guard that stops this from happening, keeping your water safe and clean. This little hero is made from strong, shiny brass that won't rust or break easily. KWC DVS Air Break is perfect for busy places like restaurants or schools where lots of