When the subject of backflow protection came up, I emphasized some of the recent changes in the code requirements. Of course, the spill-proof vacuum breaker was added as an acceptable backflow preventer. The beauty of this backflow preventer is that a valve can be located downstream of the vacuum breaker, and you can be assured that there will be no spitting action from the valve. Standard pressure vacuum breakers can spit or leak water when protecting against backflow.
Next, I mentioned how great it is that the new code clearly states that all new backflow preventers must be tested and certified prior to being placed in service. My joy, regarding this requirement, was met by dead stares. I quickly realized that the joy I felt was not being shared.