I just noticed that my pressure vacuum breaker, which provides
backflow protection by keeping my lawn sprinkler water separate from
my house-water, is leaking. I'm having a guy in on Tuesday to check it
out. I'm concerned about health issues if the backflow device is
compromised. How likely is it that the lawn water and house water
could mix if in fact the PVB is broken? Would appreciate answers from
plumbers familiar with the subject. Thanks in advance - Brian.