I recently found out our food manufacturing building does not have a backflow preventer on our water main, the water is coming from the city. We have the hose bib style backflow preventers on all of the areas where water is used.
So 2 questions-
Will these bib like devices work since we don't have a main backflow preventer?
And if the answer is yes how do we test them (or is testing even needed) to pass this section of SQF?