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1. Why do I suddenly need a backflow preventer after years of not having one?
2. I just leased this building, I am now required to install backflow prevention, why wasn't this required by the previous tenant and who should pay for this?
3. Will the installation of the backflow preventer affect the pressure and or flow of my water service?
4. Why is one backflow preventer above grade, and the other is below grade in a box?