Tested 3 backflow prevention devices all passed Location: outside access mechanical room Use: detector assembly fire sprinkler Type: DC Make: Ames Model: BD-CV Size: 1/2’’ Serial number: J-3717 1st check: 3.0 2nd check: 3.0 Relief: Water pressure:topside Location: outside access mechanical room Use: fire sprinkler Type: DC Make: Ames Model: Deringer 30X Size: 4 inch Serial number: A22391 1st check: 3 2nd check: 3 Relief: Water pressure:topside Location: outside access mechanical room Use: domestic water Type: RP Make: Wilkins Model: 975XL2 Size: 1-1/4 inch Serial number: 4984301 1st check: 9.0 2nd check: 8.0 Relief: 3.5 Water pressure:topside