Fire Suppression — Addition and/or Alterations

INSTALL NEW FIRE SUPPRESSION SYSTEM COMPLYING WITH NFPA 13 & 13R THROUGHOUT THE BUILDING TO INCLUDE 4" MAIN FIRE SERVICE LINE WITH A 4" WILKINS 350AST BACKFLOW PREVENTION ASSEMBLY AS PER APPROVED PLANS. ALL WORK SHALL BE PERFORMED BY A FIRE SUPPRESSION CONTRACTOR LICENSED BY THE CITY OF PHILADELPHIA.