NFPA 13-2010: 6.2.9 A minimum of six spare sprinklers corresponding to the types and temperature ratings installed in the building are required to be kept on site, stored in a cabinet where the temperature will not exceed 100 degrees F. A wrench for each type of sprinkler is also kept on site. The requirements for the minimum number of spare sprinklers increase with system size. #ASHEComplianceTip