Skip to main content

Table 7 Miscellaneous sprinkler system component data

From: A review of sprinkler system effectiveness studies

Description Source Unit Minimum Mean Maximum
Pressure switch (Watanabe 1979) per demand   8.99 × 10 -4  
Down time (Watanabe 1979) per demand   3.7 × 10 -3  
Incomplete protection (Watanabe 1979)   1.03 × 10 -4   
Alarms fail to function (Moelling et al. 1980) per demand 2.68 × 10 -2 3.62 × 10 -2 4.81 × 10 -2
Personnel fail to trip manual release (Moelling et al. 1980) per demand   2.00 × 10 -1  
Back-up batteries for diesel pump (Moinuddin et al. 2009) per demand   2.68 × 10 -2 4.92 × 10 -2
Mains power in building (Moinuddin et al. 2009) per demand   1.61 × 10 -4 3.11 × 10 -4
Building power generator (Moinuddin et al. 2009) per demand   5.24 × 10 -3 1.25 × 10 -2
Pressure switch (Moinuddin et al. 2009) per demand   7.82 × 10 -3 1.17 × 10 -2
Direct brigade alarm (Moinuddin et al. 2009) per demand   5.27 × 10 -3 9.57 × 10 -3
Jacking pump (Moinuddin et al. 2009) per demand   9.85 × 10 -3 1.55 × 10 -2
Back-up batteries for brigade alarm (Moinuddin et al. 2009) per demand   2.57 × 10 -3 6.71 × 10 -3
Alarm motor and gong (Nash and Young 1991) failures/year   1.6 × 10 -2  
Accelerator (Nash and Young 1991) failures/year   7.9 × 10 -3  
Alarm motor and gong (Finucane and Pinkney 1988) failures/year   1.6 × 10 -2  
Accelerator (Finucane and Pinkney 1988) failures/year   8.0 × 10 -3  
Flow alarm (Budnick 2001) failures/hour 5.80 × 10 -6 1.50 × 10 -5 2.70 × 10 -5
Motor gong (Budnick 2001) failures/hour 4.10 × 10 -5 2.50 × 10 -5 1.30 × 10 -5
Fire department connection (FDC) (Budnick 2001) failures/hour   0