WATER   STORAGE
    SPRINKLER DEMAND (GPM)     FIRE FLOW SETTING  
       
 
    SPRINKLER DURATION (MIN)      
         
    SEISMIC DESIGN CATEGORY     FIRE FLOW DURATION (HR)  
   
     
    DIAMETER OF TANK (FT)  
   
 
             
    REFILL RATE (GPM)     REQUIRED TIME TO REFILL (HR)  
         
    AIR GAP AT TOP OF TANK (FT)     SUCTION HEIGHT ABOVE BASE (FT)  
         
             
    MINIMUM HEIGHT OF TANK:     MINIMUM STORAGE CAPACITY:  
         
11
10
9
8
7
6
5
4
3
2
1
  WATER STORAGE TANK ANALYSIS
Minimum Size:
 
               
Minimum Water Storage Capacity:
 
Suppression System
Fire Flow
Given / Assumed:
Fire Flow Setting
Chosen
Refill:
Lost Capacity:
Total Height Lost to Water Below Suction
 and Air Break Above Waterline (hL)
Total Volume Lost to Water Below Suction
 and Air Break Above Waterline (VL)
Tank Size & Capacity:
Min. Required Volume of Supply Tank
 (between inlet of overflow and level of
 of vortex plate or discharge outlet)
 (VT,REQ)
Min. Required Volume of Tank
 (bottom of tank to top of air gap) (VT,MIN)
Refill Rate Check:
         
     
Acceptability
Standby Capacity:
Standby Volume in Excess of Minimum
 Capacity (VSTANDBY)
Total Water Storage Capcity:
Minimum Required Tank Height, Based
 upon Tank Diameter (hT, MIN)