AnsweredAssumed Answered

Fire Hydrant Flow Testing

Question asked by fire&ems on Nov 10, 2017
Latest reply on Dec 17, 2017 by maasaicontracting


   I have several questions regarding the documentation and clarification of fire hydrant flow testing per NFPA 291.

  • When classifying hydrants, is the color coding based on volume of calculated flow or volume at desired pressure (20 psi)?
  • The  pressure hydrant (static/residual) being tested, are the results recorded from that test for that hydrant?
  • If a twenty percent drop in pressure from static to residual is not obtained, will the flow test results be in accurate?  How important is it that a twenty percent drop is obtained?  Is there a formula or equation that can be used to determine a twenty percent residual pressure from an already identified static pressure?


Thank you,



Captain Paul J Fuller

Bravo Platoon

Brigantine Fire & Ems Department   

(609) 266-2814