Fire flow is the flow of water at 20 PSI at the site. Fire-Flow is independent of flow required of
sprinkler system--although having a fully sprinklered facility does reduce the volume of Fire flow.
IFC 2012 section 507.3 requires the fire flow to be determined by an approved method subject to the Authority Having Jurisdiction.
Section B103 of IFC authorizes fire chief to decrease or increase the fire flow.F ire Flow is a calculation tool and must be used
along with good engineering practice; it does not replace actual engineering knowledge and practice.
Fire-flow is dependent upon the fire area, construction type, occupancy type, and sprinkler protection.
Once determined, a flow test must be conducted to ensure adequate volume (GPM) of water is available at
20 residual pressure for fire flow or the flow required by the sprinkler system plus hose allowance, whichever is higher.
This can be verified using our Flow Test, Water Supply, and Friction Loss Applets.
This applet is great for:
- Engineer/Owner--as part of overall cost impact, if on-site water supply and/or fire pump are required
- Quality Control operation--ensuring AHJ is satisfied with the site selection before proceeding with the selected site.
- Authority Having Jurisdiction (AHJ)--quick checking of IFC requirements are met or not.