FireOps CalcStandpipe PDP = Required Outlet/Nozzle Pressure + Hose FL + Elevation + Appliance/System Loss
Elevation estimate often uses pressure per floor or measured height, depending on department method.
Step-by-step process
Identify the operationKnow whether you are supplying the FDC, pumping to a standpipe outlet, or calculating attack hose beyond the outlet.
Set the desired outlet or nozzle pressureUse the pressure required by the nozzle, hose pack, or department standard.
Add attack hose friction lossCalculate the hose between the standpipe outlet and nozzle.
Account for elevationUse your department method for floor/height pressure.
Account for appliance/system lossInclude gated wyes, reducers, appliances, and any department standpipe allowance.
Worked example
Attack hose200 ft of 2½ inch
Flow250 GPM
Nozzle pressure50 PSI
Elevation/system allowancedepartment-specific
Final PDPFL + NP + elevation/system allowance
Standpipe systems vary. Treat these examples as training math, not a substitute for preplans, SOPs, or fire protection system data.
Common mistakes to avoid
- Using a default nozzle pressure that does not match the actual nozzle.
- Forgetting extra hose, elevation, or appliance loss.
- Using textbook coefficients when your department has known hose data.
- Treating a training estimate as a replacement for department SOPs or instructor direction.
How FireOps Calc helps
FireOps Calc is built to make this process faster on a phone. Open the web calculator, enter your hose, nozzle, flow, elevation, and appliance values, then review the math breakdown instead of only seeing a final number.
FAQ
Why is standpipe pumping not one fixed number?
Building height, system condition, hose packs, target flow, pressure-reducing devices, and department procedures all affect the needed pressure.
Can FireOps Calc be used for high-rise training?
Yes, as a training calculator and scenario builder when paired with local SOPs and instructor review.