Loading…
CompareOpen in Google Play
This app isn't in any of our charts yet.
Added a link to TradeTools — the one-app version of this calculator and 61 more, for HVAC, electrical, plumbing, fire protection, solar and carpentry. Nothing else changed.
NFPA 14 Class I, II, III: hose valves, GPM, PSI, friction loss, high rise.
Standpipe system demand per NFPA 14: flow, residual pressure and minimum pipe size for Class I, II and III systems, wet or dry, manual or automatic. WHAT IT CALCULATES - Class I: 500 gpm for the first standpipe, 250 gpm for each additional one - Class II: 100 gpm - Class III: the Class I flow rule with Class II hose stations - Maximum total flow: 1000 gpm when the building is sprinklered throughout, otherwise 1250 gpm - Minimum residual pressure: 100 psi Class I and III, 65 psi Class II - Elevation pressure at 0.434 psi per foot of height - Minimum pipe size: 4 in Class I and III, 6 in riser above 75 ft, 2 in Class II CODE REFERENCES BUILT IN - NFPA 14 section 7.10.1.1.5 - maximum total system flow - Minimum residual pressure at the topmost outlet HOW IT WORKS Enter class, number of standpipes, building height and system type. You get total flow, required pressure at the pump and the minimum pipe size. CORE FEATURES - Works 100 percent offline, no signal needed on site - Calculation history you can reopen and reuse - PDF export for submittals and field records - Light and dark themes - English and Spanish - Material Design 3 interface TYPICAL USES - Checking a layout on site before the pipe goes up - Verifying a contractor submittal during plan review - Sizing during a bid walk without pulling the code book out of the truck - Backing a field decision with a PDF you can attach to the job file - Studying for NICET certification WHAT THE PDF REPORT INCLUDES - Every input you entered - The calculated results with units - Date and time of the calculation OPTIONAL PRO UPGRADE - $2.99 ONE-TIME IN-APP PURCHASE The following features require a separate one-time in-app purchase. They are not required to use the calculator: - Unlimited saved calculation history - PDF export of results - Dark theme - Ad-free experience WHO IT IS FOR - Fire protection engineers and system designers - Sprinkler fitters and installers - Fire inspectors and AHJ plan reviewers - Contractors preparing bids and submittals - NICET candidates and fire protection students ACCURACY NOTE Results are a design aid, not a stamped design. Verify against the edition of the standard adopted in your jurisdiction and confirm with the authority having jurisdiction. Part of FireTools, the fire protection calculator collection. More tools at tradetools.dev/fire