Flowforge: Fire Sprinkler Kit

Flowforge puts a sprinkler fitter's daily math and reference tables in one fast, offline app. Built by a life-safety trades background, not a software company guessing at what the field needs.

HYDRAULICS
• K-Factor Flow — Q = K√P, solve for flow, pressure, or K
• Friction Loss — Hazen-Williams with real Sch 40 / Sch 10 / copper / CPVC pipe IDs
• Flow Test Analysis — project available gpm at 20 psi from static, residual, and test flow (Pro)
• Pitot Flow — outlet flow from pitot pressure and coefficient
• Pipe Volume — gallons per run with a running system total (Pro)
• Water Velocity and Elevation ↔ Pressure converters

SPACING & LAYOUT
• Sprinkler Spacing — max coverage and spacing by hazard and construction
• Hanger Spacing — steel, lightwall, copper, and CPVC tables
• Trapeze Sizing — section modulus from span and load, with the member picked for you (Pro)
• Obstructions — beam rule and three-times rule calculators (Pro)
• Deflector Position — distance below ceiling and storage clearance checks (Pro)

SYSTEMS & TESTING (Pro)
• Dry System Air — air pressure from supply static and valve ratio
• Pipe Pitch — drop over run for drainage
• Fire Pump Check — churn / 100% / 150% test points against the rated curve
• Standpipe Demand — Class I–III flow and pressure
• Main Drain Test — compare against baseline with the 10% rule
• Hydrostatic Test — required pressure and duration

REFERENCE
• K-Factor Chart — orifice sizes, threads, % of K5.6
• Temperature Ratings — classifications with glass bulb colors and frame colors
• NFPA 25 ITM — searchable inspection, testing, and maintenance frequencies (Pro)
• Pipe Data — OD, ID, gallons per foot, water-filled weight
• Fitting Equivalent Lengths — C=120 table with C-factor adjustments (Pro)
• Hazard Classifications, System Types, and every formula on one card

FREE VS PRO
12 tools are free forever, with a small banner ad. One inexpensive one-time purchase unlocks all 26 tools and removes ads permanently. No subscription. No account. No sign-in.

BUILT FOR THE FIELD
• Works 100% offline — riser rooms and basements have no bars
• Dark interface built for dim mechanical rooms
• Monospace results you can read at arm's length

Flowforge is a field reference, not an engineering authority. Always verify results against the adopted NFPA edition, product listings, approved drawings, and your AHJ.

From TapForge Studios — the maker of Pipeforge, Voltbox, Airforge, and Fireforge. Trade tools by the trades.

Recent changes:
Your numbers now stay put: every tool remembers its last inputs. Pin favorite tools to the top, jump back in from Recent, and save or share any result in one tap — handy for texting a friction-loss or flow-test result to the foreman.

Flowforge now follows your phone’s light/dark setting by default (change it anytime in Settings), and Settings adds feedback and privacy options.

Also: faster, smaller app and a startup fix.