PlumbFlow Pro: Pipe Sizing

Kihana Technology

In-app purchases

About this app

PlumbFlow Pro is the pocket toolkit for plumbers, pipefitters and contractors. Size supply lines, check drain slopes, draw a quick takeoff and send a professional estimate or invoice, all on your phone or tablet and all without an internet connection.

SIZE PIPES WITH CONFIDENCE
• Supply sizing with Hazen-Williams or Darcy-Weisbach
• Live velocity gauge with optimal, high and too-fast zones
• Pressure drop, residual pressure, friction gradient, head loss and Reynolds number
• Auto-recommend the smallest size that keeps velocity in range
• Imperial and metric units, switch anytime

GET DRAIN SLOPE RIGHT
• Grade, angle, pitch and total fall for any run
• Code-minimum check by pipe size, with clear "below minimum" warnings
• Fixture-unit (DFU) load and capacity check for drains

QUICK TAKEOFF
• Sketch pipe runs on a grid and drop elbows, tees and valves
• Lengths and fitting counts tallied automatically per material and size
• Convert the takeoff to a bill of materials with one tap

ESTIMATES AND INVOICES
• Labor hours and rate, material markup and tax
• Clean, branded estimate and invoice PDFs with your company details
• Save, print or share the PDF by email or messaging apps (Pro)

YOUR PRICE LIST (PRO)
• Save your supplier prices per material, size and fitting
• Every new takeoff is priced automatically
• Keep separate price lists per currency

BUILT FOR THE JOB SITE
• Works 100% offline: no account, no sign-up, no ads, no tracking
• The app has no internet permission; your jobs and clients stay on your device
• Pipe catalog for PVC, CPVC, copper, PEX and more, with real inside diameters
• 9 languages: English, Spanish, French, German, Portuguese, Arabic, Hindi, Bengali and Chinese
• Any currency, light and dark themes
• Designed for phones, foldables and tablets in portrait and landscape

FREE VS PRO
Free: all calculators, pipe catalog, takeoff and estimates for up to 2 jobs, and full document preview.
PlumbFlow Pro, a single one-time purchase with no subscription, adds unlimited jobs, PDF save, print and share, and your own supplier price list.

PlumbFlow Pro provides engineering estimates to help with planning. Always verify sizing and slopes against your local plumbing code and the authority having jurisdiction.