PipeFall: Pipe & Drain Sizing
Slope, Fixture Units & DFU
Only for iPhone
Free · In-App Purchases · Designed for iPhone. Not verified for macOS.
iPhone
Size drains, vents, traps, and water supply pipes to code — built on the
2021 IPC. Use your iPhone as a slope level. 100% offline, lifetime option.
Tired of flipping through code books on the job just to size a drain?
PipeFall turns fixture counts and pipe runs into code-referenced sizes
in seconds.
Here's how it works: pick your code, add your fixtures or enter your run,
and PipeFall returns the minimum pipe size, the required slope, and a
pass-or-fail check against the exact table it used. Done. No accounts.
No uploads. No tracking. Everything happens on your iPhone.
Whether you're roughing in a bathroom, sizing a building drain, or checking
a trap arm before the inspector arrives, PipeFall is built to be the fastest
way to get the number right the first time.
It covers drainage fixture unit sizing, water supply sizing with Hunter's
curve, drainage slope and fall in every common format, vent and trap arm
checks, pipe offsets and rolling offsets, pipe volume and weight, and thermal
expansion. Every table is based on the 2021 International Plumbing Code, so
the sizes match what the inspector checks against. You can even set your
iPhone on the pipe and use it as a slope level, then send the reading
straight into the calculator.
Every result is referenced to the code table behind it, so you can always
show your work. Save jobs, group your calculations, and export a clean PDF
for the file or the client. PipeFall runs 100% offline — no data collection,
no ads, no sign-in.
3-day free trial, then $1.99/week. Cancel anytime.
Terms of Use: https://taxlite.net/pipe_fall/terms.html
Privacy Policy: https://taxlite.net/pipe_fall/privacy.html
Ratings & Reviews
- This app has not received enough ratings or reviews to display an overview.
The developer, ZHENGQIAO JIANG, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Provider
- ZHENGQIAO JIANG
- Size
- 1.7 MB
- Category
- Utilities
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - Mac
Requires macOS 14.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
English and 4 more
- English, French, German, Japanese, Korean
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Lifetime ฿2,990.00
- Yearly ฿999.00
- Monthly ฿199.00
- Weekly ฿79.00
- Copyright
- © Alex Jiang 2026