PipeFall vs Flowbox

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

Flowbox is a professional toolkit for plumbers — job-site calculators covering drainage, venting, water supply, gas piping, and pipe fitting, all on-device with no account required. PIPE FUNDAMENTALS • Pipe Slope — solve rise, run, or grade against IPC minimums • Pipe Offset — travel and run for 45°, 22.5°, 60°, and other fittings • Flow Rate & Pressure Drop — Hazen-Williams friction loss for water pipe runs • Pipe Volume — water capacity of a pipe segment from ID and length DRAINAGE & VENTING • Drain Sizing — minimum drain pipe size from fixture unit load (DFU) • Vent Sizing — vent pipe diameter from DFU load and developed length • Sump/Ejector Pump Sizing — total dynamic head and horsepower from inflow and lift • Grease Trap Sizing — interceptor capacity from kitchen fixture flow rate SUPPLY & GAS • Water Supply Sizing — distribution pipe size from fixture unit demand (WSFU) • Gas Pipe Sizing — pipe size from BTU load and length, longest-length method • Water Heater Sizing — first hour rating or tankless GPM from peak demand • Water Hammer Arrestor — PDI-WH201 size from branch fixture units • Thermal Expansion — pipe growth and expansion loop size by material WHY FLOWBOX Pro unlock is a one-time purchase — no subscription, ever. No ads. No server required to use any calculator. Free tools (Pipe Slope, Drain Sizing, Pipe Volume) cover everyday use; Pro unlocks the full set. An optional Pro feature lets you sync your saved calculations and projects across your own devices via your own iCloud or Google Drive — off by default, and your data never touches our servers because we don't have any. Flowbox is a reference tool for estimating — always verify pipe slope, drain and vent sizing, water supply sizing, and gas pipe sizing against your local plumbing code (IPC or UPC as adopted locally) and a licensed professional before cutting, sizing, or installing. Gas piping in particular carries real safety consequences if undersized or misrouted.