BaseCalc Plumbing Calculator vs Flowbox

BaseCalc Plumbing Calculator is a plumbing calculator for field math, worksheets, materials, and saved calculation history. Run pipe sizing, pressure drop, drainage, vent sizing, water heater, gas pipe, pump head, fixture unit, septic, and other plumbing calculator checks on site, then save the result for the job. 18 CALCULATORS FOR DAILY FIELD WORK • Pipe Velocity — velocity from GPM and nominal pipe size. • Flow Rate — GPM from velocity and nominal pipe size. • Pipe Sizing — minimum pipe size from GPM and max velocity. • Pressure Drop — Hazen-Williams pressure loss. • Drainage Sizing — fixture units to minimum drainage pipe diameter. • Vent Sizing — fixture units plus vent length to minimum vent diameter. • Water Heater — first-hour rating and recovery estimate. • Gas Pipe Sizing — BTU/hr and length to minimum gas pipe size. • Pump Head — total dynamic head from lift, friction, and pressure. • Pipe Volume — gallons of water in a given length of pipe. • Water Pressure — pressure and head conversion. • Pipe Expansion — thermal expansion length change. • Fixture Units — count common fixtures to total fixture units. • Water Meter Sizing — fixture units to meter size. • Irrigation Flow — zone GPM from heads and GPM per head. • Septic Tank — bedrooms and daily flow to minimum tank volume. • Grease Interceptor — fixture units or GPM to interceptor size. • Backflow Pressure — pressure loss across backflow preventer. EVERY RESULT IS EXPLAINED • Clear sizing messages and pass/fail where applicable. • The governing limit, final answer, and calculation breakdown. • Saved local history so you keep a job-site record. DEVICE-LOCAL FOR THE FIELD • Works offline by default. • No BaseCalc account or cloud sync. • Job contact, worksheet, setting, and calculation data stays on this device, protected by your device security. • There is no BaseCalc cloud option. • Dark and light themes with a high-contrast job-site interface. BaseCalc Plumbing is a professional reference tool. Always verify against current industry standards, manufacturer data, and local codes. The authority having jurisdiction has the final say. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

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.