Code Snap vs DuctWheel

An all-in-one plumbing reference built for professionals who need fast, reliable code data on the job. Code Snap combines UPC & IPC tables, fitting take-offs, and water line sizing into a single streamlined app designed for real-world use in the field. Quickly access the plumbing data you rely on without digging through books or PDFs. Whether you’re sizing pipe, laying out a system, or verifying clearances, Code Snap provides practical, jobsite-ready reference you can trust. Subscriptions Code Snap offers multiple subscription options, including individual feature access or a single subscription that unlocks all tools. Available options include: • UPC & IPC – Core plumbing tables, data, and code references • Main Line – UPC & IPC water line sizing calculator • Fitting Take Off – DWV & H2O fitting take-off dimensions • Unlock All – Access to all Code Snap features A subscription is required to unlock full access to app content. Features • Quick access to core plumbing tables • Toggle instantly between UPC & IPC • Water main and branch sizing calculations • DWV and H2O fitting take-offs • Interactive instant results • Color-coded per national standards • Editable take-off values • One-handed, field-optimized interface • Share code and take off values What’s Included • Waste, water, and hot water tank sizing • Grease interceptor sizing • Meter, main, vent, and trap arm sizing • Pipe bracing requirements • Fuel gas BTU loads and pipe sizing • Medical gas sizing, codes, and pressures (UPC only) • Roof drain sizing (UPC only) • ADA restroom diagrams and requirements • Interactive wet venting diagrams (vertical and horizontal) Fitting Libraries • No-Hub Cast Iron • ABS & PVC Plastic • Pro-Press Copper • DWV Sweat fittings • H2O Sweat fittings • 90s, 45s, tees, flanges, wyes, combination fittings, fixture crosses, and more Important Note Code Snap is an independent reference tool created for plumbers and plumbing professionals, based on publicly available data and established code principles. It is not affiliated with or endorsed by IAPMO, ICC, or any regulatory authority. Always verify requirements with the Authority Having Jurisdiction (AHJ) for your project. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

DuctWheel sizes HVAC ductwork the way a mechanical designer would — by solving the actual duct friction physics, not by eyeballing a chart. Enter your airflow (CFM) and a target friction rate, and DuctWheel solves for the round duct diameter using the Darcy-Weisbach equation with a Swamee-Jain friction-factor approximation (the same physics behind the SMACNA/ASHRAE duct friction charts). Need a rectangular duct instead? Convert between round and rectangular sizes using the standard ASHRAE equal-friction equivalent-diameter formula, in either direction. Why DuctWheel: - Real duct physics (Darcy-Weisbach + Swamee-Jain), not a static lookup chart - Round-to-rectangular and rectangular-to-round conversion - Galvanized and flex duct roughness presets, or enter your own - Velocity flagged automatically when it's high enough to cause noise - Save calculations to compare runs and jobs - Works completely offline - no account, no ads Reference tool note: this app is a design aid using standard published duct-friction methodology. Always check results against your project specs, local code, or a licensed mechanical engineer for anything code-critical. One-time purchase, no subscription. No data collected.