Pipe Sizer vs HydroSewer

PipeSizer helps you quickly choose the right pipe diameter for water systems — for both pressure and gravity flow. PRESSURE PIPE SIZING • Size pipes from a target flow rate. • Set your maximum friction rate and velocity limits. • Calculations based on the Hazen-Williams equation. GRAVITY PIPE SIZING • Size pipes from a target flow rate. • Evaluate flow capacity and velocity under gravity conditions. • Calculations based on the Manning equation. KEY FEATURES • Automatic recommended pipe size based on your limits. • Multiple pipe materials with built-in coefficients (more added over time). • Works in both SI and Imperial (I-P) units. • Designed for engineers, plumbers, and irrigation/drainage design workflows. Feedback is welcome — it directly shapes upcoming updates.

HydroSewer is a professional stormwater and sewer network analysis tool powered by the EPA SWMM 5.2 engine. Design, analyze, and simulate drainage networks directly from your phone or tablet. KEY FEATURES - Import standard EPA SWMM input files (.inp) to work with models from your existing workflows - Run hydraulic simulations using the real EPA SWMM 5.2 engine - no cloud required, everything runs on-device - Visualize your drainage network with an interactive map: zoom, pan, and select elements - Step through simulation results over time to see how your network performs under storm conditions - Inspect and edit node, link, and subcatchment properties - View computed values: water depth at nodes, flow rate in conduits, velocity, and more FIELD NOTES - Tap any manhole, outfall, or pipe and attach a note, with photos, tied to that exact element - Flag as-built discrepancies, log observations, or leave a "check this" for the office - Mark notes open or resolved; every element with an open note is highlighted on the map - See all your open notes in one project-wide list and jump straight to each element - Notes and photos are saved in your project and never touch the .inp file FREE, WITH NO LIMITS Model networks of any size and add unlimited field notes and photos, free. HydroSewer Pro is an optional one-time purchase that adds a shareable PDF report of your open field notes, for handing off to your team or client. Everything else stays free. BUILT FOR ENGINEERS HydroSewer brings the power of EPA SWMM to your mobile device. Whether you are in the office reviewing a design or in the field verifying a network, you can load a standard .inp file and run the simulation on your device. Supported elements include junctions, outfalls, conduits, pumps, weirs, orifices, subcatchments, and rain gages. ABOUT EPA SWMM EPA SWMM (Storm Water Management Model) is the industry-standard software developed by the U.S. Environmental Protection Agency for planning, analysis, and design of stormwater runoff, combined and sanitary sewers, and other drainage systems. IMPORTANT HydroSewer is an independent engineering tool. Results are computed by the EPA SWMM 5 engine and must be reviewed and verified by a qualified, responsible engineer before any design, construction, permitting, or other professional use. HydroSewer does not certify or guarantee compliance with any code, standard, or regulation, and is provided "AS IS" without warranty of any kind. HydroSewer is not affiliated with, endorsed by, or sponsored by the U.S. Environmental Protection Agency (EPA). References to EPA and SWMM are used solely to identify the simulation engine.