EPANET-compatible hydraulic modeling · Web, Mac and mobile

One toolset.Three ways to work.

Open your EPANET model in the browser, on your Mac or on your phone. The same networks, in the app that fits where you are working.

Other apps by Transparent Blue →

3

Apps: Web, Mac, mobile

EPANET

Compatible

.inp

Opens on all three

app.flowanalyzer.io
FlowAnalyzer Web: an example network solved in the browser, nodes color-coded by pressure

FlowAnalyzer Web: an example network solved in the browser — 372 nodes, 24-hour extended-period simulation.

One toolset, three ways to work

Model in the browser, work natively on your Mac, take it to the field on your phone. Same EPANET networks.

FlowAnalyzer Web

In the browser · no install

  • Built-in hydraulic solver: extended-period simulation in your browser, checked against EPANET 2.2
  • Valve isolation: the valves to close, what goes out of service, and a PDF work order
  • N-1 criticality: pipes ranked by the demand left unserved
  • Pressure profiles: ground, hydraulic grade line and pressure at any hour
  • Scenarios (Pro): duplicate the network, edit the copy and see what differs; export .inp for EPANET Desktop

FlowAnalyzer Mac

Native for macOS

  • Leak model calibrated with your non-revenue water figure: a map of modeled leakage and the pipes losing the most
  • Compare what adjusting or adding a PRV would recover, and the lowest pressure each scenario leaves
  • Open an EPANET .inp, simulate, and read results on the map and in tables you can export to CSV
  • Edit the network, save to .inp, and share project files with FlowAnalyzer Web
  • Build a complete EPANET model in the app: layout, options, curves and controls

FlowAnalyzer Mobile

iOS and Android · works without internet

  • Open any EPANET .inp file, of any size, and simulate it with the EPANET 2.3.5 engine, steady state or extended period
  • See pressure and velocity in color across the network, hour by hour on an interactive timeline
  • Leave field notes with photos on the network, saved on the device
  • Export results to PDF and CSV, and the network as an .inp file (Pro, one-time purchase)
How It Works

From Your EPANET Model to Results

Import, simulate, analyze, and export — in the browser, on your Mac or on your phone.

1

Import

Load your EPANET .inp — or start from an example

2

Simulate

Run the network, steady state or extended period

3

Analyze

Read pressures and flows on the map and in tables

4

Export

Take the results out as CSV, and PDF where the app offers it

FlowAnalyzer Web

Solve, isolate, rank and profile — in your browser

Run your network with FlowAnalyzer's own engine, check it against EPANET, and know which valves to close and which pipes matter most.

  • Hydraulic solver built in: runs extended-period simulations in your browser with FlowAnalyzer's own engine (Rust compiled to WebAssembly), checked against EPANET 2.2 case by case, and an EPANET engine to verify any run.
  • Valve isolation: pick a pipe and get the valves to close, the links and nodes left out of service, the affected demand and a PDF work order.
  • N-1 criticality: closes each pipe in turn, re-solves the network and ranks pipes by the demand left unserved.
  • Pressure profiles: click pipes in series and see ground, hydraulic grade line and pressure at any hour; save, export CSV/PNG.
app.flowanalyzer.io
FlowAnalyzer Web solving an example network (EPANET Net1) in the browser with the FlowAnalyzer engine
Features

Complete Feature Set

Everything you need to manage your water network efficiently.

FlowAnalyzer Web

Browser-based platform

New

Pressure profiles

Click a pipe and the profile extends on its own along the main, stopping at every branch so you choose where it goes. Ground elevation, hydraulic grade line and pressure on a single chart, at any hour of the 24-hour run — and out to CSV or PNG.

Pressure profile chart: ground elevation, hydraulic grade line and pressure along a 26,370 ft path of EPANET's Net1, with the pump at the start and the hydraulic grade line falling along the flow
Pro

Scenarios to compare alternatives

Duplicate a network into a parent-child tree, edit the copy and open «What differs» for a line-by-line comparison of elements and sections like controls, rules and patterns. «Export .inp» gives a file EPANET 2.2 Desktop opens.

FlowAnalyzer Web on EPANET's Net1: a scenario tree with a child scenario «Night pattern added» and the «What differs» panel showing two added pattern lines and 27 sections unchanged
Import your EPANET .inp — or load the example model
Hydraulic solver built in: extended-period simulations in your browser with FlowAnalyzer's own engine (Rust compiled to WebAssembly), checked against EPANET 2.2 case by case, and an EPANET engine to verify any run
Valve isolation: the valves to close, the links and nodes left out of service, the affected demand and a PDF work order
N-1 criticality: closes each pipe in turn, re-solves the network and ranks pipes by the demand left unserved
Pressure profiles: click pipes in series and see ground, hydraulic grade line and pressure at any hour; save, export CSV/PNG
Scenarios to compare alternatives: duplicate a network into a parent-child tree, edit the copy and open «What differs» for a line-by-line comparison (elements and sections like controls, rules and patterns). «Export .inp» gives a file EPANET 2.2 Desktop opensPro
Edit the network without another app: «Draw», «Move», «Split pipe», patterns, valve types, controls and a new network from scratch. Undo with Ctrl+Z; everything is written to the .inp as EPANET does
Multi-select and batch edit: box, lasso or filter, then change diameter, demand or status on many elements in one step; one Ctrl+Z reverts it all
District Metered Areas (DMA): define sectors by inlets, boundaries, downstream trace or polygon, audit that they are closed, and compute their losses (ILI) with metered flowPro
Project notes: questions and answers pinned to a pipe, node or scenario, with status (Open / Answered / Closed) and thread; they travel in the project .json
Units as in your file: pressure in psi, kPa or m (with specific gravity) in results, profiles and ILI, checked against EPANET
Import warnings: if a file opens in FlowAnalyzer but EPANET 2.2 would reject it, the banner gives the exact line and the reason
FlowAnalyzer Mac

Water loss and pressure management, native on your Mac

Calibrate a leak model with your non-revenue water figure, see where the water is going and compare what pressure management would recover — then open, edit or build the EPANET model in the same app.

  • Leak model calibrated to your non-revenue water figure: a map of modeled leakage and a ranked list of the pipes losing the most.
  • Compare what adjusting or adding a PRV would recover (L/s, m³/month, money) and the lowest pressure each scenario leaves.
  • Open an EPANET .inp, simulate, and read pressures, flows and velocities on the map and in tables you can export to CSV; charts of each element's time series.
  • Edit the network (several elements at once, undo), save to .inp, and open or save project files shared with FlowAnalyzer Web.
  • Build a complete EPANET model in the app: draw the layout with the Pipe tool, set the network options (units, head loss formula, times), add curves for tanks and valves, and create controls.
Free on the Mac App Store · version 1.4
FlowAnalyzer Mac: modeled leakage by pipe on an example network (EPANET Net3) after calibrating to the non-revenue water figure
FlowAnalyzer Mac: an example network (EPANET Net3) simulated, junctions colored by pressureFlowAnalyzer Mac: simulation results table for the nodes of an example network (EPANET Net3), with CSV export
FlowAnalyzer Mobile: results of an example network on a phone, junctions colored by pressure
FlowAnalyzer Mobile

Field modeling, no internet needed

Open your EPANET network on your phone, simulate it and read pressures and velocities right where the pipe is — no signal needed.

  • Open any EPANET .inp file, of any size, and simulate it with the EPANET 2.3.5 engine, steady state or extended period.
  • See pressure and velocity in color across the network, hour by hour on an interactive timeline.
  • Leave field notes with photos on the network, saved on the device.
  • Export results to PDF and CSV, and the network as an .inp file (Pro, one-time purchase).
iOS and Android · works without internet · version 1.10.0 · EPANET is a trademark of the EPA
Access

The whole toolset, free

Every module in FlowAnalyzer Web is open right now — no license, no node limit, no credit card. If it earns its place in your work, you can help keep it that way.

no license required

FlowAnalyzer Web

The complete platform, in your browser. Your model never leaves your machine.

$0
  • Import your EPANET .inp — or load the example model
  • FlowAnalyzer's own engine (Rust/WASM) in your browser, with EPANET alongside to verify any run
  • Valve isolation with a PDF work order
  • N-1 criticality: pipes ranked by the demand left unserved
  • Pressure profiles along a path, with CSV/PNG export
Optional

Support FlowAnalyzer

FlowAnalyzer is built by a small team and given away because water utilities need the tools more than we need the toll booth. If it saved you a day of work, you can help pay for the next one.

  • Your support pays for engine work, servers and hours
  • It unlocks nothing — every module stays open for everyone
  • Tell us what you need next and it goes to the top of the list
  • Utilities, universities and consultancies: write to us about a joint pilot

Nothing on this page is behind a paywall. Supporting the project is a choice, never a requirement.

Open in your browser

Ready to transform your water operations?

Load your model and read the first result in the time it takes to make coffee.

No install, no account, no credit card

3

Apps: Web, Mac, mobile

EPANET

Compatible

.inp

Opens on all three