EPANET
Gov-PublicVerified
The public-domain standard for water distribution modelling — hydraulics and water quality in pressurised networks.
OpenFlows HAMMER
ActiveBentley's transient analysis package — the commercial standard for surge studies on pumping mains.
by Bentley Systems
- Pricing
- Commercial
- License
- Proprietary
- Commercial use
- Permitted
- Ecosystem
- WaterGEMS, AutoCAD, MicroStation
- Platform
- Windows
About OpenFlows HAMMER
HAMMER is Bentley's hydraulic transient simulator: method-of-characteristics analysis of pump trips, valve operations and demand shocks, with a comprehensive surge-protection device library — surge tanks, air valves, bladder vessels, relief valves — and direct model exchange with WaterGEMS/WaterCAD.
Surge studies carry professional-liability weight, and HAMMER's validation pedigree and reviewer recognition are what you are paying for relative to open tools like TSNet. For rising mains, large pump stations and long transmission systems, it is one of the default commercial choices alongside AFT Impulse and Wanda.
Where it fits in the workflow
TerrainCatchmentRainfallRunoffRoutingHydraulicsMappingReporting
Alternatives to OpenFlows HAMMER
Ranked by the topics, categories and workflow stages they share with OpenFlows HAMMER.
OpenFlows WaterGEMS
Commercial
Bentley's flagship distribution suite — design, optimisation and criticality on EPANET-compatible hydraulics.
TSNet
Open Source
Open-source water hammer simulation in Python — method-of-characteristics transients on EPANET networks.
EPANET-MATLAB Toolkit
Open Source
Full MATLAB control of the EPANET engine — the standard bridge for control and optimisation research.
InfoWater Pro
Commercial
Autodesk's ArcGIS Pro-native distribution modelling — for utilities whose network data lives in Esri.
WNTR
Open SourceVerified
Sandia/EPA's Python toolkit for water network resilience — EPANET simulation plus disaster scenarios and metrics.