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OpenFlows SewerCAD

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OpenFlows SewerCAD

Sanitary sewers design and analysis software

Effortless sanitary sewer design and analysis

Save time, eliminate risk, and improve project performance that enable digital collaboration, automate workflows, and manage information exchanges within your connected data environment.


OpenFlows SewerCAD is an easy-to-use sanitary sewer modeling and design application to design, analyze, and plan your wastewater collection systems. You can model both pressurized force mains and gravity hydraulics with ease using steady-state analysis with various standard peaking factors, as well as extended period simulations.

Seamless Tools And Background Support

Deploy as a stand-alone application or work directly from within OpenRoads , OpenSite , OpenRail , or AutoCAD. And allocate sewer loads based on a variety of GIS sources. 

Analyze Under Extreme Flow Conditions

Use a robust, gradually varied, standard-step algorithm to solve for a variety of conditions.

Design Gravity Piping And Structures

Automatic gravity piping and structure design. Determine the most cost-effective pipe sizes and invert elevations, avoiding unnecessary pipe trench excavation.

Comprehensive Scenario Management

Enjoy full control to configure, run, evaluate, visualize and compare an unlimited number of what-if scenarios within a single file.

OpenFlows SewerCAD is a subset of OpenFlows SewerGEMS.

*Prices vary per region. For more options, see licensing and subscriptions section.


Designing new sewer systems with OpenFlows SewerCAD

Focused on sanitation, environment, and urban infrastructure, the father/son team at TSA – Tecnologia em Saneamento Ambiental works hard to bring a better quality of life to underserved communities by designing new sewer networks with OpenFlows SewerCAD.

User Quote

“SewerCAD was instrumental in reviewing the old trunk sewer and identifying the optimum method of rehabilitation, while SewerGEMS’ modeling features contributed to a significant reduction in labor-intensive work”

— Sanjay Guleria, Project Managers, NJS Engineers India


OpenFlows Software Resources

Frequently Asked Questions

SewerCAD is a sanitary sewer modeling and design software that can be used to design, analyze, and plan wastewater collection systems. You can model pressurized force mains and gravity hydraulics with ease, using steady-state analysis with various standard peaking factors, and extended-period simulations. You can design both new systems and rehabilitate existing sanitary sewers with SewerCAD.

Yes, you can analyze pressure or free surface flow conditions using a robust gradually varied, standard-step algorithm in SewerCAD for solving subcritical, critical, and supercritical conditions, and complex composite profiles. The steady-state simulation analyzes the system under extreme flow conditions. Automated design features are available with a steady-state analysis type to find cost-effective sewer designs. The extended period simulations (EPS) allow modelers to visualize how the system behaves over time. Results can be animated through time to locate hydraulic jumps and surcharging sections.

SewerGEMS is a superset of SewerCAD. SewerGEMS includes a standalone version plus the ability to integrate with three platforms MicroStation, AutoCAD, and ArcGIS. SewerGEMS’ full GIS, CAD, and SCADA interoperability enables the cost-effective sharing and flow of information between utilities’ design, engineering, GIS, and operation departments, and their consultants.

SewerCAD has a gradually varied flow engine for steady-state and extended period simulations for system design and rehabilitation that analyzes sanitary sewer networks under peak flow conditions with convex routing hydraulics. SewerGEMS uses a fully dynamic engine to help you accurately model looped networks, flow splits, overflows, and storage capacity. Learn more about SewerGEMS.

Integration with AutoCAD is not included with a SewerCAD Virtuoso Subscription. However, integration with AutoCAD is available with a SewerCAD for AutoCAD perpetual license. For more information or to purchase a perpetual license, please contact our sales team.

The LoadBuilder module included in SewerCAD helps you allocate sewer loads based on a variety of GIS-based sources such as consumer water use billing data, area-wide flow measurement, or polygons with known population or land use. Sewer loading in SewerCAD also can be applied as user-defined hydrographs, pattern-based loads, and unit loads. You can use customizable unit load libraries to estimate sanitary flows based on contributing population, service area, total dry weather discharge, or your own customized loading types. Loads can be allocated individually to property connection elements, or collect to manholes and other node elements.

SewerCAD also includes numerous pre-defined extreme flow factor formulas and tables, including Babbit, Harmon, Ten State, and Federov’s – or lets you enter your own formulas and tables. SewerCAD determines infiltration in gravity pipes, based on pipe length, length diameter, surface area, count value, or user-defined data. SewerCAD can also use multiple flow patterns or flow hydrographs for EPS. The sanitary load control center and inflow control center make it easy to globally edit or edit a filtered set of elements.

By using the constraint-based design features in SewerCAD, you can automatically design gravity piping and structures. The design is flexible enough to allow you to specify the elements to be designed, from a single pipe size to the entire system, or anything in between, by simply entering your design restrictions: minimum and maximum velocities, covers, slopes, and tractive stress; pipe and manhole matching offsets; and allow (or not) drop structures. SewerCAD will automatically determine cost-effective pipe sizes and invert elevations, avoiding unnecessary pipe trench excavation.

The SewerCAD Scenario Management Center gives you full control to configure, run, evaluate, visualize, and compare an unlimited number of what-if scenarios within a single file. You can easily make decisions by comparing unlimited scenarios, analyzing rehabilitation alternatives for multiple planning horizons, and evaluating pump operation strategies, or overflow scenarios with varying future wastewater flows.

The price of OpenFlows SewerCAD varies per region. While there are various types of licensing available, a common choice is the 12-month practitioner license offered through Bentley’s eStore. When you purchase through the eStore, you get a Virtuoso Subscription. This means you get the software and “Keys” (tokens) to redeem for customizable training, mentoring, and consulting services.

Refer to the ‘Installation Requirements’ section of the SewerCAD ReadMe file.

Platform pre-requirements

SewerCAD runs without platform restrictions as a stand-alone application. It can also run from within MicroStation, OpenRoads Designer, OpenRail Designer, and OpenSite Designer. AutoCAD integration is not supported with a Virtuoso Subscription of SewerCAD. The requirements are also available in the SewerCAD ReadMe file.

For the most up-to-date system requirements, visit Bentley Communities.

Licensing and Subscription options

Choose What is Right for You

One-year license with training

Virtuoso Subscription – A popular choice for small and medium-sized businesses

Get access to software that comes with training – fast! Bentley’s eStore, Virtuosity, offers a convenient way to lease a 12-month license of Bentley software for a low, upfront cost. Every online purchase through Virtuosity comes as a Virtuoso Subscription that includes training and auto-renewals.

With no contract required, it’s easy to get started quickly.

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One-time purchase with support

Perpetual License with SELECT

A perpetual license of Bentley software is a one-time purchase, with a yearly maintenance subscription, called SELECT. This includes 24/7/365 technical support, learning resources, and the ability to exchange licenses for other software once a year. With SELECT, you will benefit from:

  • License pooling, so you can access your software from multiple computers.
  • Access additional Bentley software with Term Licenses, which allow you to pay for what you use without the upfront cost of purchasing a perpetual license.

Annual renewal quotes are delivered directly to your inbox, and our experienced Renewal Representatives are available to answer your questions and guide you through any changes you’d like to make.

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Enterprise Organizations

We’ve got your back

For larger organizations with in-depth requirements, we offer plans to provide global pricing and access to our comprehensive portfolio of solutions and success plan services. Contact us about how to get access to software, global best practices, implementation services, training, and technical support to help your organization realize its full potential while addressing your unique needs.

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Best-Selling Water Resources Textbook

Computer Applications in Hydraulic Engineering

This fully updated 9th edition textbook is available for download! Ideal for engineers and students in hydraulics and hydrology, offering theory and real-world applications with problem-solving and modeling exercises featuring OpenFlows WaterGEMS, HAMMER, SewerGEMS, SewerCAD, PondPack, StormCAD, FlowMaster and CulvertMaster.

model pressurized force mains and gravity hydraulics with ease

Celebrate Infrastructure Delivery & Performance Excellence

The 2024 Year in Infrastructure
and Going Digital Awards

Nominate a project for the most prestigious awards in infrastructure! Extended deadline to enter is April 29th.