Press Releases

Contech Engineered Solutions Releases New Hydrodynamic Separator Design Tool
December 04, 2019

West Chester, OH (December 4, 2019)

Contech Engineered Solutions recently launched a new online tool for designing hydrodynamic separators.  The Design Your Own Hydrodynamic Separator (DYOHDS®) tool helps to automate the design process for hydrodynamic separators, providing calculations, drawings and specifications that engineers can use in creating project plans. The free tool is available at

The DYOHDS tool allows users to enter site-specific information that is used to ensure the recommended HDS system will comply with site constraints and treatment requirements. The tool also offers sizing methodology options based on the location of the project, including sizing based on water quality flow rate or sizing based on net annual removal. 

When the design is finished, users are provided a site-specific design that includes a sizing summary, standard drawing, and specification. Users of the tool can design multiple systems for each project and all project information can be saved for future use. 

“The ability of the tool to size HDS systems based on different sizing methodologies means this tool can design solutions in compliance with local stormwater regulations,” said Elaine Thomas, Hydrodynamic Separation Product Manager at Contech. “It can also significantly reduce the amount of time an engineer will need to design an HDS system.”

The new DYOHDS tool joins Contech’s other stormwater design tool, the Design Your Own Detention System Tool, as a free resource for engineers to quickly and easily prepare designs and supporting documents for estimates/project meetings