Innovative online sizing calculator for stormwater treatment launched

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May 27, 2014 -- Hydro International, a supplier of water, wastewater and stormwater treatment and control technologies, recently released an online sizing tool for its Downstream Defender®, making designing in high-performance, low headloss stormwater treatment simpler and quicker for drainage design consultants.

Called the Downstream Defender Sizing Calculator, the technology empowers designers to select and specify the most appropriate Downstream Defender model size needed with the option to generate product drawings, save project designs, and submit projects for design reviews and price estimates.

The Downstream Defender is a high-efficiency manhole-based hydrodynamic vortex separator that offers particulate stormwater pollutant removal in a small footprint with minimal headlosses. Engineers can size Downstream Defender models in the software according to many various city and state regulatory agency requirements.

Sample screen shot of Hydro International's Downstream Defender Sizing Calculator

The calculator takes the user step-by-step through the selection and sizing process with options to size by regulatory agency, target particulate pollution by particle size, or simply by the required Downstream Defender model, if known. The software also makes suggestions for the suitability of either continuous online or offline drainage layout options. The designer can then generate detail drawings with standard or site-specific elevations and a written specification for ease of use in project proposals.

A simple log-in procedure for the Downstream Defender Sizing Calculator on Hydro's website (click here) sets up a secure account resource unique to each engineer, allowing the build-up of a library of design iterations to be stored for past and current projects. It is easy to customize the inlet and/or outlet pipe size, the elevations of the inlet and outlet pipes, and the manhole cover based on site-specific topography.

Editing is rapid so that project details can be added and amended as a stormwater site design progresses. Once a design is complete, users may opt to submit their design for a free review and price estimate by Hydro's Technical Support Team.

See also:

"Hydro International earns Exporter of the Year Award for South American growth"

"Hydro International product approved for use by NY State Department of Environmental Conservation"

About Hydro International

Hydro International provides cost‑effective solutions for controlling the quantity and improving the quality of water with minimal maintenance. Developed over more than 30 years of research and development, many of Hydro's award-winning solutions in the water, wastewater and stormwater sectors are based on sustainable vortex technologies. Hydro Americas' Stormwater division is headquartered in Portland, Maine. For more information, visit


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