Hydro Storm Water Quality Unit Granted Indianapolis Approval

Hydro Intl.’s First Defense vortex separator has received approval from the City of Indianapolis for use as a storm water quality unit.

“Hydro’s Downstream Defender advanced vortex separator has been approved by the city for nearly nine years enabling it to be specified throughout the state. Now engineers can also leverage the space-saving advantages of the First Defense for sites with small to medium-sized storm water quality runoff rates," said Lisa Lemont, business development manager of Hydro’s U.S. storm water div. 

Following third party testing and verification, the First Defense is one of only a few devices approved for use in an online configuration in Indianapolis. The internal bypass arrangement of the First Defense can accommodate higher flow rates without the risk of washing out the sediments and pollutants captured in the device, or causing surface water flooding.

“The city’s requirement for storm water devices to meet a minimum 75-year design life was a particularly important—underground storm water devices need to be robust to resist degradation in the extreme temperatures experienced in Indiana," Lemont said.

Suitable for both new development and retrofit sites, First Defense is a vortex separator that can be fitted into standard 4-ft and 6-ft manholes and configured into an existing drainage line. Its design prevents pollutant washout at up to 500% of its treatment flow, which can eliminate the need to specify more offline arrangements that use separate junction manholes. 

Source: Hydro Intl.