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Retention / Detention Systems

Storm water retention and detention systems are present in the industry as either above ground ponds or as subsurface piping. The former is the least expensive method, though it is the most inefficient use of developable land, is prone to early siltation and clogging, and poses long term aesthetic problems such as insect breeding, weed growth and odor and refuse issues. By comparison, subsurface retention detention systems use available land efficiently while introducing low maintenance costs and posing little or no aesthetic problems.

ADS has taken the lead in the retention/detention design and installation. From specially designed systems that hold more than a million gallons under a huge shopping center, to systems that fit in the smallest of footprints, ADS can help you meet stringent EPA requirements for management of storm water.

Retention/Detention Calculator
Design calculator to assist you in creating your next pipe storm water management system.
(MS Excel)

If problems occur while opening the MS EXCEL file, try saving the file first, then opening.

To ensure accuracy, always check to see that you have the most current version of the Retention/Detention Calculator from the website.

ADS StormTech Design Tool

This free online ADS StormTech Design Tool will help users design conceptual layouts and cost estimates for today’s fast paced business environment.

This new tool will provide Project Data Reports and Plan Layouts quickly in both PDF and CAD format and will help designers in their evaluation efforts and response times.


Learn more about the features and benefits of this New design tool.

ADS StormTech Design Tool Step by Step Video Instructions

ADS Design Pro Retention/Detention Design Tool

An on-line program for designing storm water retention/detention systems including pipe or storm water chambers which can be shared with others and also saved for future reference.


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HydroCAD Wizard

ADS N-12 Pipe can be easily modeled with the HydroCAD Stormwater Modeling System, allowing simplified calculation of the pipe's storage and infiltration behavior. The HydroCAD Chamber Wizard also performs automated system layouts, and simplifies the process of designing a pipe system meeting specific storage and footprint requirements.

Click here for details.

ADS Retention / Detention Systems Products

  • N-12® Pipe Retention / Detention Systems
    The N-12 pipe underground retention/ detention system utilizes subsurface pipe that detains storm water and releases it either through a controlled outlet or holds it until the surrounding soil can accept it.
  • StormTech® Chambers
    StormTech chambers are carefully engineered to meet the demands of subsurface storm water management applications. StormTech chambers provide optimal underground retention and detention solutions for stormwater runoff
    Offering a minimum recycled content of 40%, ADS MEGA GREEN HDPE pipe is the developer's and designer's choice for "green projects", helping you meet LEED requirements.