ADS LLC (, formerly ADS Corporation, acquired Severn Trent Pipeline Services, a division of Severn Trent Services ( With regional offices located throughout the United States, Severn Trent Pipeline Services provides specialized water distribution and sewer collection system analysis, pipeline and structure rehabilitation, and Hydra-Stop line stopping and tapping equipment, insertion valves, and services.

ADS LLC designs and manufactures flow measurement equipment and software. It provides field inspection and field services for flow monitoring and sewer system evaluation studies (SSES). With two divisions, ADS Environmental Services and Accusonic Technologies, ADS LLC has conducted over 5000 flow measurement projects in its 31-year history and provides products and services to customers in over 40 countries.

The addition of Severn Trent Pipeline Services is expected to enable ADS to provide expanded field services and product offerings to customers in the water and wastewater treatment space.