Aeration Systems
- Alita Industries, Inc.
- Anua
- Arcan Enterprises
- ATER Company
- Delta Treatment Systems, LLC
- Enviro-Aire (by Infiltrator, formerly Delta Treatment Systems)
- Geomatrix Systems, LLC
- Jet Inc.
- Kistner Concrete Products, Inc.
- MST Manufacturing Inc. DBA MicroSepTec
- Norweco, Inc.
- Wholesale Septic Supply
- Wieser Concrete