PRETX-LT™
Biofiltration Pretreatment
Protecting Biofiltration Systems at the Inlet
Capture sediment, debris, and floatables before they impact downstream treatment performance.
Built to Protect the Assets Behind the Inlet
PRETX-LT is a modular, inlet-based pretreatment solution designed to intercept trash, debris, floatables, and sediment before runoff enters rain gardens, bioswales, bioretention systems, and other green infrastructure.
By capturing pollutants at the point of entry, PRETX-LT helps preserve infiltration performance, reduce maintenance demands, and extend the service life of downstream treatment systems.
Why PRETX-LT?
Extends Biofilter Life
Helps maintain infiltration rates and system performance.
Reduces Maintenance
Captures debris and sediment before it reaches the biofilter.
Protects Infiltration
Helps prevent premature clogging of media and infiltration beds.
Retrofit or New Build
Designed for installation in existing or new projects.
Long-Term BMP Performance
Supports water quality goals and long-term system outcomes.
Engineered Multi-Stage Pretreatment
PRETX-LT uses multiple treatment mechanisms in a compact, inlet-based system designed to remove debris, floatables, and sediment before runoff enters downstream treatment infrastructure.
- Debris Grate – Screens out leaves, trash, and large debris.
- Floatable Baffle – Deflects and traps floatables and lightweight materials.
- Sediment Weir – Promotes settling of suspended solids.
- Discharge to Biofilter – Pretreated water flows to the biofiltration system for final treatment and infiltration.
Protect Your Investment
Without Pretreatment
- Media clogging
- Reduced infiltration
- Increased maintenance
- Higher lifecycle costs
- Shortened system life
VS.
With PRETX-LT
- Cleaner biofilters
- Maintained infiltration
- Reduced maintenance costs
- Lower lifecycle costs
- Extended system life
Key Specifications
| Construction | Precast concrete |
|---|---|
| Grating | Galvanized steel |
| Installation | Retrofit or new construction |
| Maintenance | Vacuum truck accessible |
| Treatment | Floatables, sediment, debris |
| Function | Pretreats water quality flows and bypasses larger events |
| Service Life | Engineered for long-term performance |
Typical Applications
- Rain gardens
- Bioswales
- Bioretention systems
- Commercial developments
- Municipal infrastructure
- Green infrastructure retrofit projects
The Convergent Difference
Decades of experience. Practical innovation. Real-world solutions that perform.
- Proven engineering
- Focused on water quality
- Committed to performance
Protect Biofiltration Performance Before Runoff Reaches the Media
PRETX-LT helps engineers, owners, and municipalities reduce maintenance demands while improving long-term green infrastructure performance.