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Stormwater Infiltration Filter Bag for Rainwater Filtration & Drainage Systems (DN1000–DN2500)
Efficient Surface Water Drainage and Sustainable Groundwater Protection
Sealed surfaces such as parking lots, industrial sites and logistics centers accumulate large amounts of pollutants including tire wear particles, microplastics, fine dust, leaves and debris. Without effective pre-filtration, these contaminants enter the soil directly or overload downstream stormwater infiltration systems.
The WINKLER stormwater infiltration filter bag is a highly efficient and cost-effective solution for rainwater filtration. It reliably removes suspended solids and pollutants from stormwater before infiltration into the ground – without requiring expensive modifications to existing shaft systems.
Discover additional solutions for municipal and infrastructure projects in our category Transportation & Logistics Filtration Solutions – Stormwater & Drainage Systems.
Dual-Layer Filtration System for Maximum Cleaning Performance
The filtration system consists of two coordinated layers of polypropylene needle felt, combining coarse and fine filtration in a single product:
- Inner Filter Layer (Coarse Structure): Captures leaves, debris and coarse sediments
- Outer Filter Layer (Fine Structure): Retains fine particles down to 80 microns
This dual-layer construction increases the service life of the filter bag while maintaining the long-term infiltration performance of the drainage shaft.
DWA-Compliant Stormwater Treatment
The filter bag achieves a pass-through value of 0.5 according to DWA-M 153 and DWA-A 138. This helps municipalities, engineering firms and industrial operators comply with modern stormwater management and environmental protection standards.
It is particularly suitable for projects in:
- Construction Filtration Solutions
- Civil Engineering & Landscaping
- Environmental & Energy Applications
- Agriculture
- Home, Garden & Pond
Easy Installation and Maintenance (DN1000 – DN2500)
Thanks to its reinforced perimeter loops, the filter bag can be installed quickly and securely inside infiltration shafts.
- Fast Replacement: Easy removal via lifting loops and pull rope – no special tools required
- Perfect Fit: Available for DN1000, DN1500, DN2000 and DN2500 shafts
- Custom Sizes Available: Tailor-made manufacturing upon request
Matching Accessories for Secure Installation
For permanently secure installation, we recommend the specially designed mounting kit for infiltration shaft filter bags.
The system enables fast initial installation and highly efficient filter replacement using carabiner hooks and heavy-duty anchors. The galvanized components remain permanently installed inside the shaft, significantly simplifying maintenance procedures.
Your Advantages at a Glance
- High Filtration Efficiency: Captures fine particles down to 80 microns
- Microplastic Reduction: Effective protection of soil and groundwater
- Extremely Durable: Tear-resistant thermofixed polypropylene (PP)
- Cost-Efficient: Disposable filtration system without structural modifications
- Fast Availability: Short delivery times for ongoing infrastructure projects
Technical Specifications
| Material | Dual-layer polypropylene needle felt |
| Dimensions | DN1000, DN1500, DN2000, DN2500 or custom-made |
| Material Weight | 130 + 200 g/m² (total 330 g/m²) |
| Air Permeability | 1200 l*dm⁻²*min⁻¹ |
| Pass-Through Value | 0.5 (DWA-M 153 / DWA-A 138) |
| Delivery Time | 1–2 business days |
Expert Consulting for Stormwater Infiltration Systems
Need a customized solution for your construction or infrastructure project? Use our filtration consulting service. We support you in implementing efficient, compliant and economical stormwater drainage solutions.
FAQ – Soakaway filter bag for rainwater and infiltration
Frequently asked questions about rainwater filtration in the soakaway
The infiltration shaft filter bag ensures that solids are reliably removed from rainwater before the water enters trenches or infiltration systems. This keeps infiltration systems functioning properly in the long term and reduces maintenance and siltation.
What is a seepage pit filter bag used for?
Typical areas of application include parking lots, industrial areas, commercial areas and paved courtyards.
What particles does the seepage pit filter bag retain?
This improves water quality and protects infiltration trenches and seepage systems from clogging.
For which shaft sizes is the filter bag suitable?
A precisely fitting design ensures a secure hold and even flow.
How is a seepage pit filter bag installed?
To change the filter bag, simply lift it out with a rope or hook and replace it.
How often does a seepage pit filter bag need to be changed?
Changing the drain in a timely manner ensures that the infiltration capacity is maintained and that no deposits form in the shaft.
