Infiltration Shaft Filter Bag for Rainwater Filtration & Soakaways (DN1000–DN2500)

Efficient Surface Drainage and Sustainable Groundwater Protection

Sealed surfaces such as car parks, industrial sites and logistics centres collect a wide range of pollutants: tyre wear, microplastics, fine particulates, leaves and litter. Without pre-treatment, these particles pass straight into the ground or downstream soakaway systems.

The WINKLER infiltration shaft filter bag is a highly effective, cost-efficient solution for rainwater filtration. It reliably removes solids from stormwater before it soaks into the ground – with no extensive modifications to your existing shaft system.

You'll find further solutions for municipal applications in our Filtration for Transport & Logistics – road drainage & rainwater range.

Two-Layer Filter System for Maximum Cleaning Performance

The filter system consists of two matched layers of polypropylene needle felt, combining coarse and fine filtration in a single product:

• Inner filter (coarse structure): Retains leaves, litter and coarse sediment
• Outer filter (fine structure): Removes the finest particles down to 80 µm

This combination extends service life and secures the shaft's long-term infiltration performance.

DWA-Compliant Rainwater Treatment

The filter bag achieves a pass-through value of 0.5 in accordance with DWA-M 153 and DWA-A 138 (German technical standards). This helps municipalities, planners and industrial companies meet applicable water-management requirements.

It's particularly well suited to projects in:

• Filtration for Construction
• Civil Engineering & Landscaping
• Energy & the Environment
• Agriculture
• Home, Garden & Pond

Easy Installation and Maintenance (DN1000 – DN2500)

Thanks to sturdy loops around the rim, the filter bag can be fitted quickly and securely in the infiltration shaft.

• Fast changes: Lift out via the loops and a pull rope – no special tools required
• Precise fit: Available for DN1000, DN1500, DN2000, DN2500
• Custom sizes: Made to order on request

Matching Accessories for Secure Installation

For a permanently stable, secure fit, we recommend the specially matched infiltration shaft filter bag mounting kit. The system enables fast initial installation and especially efficient filter changes via carabiner hooks and heavy-duty anchors. The galvanised components stay in the shaft permanently, making maintenance significantly easier.

Your Benefits at a Glance

• High filtration performance: Retains fine particles down to 80 µm
• Microplastic reduction: Effective protection for soil and groundwater
• Extremely robust: Tear-resistant, thermofixed polypropylene (PP)
• Cost-effective: Disposable system with no structural retrofitting
• Ready to ship: Short delivery time for ongoing projects

Technical Details

Expert Advice for Your Rainwater Soakaway

Need a custom design for your construction or infrastructure project? Use our filtration product advice service. We'll help you implement a compliant, cost-effective drainage solution.