



Slotted Bucket C3 Granule Filter 70 µm – Compact Solution | Winkler
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Slotted Bucket C3 Retention System for Plastic Granules – 70 µm Complete Set
Precise Granule Retention for Compact Special Gully Pots (DIN 4052)
In many industrial facilities, compact drainage points are found alongside standard road drains. Our Slotted Bucket C3 Set with 70 µm filter fineness was developed specifically for these special gully pots (Form C according to DIN 4052). It offers a highly effective solution to legally implement the requirements of EU Regulation 2025/2365 even at narrow or space-critical drainage points. This model is a central component of our specialized retention systems for plastic granules.
The C3 system closes the security gap in areas where standard buckets with a 450 mm diameter are too large. This makes it an essential component for seamless retention management within the framework of Operation Clean Sweep audits.
Areas of Application: Compact Industrial Drains
The C3 model (Ø 300 mm) is the ideal choice for specialized infrastructures on company premises, especially in industries such as Chemicals & Raw Materials and Energy & Environment:
- Narrow drainage channels near production.
- Special gully pots in warehouses and loading stations in the Transport & Logistics sector.
- Compact yard drains with small cross-sections.
- Point drainage in Civil Engineering & Landscaping projects.
- Courtyard drainage in the plastics processing industry.
Maximum Tightness Thanks to the Winkler Collar System
Even with smaller diameters, safety must not be compromised. Our C3 system guarantees a 100% mechanical barrier without bypass:
- Precision Manufacturing: The 70 µm high-performance fabric is dimensionally stable and cut to the exact measurements of the C3 slotted bucket.
- Integrated Filter Collar: The filter is precisely placed over the rim of the bucket, reliably sealing the transition to the gully pot.
- Industrial Drawstring: The fixation is done with a robust drawstring. Since there is no overflow, all water is forced through the fine filter fabric to prevent granule loss (microplastics).
Comparison of Retention System Models
Use the following overview to find the right system for your existing infrastructure:
| Model | Application Area | Bucket Type (DIN 4052) | Special Feature |
|---|---|---|---|
| A4 | Road drain (high) | Form A (Ø 450 mm) | Maximum capacity |
| B1 | Road drain (flat) | Form B (Ø 450 mm) | Low installation depth |
| C3 | Special gully pot | Form C (Ø 300 mm) | Compact industrial drains |
| D1 | Compact drain | Form D (Ø 300 mm) | Flat & narrow |
| Yard bucket | Yard & point drainage | Square / Round small | Areas near production |
| Replacement filter | All models | Universal fabric | Individual & flexible retrofit |
Technical Details: Slotted Bucket C3 Set
| Scope of delivery | 1x Slotted bucket galvanized (Form C3) incl. mounted 70 µm filter |
| Filter material | High-performance polymer (high-strength & media-resistant) |
| Filter fineness | 70 µm (Micron) – reliable retention of pellets and abrasion |
| Diameter | Suitable for gully pots Form C (Ø 300 mm) |
| Compliance | Complies with EU 2025/2365 & Operation Clean Sweep Standards |
Note: As we individually equip the bucket systems for your industrial needs, please allow for the appropriate delivery time for industrial production.
Consultation from the Specialist in Industrial Filtration
Do you need help categorizing your gully pots? Our experts for filter technology consultation or comprehensive industrial filter technology consultation will be happy to assist you in optimally securing your compact drainage systems.
FAQ – Slotted Bucket C3 Granulate Retention System 70 µm
Answers for securing compact special gullies (Type C) in industrial settings.







