Why Choose Our Twin Rainwater Filter?
At Shrewd Industrial Ltd, we specialise in reliable water filtration solutions that support sustainable drainage systems (SuDS) and rainwater recycling.
- Designed for large-scale rainwater collection systems (up to 800m²)
- Advanced dual-stage filtration technology for maximum efficiency
- Supports water conservation and reduced utility costs
- Lightweight and easy to install (single-person handling)
- Suitable for year-round use in all UK weather conditions
- Flexible installation: underground chamber or wall-mounted
- Ideal for commercial buildings, warehouses, and industrial sites
Installation Options
The Twin Rainwater Filter is designed for flexible installation to suit your project:
- Mounted externally on a wall in a frost-protected area
This makes it a versatile solution for new builds, retrofits, and commercial developments.
How the Rainwater Twin Filter System Works
Our Twin Filter uses a two-stage filtration process to ensure clean, reusable water:
- Water Intake & Distribution
Rainwater enters the system and is evenly distributed across two cascade filters. - Primary Filtration
Larger debris such as leaves and particles are separated and directed into the sewer. - Secondary Fine Filtration
A precision 0.65mm mesh filter removes finer contaminants, ensuring high-quality filtered rainwater. - Clean Water Collection
Filtered water is collected in a central chamber and transferred into your rainwater storage tank. - Waste Disposal
All waste materials are efficiently discharged into the sewer system.
Maintenance & Performance
To maintain optimal performance and extend product lifespan, we recommend cleaning the filter 1–2 times per year, depending on environmental conditions and debris levels.
The system’s self-cleaning inclined filter design helps minimise maintenance while ensuring consistent filtration efficiency.
Applications
This rainwater filtration system is ideal for:
- Commercial buildings
- Industrial facilities
- Agricultural and horticultural irrigation
- Car wash systems
- Warehouses and distribution centres
- Residential rainwater harvesting systems
Technical Data
Rainwater inlet: 2 x DN 100/ DN 150 (110mm/160mm OD)
Tank inlet: 2 x DN 100/ DN 150 (110mm/160mm OD)
Outlet into sewer: 2 x DN 100/ DN 150 (110mm/160mm OD)Height difference between inlet invert and inverts of
a. outlet into the storage: 350 mm
b. outlet into the sewer: 510 mm
Mesh size: 0.65 mm
Weight: 16 kg
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