Silt Traps For uPVC and Twinwall Drainage

Our robust, chemically resistant Polypropylene and Polyethylene silt traps are available in a in a range of depths and pipe sizes for your soakaway and attenuation requirements. We stock silt traps for 110mm & 160mm uPVC drainage systems, as well as 150mm, 225mm, 300mm twinwall drainage systems.


Placed upstream of your soakaway crates or attenuation tank, silt traps act as filter for your drainage system. Without a silt trap your soakaway will begin to fill up with debris, therefore drastically reducing its effectiveness and its lifespan, until it will need to be dug out and replaced.

The silt trap contains a bucket which catches any silt, soil and sediment, or even sanitary items and paper towels if placed downstream of a septic tank, which can then be removed simply by lifting out the bucket.

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  • What is the difference between a silt trap and a catch pit?
    A silt trap is designed to capture sediment and other pollutants from stormwater runoff, while a catch pit is designed to capture larger debris such as leaves and branches. Silt traps typically have a smaller capacity and require more frequent maintenance, while catch pits can hold more debris but may not be as effective at capturing pollutants.
  • Where would a silt trap be installed?
    Silt traps are typically installed in areas where there is a high risk of sediment runoff, such as construction sites, industrial facilities, and parking lots. They are designed to capture sediment and other pollutants before they can enter nearby waterways.
  • How effective are silt traps?
    Silt traps can be very effective in reducing water pollution by capturing sediment and other pollutants before they enter waterways. However, their effectiveness can vary depending on factors such as the size and design of the trap, the amount of sediment and pollutants in the water, and how frequently the trap is maintained and cleaned. Regular maintenance and cleaning are crucial to ensure that silt traps continue to function effectively.
  • Does a soakaway need a silt trap?
    Yes, a soakaway typically requires a silt trap to prevent sediment and debris from clogging the drainage system. The silt trap helps to filter out any solids before the water enters the soakaway, ensuring that it functions properly and efficiently.
  • Where is a trap used in plumbing?
    A plumbing trap is a U-shaped pipe that is used to prevent sewer gases from entering a building. It is typically installed under sinks, showers, and other plumbing fixtures. The trap holds a small amount of water that creates a seal, preventing gases from passing through.