About the Product
The SILTBLOK SB500B silt separator features a Ø500mm rotationally moulded chamber base, compatible with 150mm or 225mm twinwall main channel socket connections.
At its core, the SB500B integrates a central barrier plate combined with Turtle Enviro’s BLOK filtration system, engineered to efficiently capture and retain silt and Total Suspended Solids (TSS) before discharge.
The unit also incorporates an enhanced overflow weir section, designed to regulate flow velocity and reduce turbulence, ensuring stable hydraulic performance across varying conditions.
For ease of maintenance, the barrier and silt basket assembly are fully removable, allowing straightforward inspection, cleaning, and reinstallation. The integrated silt basket has a 17.5kg total capacity, designed to handle flow rates of up to 6 litres per second.
This silt separator is available in four standard shaft depths to suit a wide range of site requirements.
About Siltblok
The SILTBLOK range offers a series of advanced silt traps and separators designed to improve drainage efficiency and protect downstream infrastructure.
Each model within the range incorporates Turtle Enviro’s BLOK filtration system – a precision-engineered internal barrier that forces all flow through the BLOK before discharge, effectively removing suspended solids and silt particles as fine as 30μm (0.03mm).
All SILTBLOK units, including the SB500B, are tested and quality-assured prior to dispatch, ensuring long-term reliability, ease of maintenance and built to comply with criteria from SuDS and modern water management standards.

























