This pack contains the SB30015 Silt SILTBLOK with a unique filter barrier.The SB30015 Silt SILTBLOK is a 300mm diameter chamber with a filter barrier, designed for installation upstream of large volume, cellular/crate attenuation systems, ponds, swales and irrigation systems.Diameter - 300mmDepth - 1530mmInlet / Outlet Options - Choice of 110mm - 160mm - please make contact after ordering to confirmInlet invert - 515mmThis SILTBLOK filters out sediment to help prevent blockages thus ensuring longevity and efficient drainage systems, as well as preventing flooding of any attenuation, swales or irrigation systems.Integrally the SILTBLOK unit has a unique filter barrier, which is made up of four microporous plastic sections, which are manufactured from 100% waste plastics.This unique and innovative filter design will drain water very quickly but the structure retains water which helps repel silt. This means that the screen will not clog, offering an exceptional yet simple sustainable solution. The filter has a permeable area of 50%, so provides exceptional flow, whilst blocking up to 95% of even the finest of silt.Chambers can be supplied with a fitted ladder if required.For pipework over 300mm it is POA (Price on Application), please get in touch for more information.