This pack contains the heavy duty SS500160HD Silt Trap with Catchpit and Filter.The SS500160HD Sentinel Silt Trap is a 450mm diameter chamber with catchpit and filter, designed to be put in line in front of a soakaway This silt trap has a depth of 2000mm and features one 160mm inlet and one 160mm outlet. This silt traps filter out sediment to help prevent the soakaway silting up thus ensuring longevity and an efficient soakaway system, as well as preventing flooding of the attenuation system.The Turtle Enviro soakaway silt traps are more technical and efficient than standard silt buckets as they work with a filter / mesh system to properly filter the water (however, as with regular silt traps, these also require regular cleaning out to avoid any blockages).We recommend using a silt trap with every soakaway installation to prevent build up within the attenuation systems. Highly recommended in areas where there is the potential of high levels of silt and sand, eg. coastal and heavily landscaped hard standing areas.This heavy duty model is designed to be installed in roads, car parks, hard standing and heavily trafficked areas that have vehicle loadings over 2.5 tonnes. This silt trap can also be used for deeper installations in a non-trafficked area.