STORM WATER DRAIN PIT

The invention relates to a storm water drain pit comprising: an inlet for storm water; a filter for removing particles from the storm water, comprising a cylindrical body comprising coherent man-made vitreous fibres (MMVF) bonded with a cured binder composition; wherein the cylindrical body has a hollow centre and an outer wall; a guide element for guiding water from the inlet into the cylindrical body; a sedimentation chamber for sedimentation of particles from the storm water, wherein the cylindrical body is positioned below the inlet and above the sedimentation chamber; an outlet for filtered water; wherein the outlet is positioned above the sedimentation chamber and below the inlet; and a separation element for separating the sedimentation chamber from the outlet; wherein the cylindrical body has a density in the range of 50 to 200 kg/m3, a binder content in the range of 2 to 5 wt % and the outer wall has a circumferential thickness in the range of 2 cm to 20 cm.