A waste/sediment collecting container has a front vertical wall, a back vertical wall, two side vertical walls, and a sloped bottom surface. Along the lowest portion of the sloped floor surface lays a debris grate which allows water and pieces of sediment to pass through (but prevents larger pieces of waste from passing). The collection container includes a sump directly beneath the debris grate for collecting heavy sediment which passes through the grate. Sloped walls along the sides of the sump lead to U-traps on both sides of the container that allow liquid to pass through but prevent any solid waste from leaving the sump. Solid waste may be removed from the sump by removing the threaded service cap from the drain hole. Located beyond the traps are filter chambers having drain holes for inserting sediment filters which liquid passes through and exits the container.