The grit trap basket is positioned in a specially designed sump by means of lifting tackle. A rubber lip is attached to the outer edge of the trapping basket to seal the clearance between the basket and the sump wall. At the same time, this lip allows easy locating of the trapping basket within the sump. An inlet plate reduces the residence time in the sump area and therefore minimises the sedimentation of light materials. The bottom of the basket is provided with holes that are pressurized by air to ensure good aeration and recirculation of the debris.
Installation and commissioning in the sewer can be achieved quickly by interrupting the flow briefly whilst the sump is emptied. Thereafter the grit trap basket is lowered in the sump, connected and is ready for service.
To empty the trap basket, uncouple the pressure hose and lift the basket out of the sump completely, using a lifting mechanism. Grit and debris will remain in the basket. The residual water will drain out through the bottom of the trap basket. Empty the basket into a dumpster of sip or alternatively directly into the waste vehicle. To open the grids, fold them by pulling the unlocking rod in the centre. The debris will slide out from the retaining surfaces in the base. After emptying the basket, swivel the grids back and return the basket back into the sump. After reattaching the pair pressure coupling the grit trap is ready for use.