The ACO HexDrain Brickslot is a discreet and unobtrusive slot drainage system for domestic and light traffic installation, ideal for use in block paving or at thresholds.The HexDrain Brickslot is a combination of the highly successful HexDrain with an offset slot cover, specifically designed to allow drainage points to be under block or slab paving up to 60mm deep, and adjacent to walls and door thresholds.