ACO HexDrain Brickslot Channel with black plastic slotted grating 1m

I have two 3metre runs of ACO style drainage to install Looking online the recommended fall is anywhere between and 3cm

ACO HexDrain BrickSlot is a discrete slot drainage channel, the offset slot enables drainage location adjacent to walls and door thresholds for domestic app

aco brick slot ACO Drain Discussion in 'Landscaping and Given it is not that wide, was thinking of using the ACO slot drain

aco slot drain dwg Discreet slot ACO drainage channel for paving & block paving 1000x129x148mm Tapered 10mm drainage slot prevents blockages