Hi conor
The driveway is permeable concrete and will have a resin top which is permeable to allow water to drain. The aco drain was put in there as measure because the driveway has a slope towards the door. The flow out of the driveway isn't good onto the road because say road is straight but there is then slope down to my front door at a slight angle.
I will speak to them about the aco drains at the front, I take it they will need to be 150mm below dpc as well if they are put where the bricks are?
So no caps on the end of channel is fine? I threw water into them to test drainage and along the ends water flowed out onto the bricks, but in the middle it drained down the pipe towards soakaway