Aquabocci R47 Patio Door Threshold Drainage System
The R47 Threshold drain has an open side entry point that allows water to be carried from the door track into the drainage channel. A unique feature of the R-47 is an EPDM silicon sleeve that is connected to the side entry point of the channel while sitting below the door track extrusion. The EPDM silicon sleeve acts as an extra water barrier and allows the system to fit any threshold thickness, whilst maintaining a flush finish at surface level between the floor tiles and the grate.
See full details at http://www.slimlinealuminium.co.uk