Description The Manthorpe SmartDrain Junction Unit can be used to make a 90 corner, T-junction or cross when laying the SmartDrain system.   The product has thinned outside walls which can be easily removed with a craft knife.   Simply remove whichever and however many sides are required and connect to the rest of the system with the easy to fix clips.   Available with a black or silver grate.   Properties   Can be trimmed down easily. Makes a 90 corner. T-junction. Or 4-way junction. Available with black or silver grate cover.