Waterguard Basement Waterproofing Drainage Channel System Accessories - Waterguard (Flangeless) Corners.
Water flows more easily around a smooth curve than it does around a right angle.
These corners are curved 45 degree sections, they can be used as on their own as 45 degree corners or two together can be used to create a smooth sweeping 90 degree.
They are reversible so, whether used individually as 45 degree corners or in pairs to make 90 degrees, the same pieces can be used to create inside or outside corners. So, no matter what type of corners you need you can create them from this single item.
They are slightly larger in cross section than the Flangelss Waterguard channel which simply slots into the corner piece. When using them in pairs to make a 90 degree a short length of Flangless Waterguard channel (2 - 3") is used between them to join them together.
The two 45 degree pieces can also be installed either side of a Flangless Waterguard inspection port which makes the curve even more open and sweeping. Using this detail also means that one inspection port can be used to access two straight runs of channel either side of the corner. It also makes the inspection port lid proud of the foundation wall which is useful for situations where the basement is to be finished as it means that the inspection ports remain accessible - in front of the wall board.
They are sold in pairs, so the advertised price is for TWO 45 degree pieces, so buy one pair for each 90 degree corner that you need to go around.