such as a basement fig2 6 depict in further detail the water drainage device typically a subterranean room includes a foundation wall that is built on a footer and a floor that abuts the foundation wall the wall illustrated is a block wall 26 but the system may be successfully implemented with other types of walls such as for example concrete or limestone walls frequently water builds up within the walls and can leak through the walls into the subterranean room building codes normally require that subterranean rooms be constructed to drain water from within a basement wall and redirect it out of the room this may be achieved in a number of ways including the use of drain and tile the foundation wall may have a vapor barrier in the form of a membrane material or coating applied to further inhibit the flow of water into the basement and on to the basement floor 30 a concrete block wall 26 is constructed with the use of concrete blocks which are hollow and are positioned vertically on top of each other aligning the hollow centers as water enters into the concrete wall the water flows through the hollow centers of the blocks and exits the wall from apertures 36 in blocks that are placed.