Abstract: A roof drain receiver for a site cast construction is provided comprising: a hollow main body partially buried in a wall of the construction near its bottom portion during the site casting and having one or more top inlets for receiving a number of vertical drain pipes extending interior of the construction wall to channel drain water collected from the top of the construction, and a large rectangular spout extending from the main body to an exterior side of the construction wall for emitting the channeled water off the wall. The main body has an anchoring flange for securing the same to an inner surface of the construction, a replaceable faceplate having a large rectangular opening in the center and a check door pivotally connected to the faceplate for allowing water down flowing while it normally blocks a forced entry of foreign objects into the main body.