Speier drain connectors connect waterproof membranes with rainwater drains placed close to low walls. They can be positioned horizontally or vertically and are compatible with bituminous membranes such as APP and SBS. Speier drain connectors are used to connect roof membranes with rainwater drains placed close to walls and can be positioned either horizontally or vertically. The special diameters with which they are produced make them compatible with corner connecting elements fitted with watertight gaskets.