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. The flange is slightly inclined in relation to the tang to make it easier to install the drain connector on a slope, and the elastic material from which they are made ensures that they remain watertight over time. They have excellent resistance to deterioration caused by the sun, ozone and other atmospheric or chemical agents normally present. The elasticity of the raw material from which they are made allows for excellent flexibility even at low temperatures. The wide, completely smooth flange guarantees perfect bonding with PVC synthetic felts, and the long 500 mm tang allows them to pass through walls of considerable size. The drain connectors are fully compatible with prefabricated PVC synthetic felts. Thorough cleaning of the drain connector and the synthetic felt is recommended near the connection area to the drain connector.