IB Retrofit Drain

The IB Retrofit Drain is designed to be used on overlaid roof systems to make a watertight connection between the newly installed drain and the existing drain leader. IB roof systems provide multiple options to accommodate the various drain diameters that may be encountered, such as the pro seal rubber gasket, which is inserted into the existing drain leader and tightened to compress and seal the gasket inside the pipe, or an expandable foam gasket for smaller diameter pipes that expands within the pipe once unwrapped and inserted. Make sure to refer to the IB Retrofit Drain data sheet for more details on sizing selection and instructions. Fasten the drain flange with a minimum of four IB-approved fasteners spaced evenly around the drain flange. When installing over an existing drain, fasten the new flange to the existing bowl flange. Heat weld the target flashing to the field membrane to form a one-and-a-half-inch welded seam around the entire target flashing. Upon completing the installation, ensure all seams and laps are inspected and probed. If deficiencies are found, the area must be rewelded or repaired.