Particularly effective for protecting older roof drainage and sewer systems from flooding, our 15-1/4" (390) Raintrol® roof drain has an easily calibrated, adjustable flow rate control. The Duco coated cast iron drain is also fitted with an extension sleeve that permits precise on-site adjustment to the varying thicknesses of roof insulation. Once adjusted, the drains combined gravel stop and flashing clamp grips roofing materials to create a watertight seal to waterproofing membranes without puncturing or disturbing existing or temporary roofing.
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