• Pre-punched, .080-in. thick, extra large 18-in. x 18-in. aluminum drain flange with plastisol coating. The coated flange, provides ample area for hot air welding of PVC based membranes, giving a homogeneous water tight connection.
• 14-in. diameter .080-in. thick aluminum drain strainer dome.
• A 9-in. long drain stem.
• Incorporates the patented RAC Backflow Compression Seal.
• Simple and easy rooftop install.

OlyFlow RetroDrains are designed to replace existing drains in reroofing applications. Installed from the roof surface, OlyFlow RetroDrains are engineered to be installed without removing the existing plumbing or fixture while providing a watertight connection to the roof system and the existing plumbing.

As with all building materials it is the responsibility of the installer to review its usage with a design professional to confirm safety, compatibility and acceptance with the roof cover manufacturer as well as local building codes.