• 3-in. and 4-in. are manufactured from 0.032-in. spun-punched copper; 5-in. and 6-in. are manufactured from .050-in. spun-punched copper.
• Extra large flange - 171/2-in., with depressed sump area.
• Cast aluminum strainer dome and clamping ring will not rust.
• 12-in. long drain stem.
• Incorporates U-Flow Seal technology for a secure, watertight connection.
• Also available with plastic or cast aluminum SuperDome^® and OverFlow, FlowControl or QuickFlow attachments.
• Simple and easy to install from rooftop.

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.