Wednesday, April 17, 2024

US II RetroDrain - Product Information

An economical option featuring a one-piece spun aluminium body and a heavy duty cast aluminium strainer dome for strength and durability. The extra large flange provides a wide area for the attachment of the flashing membrane. The patented technology of the U-Flow Seal provides a mechanical watertight connection to PVC or cast iron pipes. Also available with a plastic strainer dome, in sizes 3", 4", 5", and 6".

Features & Benefits 



  • One-piece seamless body manufactured from 0.064",16 gauge spun aluminium.
  • Extra large flange - 17 1/2".
  • Drain flange has welded metal clips for dome attachment.
  • 12” long drain stem.
  • Incorporates the patented technology of the U-Flow Seal.
  • Simple and easy to install.


OlyFlow RetroDrains are designed to replace existing drains in reroofing applications. Installed from the roof surface, the 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.