Heavy Duty TPO Retro Drain

The one-piece spun aluminum body as a TPO coated flange for direct hot air welding of TPO roof membranes. The drain flange has a depressed sump area for improved flow and to faciliate drainage. The TPO RetroDrain is equipped with a heavy duty cast aluminum strainer dome for strength and durability, and incorporates U-Flow® Seal technology, providing a mechanical watertight connection to PVC or cast iron pipes. Available in 3-in., 4-in., 5-in., and 6-in. sizes.

Features & Benefits

  • One-piece seamless body manufactured from 0.125-in.,11 gauge spun aluminum.
  • Extra large 17 1/2-in., TPO coated flange.
  • Sump area.
  • Flange has welded metal clips for dome attachment.
  • 12-in. long drain stem designed to bypass the existing drain bowl right to the water leader.
  • Incorporates U-Flow Seal technology for a secure, watertight connection.
  • Simple and easy to install.
  • Also available with a plastic strainer dome.




For Detailed Drawings click here.  For 3-Part Specifications click here.

Ordering Info
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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.


Ordering Information

SKU Size Packaging Dimensional Weight Weight
HDTPO3A 3" Each 32 lb
HDTPO4A 4" Each 32 lb
HDTPO5A 5" Each 32 lb
HDTPO6A 6" Each 32 lb

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