Heavy Duty PVC Coated AlumaWeld RetroDrain

The one-piece spun aluminum body has a plastisol coated flange for direct hot air welding of PVC type roof membranes. The drain flange has a depressed sump area to facilitate the easy drainage of all water from the roof surface.  The drain is equipped with a heavy duty cast aluminum strainer dome for strength and durability. The Heavy Duty AlumaWeld RetroDrain incorporates the technology of the U-Flow® Seal technology providing a mechanical watertight connection to PVC or cast iron pipes. Also available with a plastic strainer dome, 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., plastisol coated flange.
  • Sump area
  • Flange has welded metal clips for dome attachment.
  • 12-in. long drain stem.
  • Incorporates U-Flow Seal technology for a secure, watertight connection.
  • Simple and easy to install.




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
HDPVC3A 3" Each 32 lb
HDPVC4A 4" Each 32 lb
HDPVC5A 5" Each 32 lb
HDPVC6A 6" Each 32 lb

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