One-piece spun aluminum body and heavy duty cast aluminum strainer dome and clamping ring provide strength and durability. The drain flange has a depressed sump area to facilitate water drainage from the roof surface. The TRI-BUILT® Aluminum Hercules Retro Drain incorporates TRI-BUILT® U-Flow® Seal technology for a mechanical watertight connection to PVC or cast iron pipes to prevent water from backup damage

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Main Points 1

• One piece seamless body provides strength and durability without separation of the flange from the stem.

• Extra-large flange allows positive attachment of roof flashing membrane while the sump area facilitates drainage.

• Simple and easy to install from rooftop in 15 to 30 minutes.

• Cast aluminum strainer dome and clamping ring.

• 12-in. long drain stem accommodates most existing field conditions with longer lengths available.

• Sizes: 3”, 4”, 5” & 6”

• Also available in or with TPO & PVC coated flanges


Aluminum Hercules RetroDrain