OMG Roofing Products Hercules Retrodrain

Code approved OMG Hercules RetroDrains, the industry’s most popular retrofit roof drain, are available in 3″, 4″, 5″ and 6″ sizes and with a variety of options to support any project, including TPO or PVC coated flange for direct membrane attachment.

Sold individually.

Product SKU
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OMG Roofing Products Hercules Retrodrain 3"
OMG Roofing Products Hercules Retrodrain 4"
OMG Roofing Products Hercules Retrodrain 5"
OMG Roofing Products Hercules Retrodrain 6"


Hercules Retro Drains are designed to replace existing new construction drains in re-roofing applications. Installed from the roof surface, Hercules Retro Drains are engineered to be installed without removing the existing drain fixture. Hercules Retro Drains have a mechanical seal for direct connection to existing PVC or cast iron plumbing.

As with all building materials, it is the responsibility of the installer to review product use with a design professional to confirm safety, compatibility and acceptance with the roof cover manufacturer and local building codes.

• Saves time and money by allowing easy installation from the rooftop without disturbing occupants.
• Cast aluminum strainer dome and clamping ring that will not rust for long term durability and performance.
• U-Flow Seals exceed the ANSI/SPRI RD1 (introduced in 2004) standard for a secure, watertight connection.
• Most OMG Hercules Drains have been certified by QAI Laboratories to conform with ASME 112.6.4 and CSA-B79-08.

Drain Body: 11 gauge (.125-in.) spun aluminum
Seal: Watertight U-Flow mechanical seal (requires U-Flow screwdriver for installation)
Flange: 17.5-inch diameter with sump area. TPO and PVC coated options available.
Strainer Dome: Cast aluminum, aluminum SuperDome or Vortex Breaker dome
Stem: 12-inches
Clamp Ring: Cast aluminum where applicable. *Not provided on TPO or PVC coated drains.

Aluminum Hercules drains are most common stock item. Contact us for price and availabililty on TPO or PVC coated Hercules Drains.