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Hercules® Roof Drain

Hercules RetroDrains, the industry’s most popular retrofit drain, are available in 80 mm, 100 mm, 125 mm and 150 mm sizes and with a variety of options to support any project, including OMG’s exclusive Vortex Breaker Strainer Dome, which can increase flow by up to 2.5 times (see Hercules-Plus), and with a TPO or PVC coated flange for direct membrane attachment.

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Features & Benefits

Features & Benefits

  • 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 standard for a secure, watertight connection.
Product Use

Product Use

Hercules RetroDrains are designed to replace existing new construction drains in re-roofing applications. Installed from the roof surface, Hercules RetroDrains are engineered to be installed without removing the existing drain fixture. Hercules RetroDrains 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.

Technical Data

Technical Data

Drain Body:  3.2 mm (0.125-in.) spun aluminum
Seal:  Watertight U-Flow mechanical seal (requires U-Flow screwdriver for installation)
Flange:  445 mm (17.5-in.) diameter with sump area. TPO and PVC coated options available.
Strainer Dome:  Cast aluminum or aluminum SuperDome
Stem:  305 mm (12-in.) length
Clamp Ring:  Cast aluminum where applicable. *Not provided on TPO or PVC coated drains. 

Packaging Info

Packaging Info

Aluminum Hercules

Cat. No. Description Size (mm) Packaging Quantity Dimensional Weight (Kg)
HDAL3A Aluminum Herc. w/ Clamping Ring 75 Each 12.2
HDAL4A Aluminum Herc. w/ Clamping Ring 100 Each 12.2
HDAL5A Aluminum Herc. w/ Clamping Ring 125 Each 12.2
HDAL6A Aluminum Herc. w/ Clamping Ring 150 Each 12.2

TPO Coated Hercules

Cat. No. Description Size (mm) Packaging Quantity Dimensional Weight (Kg)
HDTPO3A Herc. w/ TPO Coated Flange 75 Each 12.2
HDTPO4A Herc. w/ TPO Coated Flange 100 Each 12.2
HDTPO5A Herc. w/ TPO Coated Flange 125 Each 12.2
HDTPO6A Herc. w/ TPO Coated Flange 150 Each 12.2

PVC Coated Hercules

Cat. No. Description Size (mm) Packaging Quantity Dimensional Weight (Kg)
HDPVC3A Herc. w/ PVC Coated Flange 75 Each 12.2
HDPVC4A Herc. w/ PVC Coated Flange 100 Each 12.2
HDPVC5A Herc. w/ PVC Coated Flange 125 Each 12.2
HDPVC6A Herc. w/ PVC Coated Flange 150 Each 12.2

Copper Hercules

Cat. No. Description Size (mm) Packaging Quantity Dimensional Weight (Kg)
HDCU3A Copper Herc. w/ Clamping Ring 75 Each 12.2
HDCU4A Copper Herc. w/ Clamping Ring 100 Each 12.2
HDCU5A Copper Herc. w/ Clamping Ring 125 Each 12.2
HDCU6A Copper Herc. w/ Clamping Ring 150 Each 12.2