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Hercules®-Plus Roof Drain

With integrated vortex breaker technology, the Hercules-Plus RetroDrain can provide up to 2.5 times greater water flow to reduce excessive water and weight from the roof faster. Hercules-Plus drains are available in 75 mm, 100 mm and 150 mm sizes.

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Features & Benefits

Features & Benefits

  • Water flow is up to 2.5 times faster versus the original Hercules Drains.
  • Bright yellow strainer domes are cast aluminum for strength and durability, and remain visible on the roof for improved safety.
  • U-Flow Seal exceeds the ANSI/SPRI RD1 standard for a secure, watertight connection.
  • Saves time and money by allowing easy installation from the rooftop without disturbing occupants.
Product Use

Product Use

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

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. 
Strainer Dome: Yellow Vortex Breaker made of cast aluminum
Stem: 305 mm (12-in.) length
Clamp Ring: Flat aluminum


BS EN1253-3-2015


Packaging Info

Packaging Info

Aluminum Hercules-Plus

Cat. No. Description Size (mm) Packaging Quantity Dimensional Weight (Kg)
HDAL3V-FCR Aluminum Herc. Plus w/ Flat Clamping Ring 75 Each 12.2
HDAL4V-FCR Aluminum Herc. Plus w/ Flat Clamping Ring 100 Each 12.2
HDAL6V-FCR Aluminum Herc. Plus w/ Flat Clamping Ring 150 Each 12.2
Performance Data

Performance Data

Flow rate of Hercules Drains (GPM) with OMG Vortex Breaker

Head of Water (in.) 3-in. Hercules Plus 4-in. Hercules Plus 6-in. Hercules Plus
1 30 43 28
2 74 76 110
3 1110 188 243
4 138 299 597