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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, 125 mm and 150 mm sizes, and with a TPO or PVC coated flange for direct membrane attachment.

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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. TPO and PVC coated options available.
Strainer Dome:   Yellow Vortex Breaker made of cast aluminum
Stem:   305 mm (12-in.) length
Clamp Ring:   Cast aluminum where applicable. *Not provided on TPO or PVC coated drains.

Performance Data

Performance Data

Flow Rates in Litres Per Second (l/s)

  Head Height of Water
Model 50 mm 75 mm 100 mm 125 mm
75 mm Clamp Ring Hercules-Plus 4.67 mm 6.94 mm 8.71 mm 13.88 mm
100 mm Clamp Ring Hercules-Plus 4.79 mm 11.86 mm 18.86 mm 25.87 mm
125 mm Clamp Ring Hercules-Plus 5.93 mm 9.4 mm 18.61 mm 27.32 mm
150 mm Clamp Ring Hercules-Plus 6.94 mm 15.33 mm 37.66 mm 47.44 mm *
*Test Rig could not go greater than 111.16 mm
Packaging Info

Packaging Info

Cat. No. Description Size (mm) Packaging Quantity Dimensional Weight (Kg)
HDAL3V Aluminum Herc. w/ Clamping Ring 75 Each 12.2
HDAL4V Aluminum Herc. w/ Clamping Ring 100 Each 12.2
HDAL5V Aluminum Herc. w/ Clamping Ring 125 Each 12.2
HDAL6V Aluminum Herc. w/ Clamping Ring 150 Each 12.2

Cat. No. Description Size (mm) Packaging Quantity Dimensional Weight (Kg)
HDTPO3V Herc. w/ TPO Coated Flange 75 Each 12.2
HDTPO4V Herc. w/ TPO Coated Flange 100 Each 12.2
HDTPO5V Herc. w/ TPO Coated Flange 125 Each 12.2
HDTPO6V Herc. w/ TPO Coated Flange 150 Each 12.2

Cat. No. Description Size (mm) Packaging Quantity Dimensional Weight (Kg)
HDPVC3V Herc. w/ PVC Coated Flange 75 Each 12.2
HDPVC4V Herc. w/ PVC Coated Flange 100 Each 12.2
HDPVC5V Herc. w/ PVC Coated Flange 125 Each 12.2
HDPVC6V Herc. w/ PVC Coated Flange 150 Each 12.2

Cat. No. Description Size (mm) Packaging Quantity Dimensional Weight (Kg)
HDCU3V Copper Herc. w/ Clamping Ring 75 Each 12.2
HDCU4V Copper Herc. w/ Clamping Ring 100 Each 12.2
HDCU5V Copper Herc. w/ Clamping Ring 125 Each 12.2
HDCU6V Copper Herc. w/ Clamping Ring 150 Each 12.2