3 in. Hercules RetroDrain, Cast Alum. Dome - 3 in. Hercules RetroDrain, 3 in. output, with Cast Aluminum Dome, 17-1/2 in. diameter base flange, 12 in. long drain stem. All Aluminum Construction. Price/Drain.
3 in. Hercules RetroDrain, Cast Alum. Dome
$423.00 SALE $283.15
(Savings: $139.85)
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3 inch Hercules RetroDrain, 3 inch output, with Cast Aluminum Dome, 17-1/2 inch diameter base flange, 12 inch long drain stem. All Aluminum Construction. Price/Drain.

Retrofit drain. Drain stem fits into a 3 inch ID pipe and seals using a screw tighted plug / rubber seal.

Ordering Notes:

  • Shipping leadtime: 1-2 business days.


RetroDrains are designed to replace existing drains in reroofing applications. Installed from the roof surface, the RetroDrains are engineered to be installed without removing the existing plumbing or fixture while providing a watertight connection to the roof system and the existing plumbing.


  • 17-1/2 inch x 17-1/2 inch aluminum seating flange
  • 12 inch long drain stem assembly
  • 9.8 inch Diameter x 7.25 inch high dome
  • Aluminum drain / clamping ring
  • Stainless steel hardware
  • Incorporates U-flow compression seal
  • One-piece spun aluminum body
  • Heavy duty cast aluminum strainer dome
  • Drain flange has a depressed sump area to facilitate water drainage from the roof surface
  • Seal provides a mechanical watertight connection to PVC or cast iron pipes
  • Simple and easy to install from deck / rooftop
  • OPTIONS: Also available with plastic, cast aluminum dome (8 inch high x 9.8 inch diameter), and cast aluminum SuperDome in sizes 3 inch, 4 inch, 5 inch, and 6 inch and with OverFlow FlowControl or QuickFlow attachments (see datasheet)



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similar product terms: balcony drain, retrofit drain, retro balcony drain, retro deck drain, deck drain, retrofit deck drain, retrofit roof drain, walk deck drain, retro walk deck drain, retrofit walk deck drain

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