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O-Ring Drains

OMG O-Ring RetroDrains are designed for use in existing drain leaders smaller than 3-inches and larger than 6-inches. These drains feature four rubber O-rings to make a watertight seal. It’s available with a U-Flow cast aluminum strainer dome and aluminum clamping ring. The most common sizes are the 2-inch and 8-inch, but other sizes available on a custom made basis.

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Features & Benefits

Features & Benefits

  • 2-in. and 8-in. O-Ring RetroDrains have a one-piece, seamless body.  This eliminates the possibility of leaks due to poor welds at the stem and flange connection.
  • Available with a U-Flow cast aluminum strainer dome. They can also be retrofitted with the yellow Vortex Breaker Strainer dome.
  • Saves time and money by allowing easy installation from the rooftop without disturbing occupants.
Product Use

Product Use

O-Ring RetroDrains are designed to replace existing drains in re-roofing applications. Installed from the roof surface, the OlyFlow 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.

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

Technical Data

Technical Data

Drain Body (2-in.):   16 gauge (.064-in.) spun aluminum
Drain Body (8-in.):   11 gauge (.125-in.) spun aluminum
Seal:   2 rubber O-rings
Flange:   17 1/2-in. diameter
Strainer Dome:   Cast aluminum
Stem:   12-in. length
Clamp Ring:   Aluminum

Packaging Information

Packaging Information

Cat. No. Dome Type Size (in) Packaging Quantity Weight (lbs)
ALDR8A Aluminum 8 Each 32
ALDCR2A Aluminum 2 Each 32