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O-Ring Drains

Designed for use in existing drain leaders smaller than 3-inches and larger than 6-inches

OMG O-Ring RetroDrains feature four rubber O-rings to make a watertight seal. It is 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

  • 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

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

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 Info

Cat. No.Dome TypeSize (in)Packaging QuantityWeight (lbs)
ALDR8AAluminum8Each32
ALDCR2AAluminum2Each32