CRS stocks OMG Retrofit Drains for use in commercial flat-roof installations. Whether you are replacing some old roof drains or working on a new installation, these easy-to-install drains provide excellent drainage and help improve the overall look of your roof.  If you do not see what you need, please call us at (800) 267-2308.

  • OMG Hercules RetroDrain

    OMG Hercules RetroDrain

    $250.00 – $275.00     Select options This product has multiple variants. The options may be chosen on the product page
  • OMG 2 inch O-Ring RetroDrain

    OMG 2 Inch O-Ring RetroDrain

    $240.00     Add to cart
  • OMG 8 Inch O-Ring RetroDrain

    OMG 8 Inch O-Ring RetroDrain

    $530.00     Add to cart
  • OMG 10 Inch O-Ring RetroDrain

    OMG 10 Inch O-Ring RetroDrain

    $700.00     Add to cart
  • OMG 3 inch Scupper Thru-wall RetroDrain

    OMG 3 inch Scupper Thru-wall RetroDrain

    $343.00     Add to cart
  • OMG 4 inch Scupper Thru-wall RetroDrain

    OMG 4 inch Scupper Thru-wall RetroDrain

    $356.00     Add to cart
  • OMG 5 inch Scupper Thru-wall RetroDrain

    OMG 5 inch Scupper Thru-wall RetroDrain

    $360.00     Add to cart
  • OMG 6 inch Scupper Thru-wall RetroDrain

    OMG 6 inch Scupper Thru-wall RetroDrain

    $396.00     Add to cart