OMG Roof Drains

The OMG Hercules Aluminum RetroDrains (SKUs HDAL3A, HDAL4A, HDAL5A, HDAL6A) are durable retrofit roof drains designed to replace existing drains in re-roofing projects without removing the existing drain fixture. Each drain features a one-piece spun aluminum body, heavy cast aluminum strainer dome, large flange for secure membrane attachment, and a U-Flow mechanical watertight seal that connects reliably to existing plumbing (PVC or cast iron). These drains meet multiple codes and standards...

The U-Flow Screwdriver is a special-purpose tool by OMG designed to install U-Flow Seals for Hercules Retrofit Roof Drains. It features an extra-long shaft to reach recessed screws on the compression seals and includes a loss prevention bar so the tool is more secure during use. Its #2 Robertson square tip matches the low-profile, recessed head screws used in the U-Flow Seals. Key Features long 12.5-inch shaft for reaching deep screws in drain stems #2 Robertson square tip that fits the...

The SCUPRD3, SCUPRD4, SCUPRD5, and SCUPRD6 models are part of OMG’s Scupper Thru-Wall RetroDrain product line. Designed to replace existing through-wall or side-wall drains in re-roofing applications, these drains provide a secure and watertight solution without requiring removal of existing plumbing. They feature a durable aluminum body, stainless steel hardware, a large pre-punched flange for flashing integration, and the proven U-Flow mechanical seal to connect securely to PVC or cast iron...

The HDTPO3A, HDTPO4A, HDTPO5A, and HDTPO6A models are Hercules series TPO-Flange RetroDrains by OMG, designed for retrofit roof drain projects under TPO membrane systems. They feature a one-piece spun aluminum body, a TPO-coated flange engineered for direct membrane welding, a watertight U-Flow mechanical seal to connect to existing PVC or cast iron piping, and cast aluminum strainer dome and clamping components for durability in harsh environments. These drains allow rooftop drains to be...

VTBSTR10-YW is the yellow vortex breaker strainer dome by OMG, designed to retrofit onto existing Hercules or Aluminum Classic roof drains in 3-, 4-, 5-, or 6-inch sizes. The strainer integrates vortex breaker technology in its cast aluminum dome to accelerate drainage (up to 2.5× more flow versus standard strainers), reduce “chugging” of water, and enhance performance under heavy rainfall. Its bright safety yellow finish helps visibility on the roof and marks drain locations clearly. Key...

The OMG Hercules-Plus Aluminum RetroDrain with Vortex Breaker is a high-performance retrofit drain available in 3-inch, 4-inch, 5-inch, and 6-inch models (HDAL3V–HDAL6V). It combines a one-piece spun aluminum body with a large flange and the innovative vortex breaker dome for up to 2.5× greater flow than standard designs. The drain installs from the rooftop without disturbing existing plumbing and includes OMG’s watertight U-Flow mechanical seal for connection to existing pipes. Its safety...

The HDPVC3V, HDPVC4V, HDPVC5V, and HDPVC6V models are the PVC-coated, vortex breaker versions of OMG’s Hercules-Plus RetroDrains, covering 3-inch through 6-inch sizes. Each unit includes a PVC-coated flange designed for direct heat welding to PVC roof membranes, a vortex breaker dome that enhances drainage flow (up to 2.5×), and a U-Flow mechanical seal for watertight connection to existing piping. These drains retrofit over existing drains from the roof surface without disturbing the plumbing...

The legion of HDTPO3V, HDTPO4V, HDTPO5V, HDTPO6V comprises the TPO-flanged versions of OMG’s Hercules-Plus Vortex Breaker RetroDrains, spanning 3-inch through 6-inch sizes. These drains combine durable spun aluminum bodies with a TPO-coated flange for direct membrane welding, and include the integrated vortex breaker dome to boost flow (up to 2.5×). Each unit also includes the U-Flow mechanical seal for a watertight connection to existing piping, enabling rooftop retrofit without disturbing...

The OMG O-Ring RetroDrain 8-Inch (SKU ALDCR8) is engineered to retrofit existing large roof drains without disturbing building occupants or removing plumbing fixtures. Its one-piece spun aluminum body and dual rubber O-rings create a secure watertight seal, while the extra-large flange ensures a reliable connection with roofing membranes. Designed for durability and ease of installation, it is available with a cast aluminum strainer dome and aluminum clamp ring. Key Features: Seamless 11-gauge...