Complete 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 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...

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...