Retrofit Drains (Reroof 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 Marathon Aluminum Fast Flow Roof Drain with Clamping Ring series (BFF200CR, BFF300CR, BFF400CR) is designed for retrofit and new roofing applications. Each model features a heavy-duty spun aluminum body, a 16-inch flange, and a 12-inch outlet. The clamping ring version includes a 10-inch polyethylene strainer, ABS clamping ring, and expanding tape anti-backup seal for watertight connections. Available in 2-inch, 3-inch, and 4-inch outlet sizes, these drains provide durability and...

The Marathon Aluminum Fast Flow Roof Drain series (BFF200, BFF300, BFF400) is designed for both retrofit and new direct-connect installations. Each model features a heavy-gauge spun aluminum body, a 16-inch flange, and a 12-inch outlet. Depending on the version, drains are supplied with a 10-inch polyethylene strainer with clamping ring or an 8-inch polyethylene strainer without a ring. Options include PVC- or TPO-coated flanges and a rubber coupling for secure pipe connection. Key Features:...

The Portals Plus 4″ Aluminum ReRoof Drain with Aluminum Dome is built specifically for retrofit applications over existing 4″ drains. It offers a spun aluminum flange for flush installation, a cast-aluminum dome strainer for durability, and multiple seal options (Premier Seal, Rubber Seal, Tape Seal) to ensure a watertight connection. Designed for rooftop installation without special tools, it delivers a dependable termination point for drainage systems. Key features: Spun aluminum flange and...

The Portals Plus 2″ Aluminum ReRoof Drain is built for retrofit use where an existing drain needs a watertight replacement. Both models feature a spun aluminum flange, cast aluminum gravel guard, and poly dome strainer. Model 66091 uses a pre-compressed expanding foam tape seal, while model 66691 uses a rubber seal. Each provides a permanent, flexible, watertight connection between the drain and existing pipe system. Key features: Spun aluminum flange and cast aluminum clamping ring for...

The Portals Plus 3″ Aluminum ReRoof Drain with Aluminum Dome is built for retrofit applications where existing roof drains require reliable replacement. Each model features a spun aluminum flange, cast aluminum dome strainer, and heavy-duty hardware designed for long-term watertight protection. The drain installs directly into existing 3″ drain bodies without special tools, offering a secure fit and dependable moisture control. Available models include the Premier Seal, Rubber Seal, and Tape...

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 Marathon BCTS39 Copper-Tite is a 3-inch retrofit roof drain built with a heavy copper body and an anti-backup expanding tape seal. This drain provides reliable watertight performance by locking into the existing pipe without disturbing the roof system. It comes standard with a 10-inch polyethylene strainer and ABS clamping ring, and is available with either a 14-inch small flange or an 18-inch large flange. With a 9-inch outlet length, the BCTS39 is a durable, retrofit-friendly solution...

The Marathon Copper-Tite BCTS29 is a 2-inch retrofit roof drain built with a copper body and an expanding anti-backup tape seal to prevent water backflow. It comes standard with a 10-inch ABS clamping ring and 10-inch polyethylene strainer, and is available with either a 14-inch small flange or 18-inch large flange to suit project requirements. The 9-inch outlet length supports secure integration into existing piping for dependable, watertight performance. Key Features: Copper body retrofit...

The Renova Drain is a retrofit roof drain solution made to install quickly by simply pushing into existing pipework with no tools required. Its multi-ribbed design includes rubber sealing rings that create multiple seals and act as an expansion joint to resist buckling. Constructed from UV- and weather-resistant polypropylene, the unit is compatible with all types of roofing systems. Key features: Quick push-in installation with no tools needed Multi-ribbed body with rubber rings forming up to...

The Marathon BCTS49 Copper-Tite is a 4-inch retrofit roof drain with a copper body and factory-applied expanding anti-backup tape seal. This drain fits tightly into existing pipes and comes with a standard ABS 10-inch clamping ring and a 10-inch polyethylene strainer. Available with either a 14-inch small flange or 18-inch large flange, the BCTS49 provides a durable, watertight retrofit solution with a 9-inch outlet length. Key Features: 4″ outlet size (BCTS49) with anti-backup expanding tape...

The Portals Plus 4″ Aluminum ReRoof Drain w/ Poly Dome is designed for retrofit roof drain replacement where an existing 4″ opening is present. It features a spun aluminum flange and a UV-stable poly dome strainer, and is offered in multiple sealing configurations—Premier Seal (68002), Rubber Seal (66621), and Tape Seal (66121) to meet different job requirements. The drain installs entirely on the roof surface, requires no special tools, and is built for a secure, watertight connection. Key...

The Portals Plus ABS ReRoof Drain with Aluminum Dome is a retrofit-friendly roof drain solution designed to install from the rooftop without removal of existing drain plumbing. Each assembly includes a 14” O.D. injection-molded black ABS flange with flashing lock, a cast aluminum dome strainer and gravel guard/clamping ring, and a pre-compressed expanding foam tape seal that forms a watertight connection to the existing drain pipe. It is engineered for efficiency, minimal tool requirement, and...

The Portals Plus 2″ Aluminum ReRoof Drain (SKUs 66101 / 66601) is designed for retrofit reroof applications, replacing existing drains without full removal. The unit features a spun aluminum O.D. flange (15″ or 18″), a cast aluminum gravel guard and clamping ring, and a cast aluminum dome strainer. It includes either a pre-compressed expanding foam tape seal (66101) or a rubber seal (66601) to form a watertight connection to the existing drain body. Key features: Cast aluminum dome strainer,...

This Portals Plus 3″ Aluminum ReRoof Drain is designed specifically for retrofit installations—replacing the drain directly on the roof without needing to remove the underlying system. It includes a spun aluminum flange (15″ or 18″ O.D.), a poly (UV-stable polyethylene) dome strainer, and your choice of sealing technology: Premier Seal (68000), Rubber Seal (66611) or Tape Seal (66111). The design ensures watertight performance for existing drain bodies in reroof projects. Key features: Poly...

The Marathon Aluminum Fast Flow Roof Drain with Clamping Ring & Expanding Tape Seal series (BFF200-SCR, BFF300-SCR, BFF400-SCR) combines the durability of spun aluminum with the security of an ABS clamping ring and expanding tape seal. Designed for retrofit and direct-connect installations, these drains feature a 16-inch flange, 12-inch outlet, and a 10-inch polyethylene strainer. The expanding tape anti-backup seal ensures watertight performance, making these drains ideal for single-ply...

The Portals Plus 5″ Aluminum ReRoof Drain w/ Aluminum Dome is engineered for retrofit applications replacing existing 5″ drain bodies. It features a spun aluminum flange, cast aluminum dome strainer and stainless steel hardware for long-term durability. Available in seal configurations such as the Premier Seal (68005) or Tape Seal (66171), this drain installs entirely on the roof surface and creates a robust termination point for the drainage system. Key features: Spun aluminum flange and cast...

The Portals Plus 5″ Aluminum ReRoof Drain w/ Poly Dome is built specifically for retrofit applications replacing existing 5″ drains. It features a spun-aluminum flange and a UV-stable molded polyethylene (poly) dome strainer, and is available in multiple sealing configurations—Premier Seal (68004) or Tape Seal (66131). The drain is designed for rooftop installation without special tools, offering a secure, watertight termination point for drainage systems. Key features: Spun-aluminum flange...

The Marathon BCTS89 Copper-Tite is an 8-inch retrofit roof drain made from heavy copper with a factory-applied expanding anti-backup tape seal. It includes a 10-inch ABS clamping ring and 10-inch polyethylene strainer. Designed for use in reroof or retrofit applications, it offers a watertight solution with minimal disturbance to existing roofing systems. This model features a 9-inch outlet length and large flange for secure installation. Key Features: 8-inch outlet size with retrofit copper...

The Portals Plus 68006 and 66141 6-inch aluminum reroof drains provide retrofit drainage solution with complete rooftop installation using stainless steel hardware. The models feature a spun aluminum flange, molded ultraviolet-stabilized polyethylene or cast aluminum dome strainer, and an outlet tube with pre-compressed modified asphalt impregnated expanding foam sealing tape rated from ­40 °F to +185 °F and 150% elongation. Model 68006 includes the Premier Seal mechanically expandable rubber...

The Marathon BCTS59 Copper-Tite is a 5-inch retrofit roof drain featuring a copper body and a factory-applied expanding anti-backup tape seal. It comes with a 10-inch polyethylene strainer and a 10-inch ABS clamping ring. Available in large flange size, and built with a 9-inch outlet length, the BCTS59 provides a reliable watertight solution for retrofits without disturbing the existing roof system. Key Features: 5-inch outlet size with retrofitted anti-backup tape seal Copper body for...

The Marathon 8″ ProMaxx Aluminator Roof Drain BALUM8CRPM is an all-aluminum retrofit drain designed for high-capacity installations. It features a ProMaxx rubber seal to prevent backflow, a heavy duty spun aluminum body, and a robust three-bolt 10″ strainer that stands 6″ tall. The drain includes a 16″ flange and 12″ outlet, with scalloped cast aluminum ring and leak-preventing features, built for durability and maximum drainage performance. Key Features: 8-inch outlet size (BALUM8CRPM) with...

The Portals Plus 66181 and 68007 are 6-inch aluminum re-roof drains engineered for retrofit installation with all rooftop access and stainless steel hardware. Model 66181 features the Tape Seal system while model 68007 uses the Premier Seal mechanical system. Both are equipped with an aluminum dome strainer and designed to fit over existing drain openings to simplify reroof drainage connections. Key features: Retrofit drain assembly for existing 6-inch pipe openings without full drain removal....

The RepairBoss Scupper Dome is the fastest solution to retrofit your roof without having to install a new drain or find the exact fit.  Includes:  Sturdy drain replacement scupperQuick Installation - No tool requiredUV stabilizedAdjustable crank fits most scupper outlets

The Marathon BCTS69 Copper-Tite Drain is a 6-inch retrofit roof drain designed with a copper body and factory-applied anti-backup expanding tape seal. It comes standard with a 10-inch ABS clamping ring and 10-inch polyethylene strainer. Built with an 18-inch large flange and a 9-inch outlet length, this drain delivers watertight performance for reroof and retrofit applications without disturbing the existing roof system. Key Features: 6-inch retrofit copper roof drain Factory-applied...