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 Zurn Z100 roof drain features a 15-inch diameter Dura-coated cast iron body for dependable rooftop drainage. It includes a combination membrane flashing clamp and gravel guard with a low silhouette cast iron dome, and is offered in multiple pipe sizes and outlet connections. Key Features 15-inch diameter Dura-coated cast iron body Combination membrane flashing clamp and gravel guard Low silhouette 4-1/2 inch cast iron dome Available in 2, 3, 4, 5, 6, and 8 inch pipe sizes Outlet options...

The Zurn ZC121 roof drain is built with a Dura-coated cast iron body designed for rooftop drainage. It includes a combination membrane flashing clamp and gravel guard, and accommodates multiple outlet types and dome variants for flexible installation. Key Features 12-inch diameter Dura-coated cast iron body Combination membrane flashing clamp and gravel guard Low silhouette dome options (cast iron or poly) Available in multiple outlet types Supports accessory options like underdeck clamps and...

The Marathon PVC Roof Drain Kit, also known as the Enpoco Pak, is designed for reroof and retrofit applications requiring fast and reliable drainage. Made from durable PVC, these drains come in multiple outlet sizes (2″, 3″, 4″, and 6″) and feature a complete kit including a strainer and clamp ring. Easy to install and lightweight, the Enpoco Pak provides a cost-effective solution for contractors needing dependable roof drainage. Key Features: Available in 2″, 3″, 4″, and 6″ outlet sizes...

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 C1-3080 is a 10-inch cast iron strainer designed to provide superior protection for roof drains. Its heavy-duty dome construction prevents debris from blocking drainage while allowing efficient water flow. With accurate dimensions of 9-5/8″ outside diameter and 4-1/2″ height, this cast iron strainer is built for strength, long service life, and resistance to corrosion in demanding environments. Key Features: 10″ cast iron dome strainer Dimensions: 9-5/8″ OD × 4-1/2″ H Heavy-duty...

The Zurn Z100 roof drain features a 15-inch diameter Dura-coated cast iron body paired with a poly dome for rooftop drainage. It includes a combination membrane flashing clamp and gravel guard, with availability in multiple pipe sizes and outlet connections. Key Features 15-inch diameter Dura-coated cast iron body Combination membrane flashing clamp and gravel guard Poly dome for rooftop drainage Available in 2, 3, 4, 5, 6, and 8 inch pipe sizes Outlet options include No-Hub, Inside Caulk, 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 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 Marathon C1-3132 is a 12-inch cast iron roof drain strainer engineered for maximum durability and longevity. Its dome design helps prevent debris from clogging drains while maintaining water flow. Constructed from heavy-duty cast iron, it measures 12-1/4″ outside diameter and 7″ in height, making it an excellent choice for large roof drain systems where strength and corrosion resistance are required. Key Features: 12″ cast iron dome strainer Heavy-duty construction for long service life...

The Marathon RD-27 is an epoxy-coated cast iron scupper roof drain for parapet applications, supplied with a flashing clamp and secured angled grate. It is standard with a no-hub outlet; options include a threaded outlet, flat grate, nickel bronze grate/frame, vandal-proof grate, galvanized finish, and a 45-degree outlet (no-hub only). Available in 2″, 3″, 4″, and 6″ sizes mapped to SKUs BS-1175, BS-1180, BS-1185, and BS-1190.Key Features: Epoxy-coated cast iron construction for long life and...

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 Marathon Cast Iron Roof Drain Kit, also known as the Cast Pak, is built from heavy-duty cast iron to provide long-lasting durability and watertight performance. Each kit includes a cast iron drain body, clamp ring, and strainer. Available in 3″, 4″, 6″, and 8″ outlet sizes, the Cast Pak is designed for reroof and retrofit applications where strength and reliability are essential. Key Features: Available in 3″, 4″, 6″, and 8″ outlet sizes Rugged cast iron construction for maximum durability...

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 ABS Drain with Aluminum Dome is a roof-drain kit engineered for both new installations and retrofit (re-roof) applications on single-ply and built-up roofing systems. It includes an injection-molded UV-stable ABS drain body, a cast aluminum dome strainer, an epoxy-coated cast aluminum clamping ring and gravel guard, a cast aluminum under-deck clamp, and a flexible EPDM connector with stainless steel clamps. Available in sizes to fit 3″, 4″ and 6″ internal drain openings. Key...

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 White PVC Plus Pack w/ Poly Dome is a ready-to-install roof drain kit designed for both new and retrofit applications on single-ply and BUR roof systems. It includes an injection-molded UV-stabilized PVC drain body, a molded UV-stabilized polyethylene (poly) dome strainer, epoxy-coated cast aluminum gravel guard/clamping ring, a cast aluminum under-deck clamp, and a flexible EPDM connector with stainless clamps. The kit is engineered for reliability, easy installation, and...

The Portals Plus Aluminum Scupper Drain is designed for side-wall or parapet wall roof installations where drainage must travel through a wall or side of the roof. It features a cast aluminum sump body measuring 6″ tall by 11″ wide, a removable bolted flashing clamp allowing secure termination of the roofing membrane and flashing plies, and a no-hub outlet extension capable of horizontal, vertical or 45° positioning. Available in 2″ (67301), 3″ (67311), and 4″ (67321) sizes. Key features: Cast...

The Portals Plus PVC Plus Pack w/ Aluminum Dome is a comprehensive roof-drain kit designed for both new and retrofit installations on single-ply and built-up roofing systems. Each kit includes an injection-moulded UV-stabilized PVC drain body, a 6″ Schedule 40 body extension, a cast aluminum under-deck clamp, a flexible EPDM connector with stainless steel clamps, and a cast aluminum dome strainer with epoxy-coated gravel guard/clamping ring. The kit is engineered for durability, minimal field...

The Marathon BS-1300CI Cast Iron Retrofit Ring & Dome provides a rugged solution for retrofitting existing roof drains. Built from heavy-duty cast iron, it delivers superior strength and long-term performance. This retrofit assembly is designed to fit 3-bolt or 4-bolt drain patterns ranging from 6-1/2″ to 11-3/4″, making it versatile for multiple roof drain installations. Key Features: Cast iron retrofit dome with ring assembly Compatible with 3- or 4-bolt drain patterns Fits bolt patterns...

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 RepairBoss drain dome is the fastest solution to retrofit your roof without having to install a new drain or find the exact fit. Fits most drains and openings with ease, allowing quick installation and long term performance. It's sturdy and UV stabilized. It has an adjustable crank that will fit 2-8 inch drains. No tools required. Available individually or in boxes of 10. (9” round x 3.25” height) Key Features: Sturdy drain replacement dome Quick installation Adjustable crank fits 2" -8"...

The units assembled together provide a roof drainage system with an extension range of 3/4" to 8" to accommodate for specified insulation heights provided by the roofer. Slots provided around the base of the sump pan permit the installer to secure this system to the top of the deck. The R1200-JD-STR is professionally designed for new and replacement installations.

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 ABS Roof Drain Plus Pack with Aluminum Dome is a comprehensive roof-drain kit engineered for both new construction and retrofit applications in single-ply and built-up roof systems. It includes an injection-molded UV-stable ABS drain body, a cast aluminum dome strainer, cast aluminum gravel guard and clamping ring, a cast aluminum under-deck clamp, and a flexible EPDM connector with stainless steel clamps. Available in sizes suited for 3″, 4″ and 6″ internal drain openings....

The Portals Plus Cast Iron Plus Pack Roof Drain with Poly Dome is designed for both new and retrofit roof drainage applications. It features a heavy cast iron drain body, a molded UV-stabilized polyethylene (poly) dome strainer, cast-aluminum epoxy-coated gravel guard and clamping ring, a cast-aluminum under-deck clamp, and a flexible EPDM expansion coupling with stainless steel clamps. This kit is engineered to provide reliable performance in single-ply and built-up roof systems. Key...

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 WP3000-DD-42 dome is a cast-iron replacement dome designed for Wade 3000-series roof drains. It protects the drain inlet from roof debris, gravel, and ice while allowing efficient water flow. The dome is built for heavy-duty commercial and industrial rooftops and serves as the correct OEM replacement for 3000-series drains.

The Portals Plus Cast Iron Plus Pack Roof Drain with Aluminum Dome is a comprehensive kit built for both new installations and retrofit (re-roof) projects. Each unit features a cast iron drain body for structural durability, a cast-aluminum dome strainer for high resistance to wear and weather, a cast-aluminum under-deck clamp, and a flexible EPDM expansion coupling with stainless steel hardware. The kit is designed for single-ply or built-up roof drainage systems. Key features: Cast iron...

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 ABS Roof Drain Plus Pack with Plastic Dome is a versatile drain kit designed for both new and retrofit installations in single-ply or built-up roof systems. It includes an injection-molded UV-stable ABS drain body, a molded UV-stable polyethylene (plastic) dome strainer, a cast aluminum clamping ring with gravel guard, a cast aluminum under-deck clamp, and a flexible EPDM coupling with stainless steel clamps. Available to fit 3″, 4″ and 6″ internal drain openings. Key...

The WP3000-42-DOME is a heavy-duty cast-iron dome designed for Wade 3000 Series roof drains. This tall-cage style dome provides dependable debris protection while allowing strong water flow across commercial and industrial flat roof systems. Its reinforced vertical bar design delivers long-term performance in demanding rooftop environments, making it an ideal replacement for damaged or worn domes on existing Wade 3000 installations.

The WP3012-42-DOME is the replacement cast-iron dome designed for the Wade 3012 roof drain. It provides a durable protective cover that helps prevent debris, gravel, and roofing material from entering the drain body while maintaining efficient rooftop water flow. Built from heavy-duty cast iron, this dome is engineered for long service life in commercial and industrial roofing environments. It is the correct OEM replacement for the Wade 3012 drain series.

Oatey� ABS Roof Drains offer superior rainwater drainage while resisting debris and material buildup. Available in a variety of sizes, these roof drains feature a black cast iron or UV-stable ABS dome with a free-flow area that provides more than 200 square inches of protection. Five anchor positions on the drain base ensure secure installation, and the gravel guard collar easily clamps to the drain base with a twist-and-lock feature. Oatey products have earned the trust of plumbing...

The WP3000-D2 is the external water dam and overflow attachment designed for Wade 3000 Series roof drains. This component provides an elevated overflow barrier that helps control water levels during heavy rainfall or drainage backup. It attaches directly to the drain body and increases the drain’s ability to manage rooftop water by creating an additional overflow path. Built for commercial and industrial flat roof systems, this part enhances drainage performance and helps protect roof surfaces...

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....