Marathon Roof Drains

The Marathon BS-1043 Adjustable Drain Guard is a 5-inch dome-style guard designed to prevent debris from entering and clogging roof drains. Built from corrosion-resistant aluminum, it is both durable and lightweight. With a 5″ (127 mm) outside diameter and an overall length of 13″ (330 mm), this adjustable guard ensures secure installation and reliable long-term protection for roof drainage systems. Key Features: 5″ adjustable aluminum drain guard Dimensions: 5″ OD × 13″ length (127 mm × 330...

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 Aluminator Retrofit Roof Drain series (BALUM3CRP, BALUM4CRP, BALUM5CRP, BALUM6CRP) delivers an all-aluminum solution for secure and efficient retrofit drainage. Constructed from heavy gauge spun aluminum, each drain includes a ProSeal rubber mechanical seal, a cast aluminum clamping ring, and a 10-inch aluminum strainer. With a 16-inch flange and 12-inch outlet, the Aluminator series ensures durability and consistent performance across all sizes. Key Features: All-aluminum...

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 305-C1-30752 (vendor part C1-30752) is a 10-inch plastic roof drain strainer designed for dependable debris protection. This model uses a bolt-in-place, three-bolt attachment for secure installation and is supplied in black plastic. Sized at 9-1/2″ outside diameter by 4-1/2″ height, it offers an economical solution that fits many applications. Key Features: Economical and fits many applications 10″ plastic strainer with bolt-in-place, three-bolt attachment Black in color Compact...

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 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 Marathon BS-104 Adjustable Drain Guard is a 10-inch dome-style guard engineered to keep debris from clogging roof drains. Constructed of corrosion-resistant aluminum, it provides both durability and lightweight performance. With a 10″ (254 mm) outside diameter and 13″ (330 mm) overall length, this adjustable guard offers a secure fit and long-lasting protection for commercial and industrial roof drainage systems. Key Features: 10″ adjustable aluminum drain guard Dimensions: 10″ OD × 13″...

The Marathon C1-3131 is a 12-inch plastic twist-lock roof drain strainer engineered to protect roof drains from debris while offering easy installation. Finished in black plastic, it fits many applications where a large-diameter dome is needed. It measures approximately 12-1/4″ outside diameter and 8-3/4″ in height, making it an economical solution for commercial or residential drainage needs. Key Features: 12-inch plastic dome strainer with twist-lock attachment Outside diameter of 12-1/4″,...

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 C1-1852 is a 5-inch plastic replacement strainer designed for roof drains. It prevents debris from clogging drains and is built with a twist-and-lock friction-fit system. Constructed from durable black plastic, it provides a lightweight and economical solution for maintaining roof drainage systems. Key Features: 5-inch plastic dome strainer Twist-and-lock friction fit Black plastic construction for durability Outside diameter of 5-1/4″ and height of 5-3/4″ Economical replacement...

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 Marathon PVC Roof Drain with Poly Dome is a lightweight, corrosion-resistant solution designed for reroof and retrofit projects. Constructed from durable PVC, it is available in 3″, 4″, and 6″ outlet sizes. Each drain includes a PVC body and a protective poly dome strainer to keep debris from entering the drainage system while ensuring consistent water flow. Key Features: Available in 3″, 4″, and 6″ outlet sizes Lightweight, corrosion-resistant PVC construction Includes poly dome strainer...

The Marathon BS-1300 Aluminum Retrofit Ring & Dome is engineered as a durable and lightweight replacement component for retrofit roof drains. Its corrosion-resistant aluminum construction ensures long-lasting performance, while the dome design helps prevent debris from clogging drains. The dome measures 12-1/8″ in diameter with an overall height of 4-1/2″, making it a reliable solution for maintaining efficient roof drainage. Key Features: Aluminum retrofit dome with ring assembly Dome...

The Marathon BS-1045 Adjustable Drain Guard is a 13-1/2″ dome-style guard designed to protect roof drains from clogging. Built from corrosion-resistant aluminum, it provides durable, lightweight performance for commercial and industrial roof applications. Measuring 13-1/2″ (343 mm) outside diameter and 13″ (330 mm) overall length, this guard ensures reliable debris protection and proper drainage flow. Key Features: Large 13-1/2″ adjustable aluminum drain guard Dimensions: 13-1/2″ OD × 13″...

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 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 FF275-SCR Aluminum Fast Flow Roof Drain is designed for secure retrofit installations. Constructed with a heavy-gauge spun aluminum body, this model includes an ABS clamping ring, foam tape seal, and a 10-inch polyethylene strainer for reliable drainage. Featuring a 16-inch flange and 12-inch outlet, the FF275-SCR provides watertight performance and long service life for demanding roofing systems. Key Features: SKU FF275-SCR, Aluminum Fast Flow Drain with clamping ring and foam...

The Marathon C1-1858 is an economical 8-inch plastic strainer designed to protect roof drains from debris. Made from durable black plastic, it installs quickly using a twist-and-lock friction fit. Compact in size at 7-5/8″ outside diameter and 5-1/2″ in height, it provides a simple and cost-effective replacement solution that fits many applications. Key Features: Economical, fits many applications 8″ size with twist-and-lock friction fit design Black plastic construction Compact design for...

The Marathon FF375-SCR Aluminum Fast Flow Roof Drain is designed specifically for single-ply roofing systems. It features a heavy-gauge spun aluminum body, a new clamping ring style, and an expanding tape seal to prevent water backup. Each drain includes a poly dome and a bolt-in 10-inch polyethylene strainer. With a 16-inch flange, 12-inch outlet, and a 4-inch outlet size, the FF375-SCR offers a durable, watertight solution for roof drainage. Key Features: Quick and easy to install with...

The Marathon C1-3133 is a 12-inch cast aluminum strainer engineered to protect roof drains from clogging while maintaining smooth water flow. Built from durable, corrosion-resistant cast aluminum, it delivers long service life. With correct dimensions of 12-1/4″ outside diameter and 6″ height, this dome-style strainer is a practical, economical choice for large roof drain systems. Key Features: 12″ cast aluminum dome strainer Heavy-duty, corrosion-resistant construction Correct dimensions:...

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 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 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 Marathon BCTS29CR(E) is a 2-inch Copper-Tite retrofit roof drain featuring an extended anti-backup tape seal and a standard 10-inch ABS clamping ring. Constructed with a copper body and a 9-inch outlet length, this drain is designed for watertight performance in retrofit or reroofing jobs. It includes a 14-inch flange and a 10-inch polyethylene strainer for secure drainage and durability. Key Features: SKU BCTS29CR(E), Copper-Tite 2-inch retrofit drain with clamping ring and extended seal...

The Marathon BCTS39CR(E) Copper-Tite Drain is a 3-inch retrofit drain featuring a copper body, extended anti-backup tape seal, and 10-inch ABS clamping ring. Designed for reroof and retrofit installations, it provides watertight performance without disturbing the existing roof system. The drain includes a 10-inch polyethylene strainer, a 9-inch outlet length, and is available with either a 14-inch small flange or 18-inch large flange. Key Features: 3-inch outlet with extended anti-backup seal...

The Marathon C1-1870 is a 5-inch cast aluminum strainer designed to protect roof drains from debris. Built from corrosion-resistant aluminum, it provides superior durability compared to plastic alternatives. Measuring 5-1/4″ outside diameter by 5-3/4″ height, this dome-style strainer is economical, lightweight, and fits many roofing drain applications. Key Features: 5″ cast aluminum dome strainer Durable and corrosion resistant Lightweight yet strong construction 5-1/4″ OD × 5-3/4″ H...

The Marathon BS-1047 Adjustable Drain Guard is an extra-large dome-style guard designed to protect roof drains from clogging. Built from corrosion-resistant aluminum, it combines strength and lightweight performance for long-lasting durability. With dimensions of 18″ (457 mm) outside diameter and 13″ (330 mm) overall length, this adjustable guard is ideal for large roof drains in commercial and industrial settings. Key Features: Extra-large 18″ adjustable aluminum drain guard Dimensions: 18″...

Marathon Straight Rubber Couplings are flexible black PVC joiners designed to connect same-size pipe systems ranging from 2″ to 6″. Each coupling includes stainless steel clamps for a secure, leak-proof connection and is resistant to UV rays, chemicals, sewer gases, soil, and fungus. These couplings are versatile, easy to install, and suited for roof drains, waste systems, vent piping, and general plumbing repairs. Key Features: Available in 2″, 3″, 4″, 5″, and 6″ models (SKUs BC1-2415,...

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 Marathon BCTS29CR is a 2-inch Copper-Tite retrofit roof drain designed for watertight performance with a copper body and anti-backup tape seal. It includes a 10-inch ABS clamping ring and a 10-inch polyethylene strainer, making it ideal for reroof and retrofit applications. With a 14-inch small flange and 9-inch outlet length, this model ensures durability, reliability, and secure installation into existing piping. Key Features: 2-inch outlet with anti-backup tape seal Copper body with...

The Marathon C1-1890 is an 8-inch cast aluminum strainer designed for roof drains, providing strong debris protection with a dome-style construction. Made from corrosion-resistant cast aluminum, it is both lightweight and durable. With dimensions of 7-5/8″ outside diameter and 6-1/4″ height, it serves as an economical and reliable replacement for roof drainage systems. Key Features: 8″ cast aluminum dome strainer Dimensions: 7-5/8″ OD × 6-1/4″ H Durable, corrosion-resistant construction...

The Marathon BCTS49CR is a 4-inch Copper-Tite retrofit roof drain with a copper body, factory-applied tape seal, and clamping ring for watertight performance. It is designed for reroof and retrofit applications and includes a 10-inch ABS clamping ring and 10-inch polyethylene strainer. Available with a 14-inch small flange or an 18-inch large flange, the BCTS49CR features a 9-inch outlet length to fit securely into existing piping. Key Features: 4-inch retrofit drain with anti-backup tape seal...

The Marathon FF575-SCR Aluminum Fast Flow Roof Drain is built for single-ply roofing systems and retrofit applications. Featuring a heavy-gauge spun aluminum body, this drain includes a new clamping ring style, expanding foam tape seal, and a bolt-in 10-inch polyethylene strainer with poly dome included. With a 16-inch flange, 12-inch outlet, and 6-inch outlet size, the FF575-SCR ensures watertight performance and long-lasting durability. Key Features: Quick and easy to install with expanding...

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 Marathon CTS49CR(E) is a 4-inch Copper-Tite retrofit roof drain with extended anti-backup tape seal for enhanced watertight performance. This drain is built with a copper body, a 9-inch outlet length, and includes both a 10-inch ABS clamping ring and a 10-inch polyethylene strainer. Available with a 14-inch small flange or 18-inch large flange, the CTS49CR(E) is designed for reroof and retrofit applications where reliability and durability are critical. Key Features: 4-inch outlet with...

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 Economy Aluminum Roof Drain series (BFF175ECO through BFF575ECO) offers a cost-effective retrofit solution with a heavy gauge spun aluminum body and a simple bolt-down aluminum strainer. Designed without a clamping ring or seal, this series is intended for installations where basic drainage functionality is sufficient. All models include a 16-inch flange and 12-inch outlet, and are available in sizes 2″ through 6″. Key Features: Available in 2″, 3″, 4″, 5″, and 6″ sizes (SKUs...

The Marathon BCTS59CR is a 5-inch Copper-Tite retrofit drain engineered with a copper body, factory-applied tape seal, and ABS clamping ring for watertight performance. This model includes a 10-inch polyethylene strainer and features a 9-inch outlet length. Designed with an 18-inch large flange, the BCTS59CR provides secure, durable drainage in reroof and retrofit applications without disturbing existing roof systems. Key Features: 5-inch retrofit drain with anti-backup tape seal Heavy-duty...

The Marathon BCTS89CR is an 8-inch Copper-Tite retrofit drain with a copper body, factory-applied tape seal, and ABS clamping ring for watertight performance. Built for reroof and retrofit applications, this model provides durability with an 18-inch large flange and 9-inch outlet length. Each unit includes a 10-inch ABS clamping ring and 10-inch polyethylene strainer for a complete installation. Key Features: 8-inch retrofit drain with anti-backup tape seal Heavy-duty copper body construction...

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 Marathon Extended Aluminator Roof Drain series (BALUM2CRXL through BALUM6CRPXL) is a heavy gauge spun aluminum retrofit drain designed for extended outlet applications. It features a 22-inch drain outlet (plus approximately 2-inch protrusion with seal), a cast aluminum ring and strainer, and standard ProSeal mechanical seal to prevent backflow. Offered in sizes from 2″ to 6″, this drain includes options for PVC or TPO coated flange and delivers high flow performance under a peak water head...

The Marathon BCTS39CR is a 3-inch Copper-Tite retrofit drain with a copper body, factory-applied tape seal, and clamping ring for watertight performance. This model is ideal for reroof or retrofit applications and includes a 10-inch ABS clamping ring and 10-inch polyethylene strainer. The BCTS39CR is available with either a 14-inch small flange or an 18-inch large flange and features a 9-inch outlet length for compatibility with existing piping. Key Features: 3-inch retrofit drain with...

The Marathon Fast Pak Cast Iron Roof Drain (BS-1110FP for 3″, BS-1120FP for 4″) is a direct-connect roof drain made of cast iron, designed for easy installation directly from the roof deck without needing an under-deck clamp. It features a galvanized 18″×18″ extension/bearing flange, a molded polyethylene strainer bolted to a 10″ epoxy-coated aluminum clamping ring, and a flexible rubber expansion coupling. Ideal for use with steel, wood, concrete, or gypsum roof decks under single-ply or...

The Marathon Aluminator Pro Retrofit Roof Drain series (BALUM2CRPRO through BALUM6CRPRO) delivers heavy gauge spun aluminum construction with upgraded coated components. Each drain includes a coated 10″ aluminum clamping ring, coated 10″ aluminum Pro Dome security strainer, and ProSeal rubber mechanical seal. With a 16″ flange and 12″ outlet, the Pro series ensures strength, easy installation, and dependable water flow performance across sizes 2″ to 6″. Seal dimensions and flow rates are...

The Marathon Aluminum Gutter Drain retrofit series (BGUTTERALB variants) is designed for tight roof conditions such as gutters or corners where removal of existing drains is difficult. Constructed with a heavy gauge spun aluminum body, each drain includes options for ProSeal mechanical seal or tape seal, and choices between stainless steel snap-on flat grates or 5″ aluminum strainers. All models come with an 8″ × 8″ flange and a 12″ outlet, and are available in 3″ and 4″ sizes. Key Features:...

The Marathon Fast Pak PVC Roof Drain series (BS-1072FP, BS-1070FP, BS-1080FP) is designed for new installation or direct-connect scenarios and allows fast installation from the roof deck without an under-deck clamp. These drains include an injection-molded, UV-stabilized PVC body, a large 18″×18″ galvanized extension/bearing flange, epoxy-coated aluminum clamping ring, and molded polyethylene strainer. Available in 2-inch, 3-inch, and 4-inch outlet sizes, the Fast Pak PVC series adapts to...

The Marathon Poseidon SS Retrofit Roof Drains CI series (BSS3CI, BSS4CI, BSS5CI, BSS6CI) combine a stainless steel drain body with a cast iron ring and dome for maximum strength and durability. Designed for retrofit use, these drains feature a 17-gauge Type 304 stainless steel body, heavy cast iron ring and dome, and are supplied with a ProSeal rubber or tape seal. With a standard 16-inch flange and 12-inch outlet across all sizes, this series is built to deliver reliable performance in even...