Strainers, Drain Guards and Rings

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 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 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 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 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 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 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″...

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 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...