Marathon Roofing Products - Economy Aluminum Roof Drain

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 BFF-175ECO through BFF-575ECO)
• Heavy gauge spun aluminum body
• Bolt-down aluminum strainer (7.5″ diameter × 4″ tall)
• Large 16″ flange and 12″ outlet for flashing compatibility
• Optional PVC or TPO coating for the flange

• Body material: Heavy gauge spun aluminum

• Flange diameter: 16″

• Outlet length: 12″

• Strainer: Aluminum, 7.5″ diameter × 4″ tall

• Sizes and fitting pipe interior diameters:
  • 2″ model fits 1 3/4″ to 2 1/4″ pipe ID
  • 3″ model fits 2 7/8″ to 3 1/4″ pipe ID
  • 4″ model fits 3 7/8″ to 4 1/4″ pipe ID
  • 5″ model fits 4 7/8″ to 5 1/4″ pipe ID
  • 6″ model fits 5 7/8″ to 6 1/4″ pipe ID

• Select the correct size model (2″-6″) matching your existing drain pipe.
• Remove the old drain cover and clean the roof deck around the drain opening.
• Place the Economy Aluminum drain body so the 16″ flange lies flat over the roofing membrane.
• Bolt the aluminum strainer (7.5″ × 4″) down onto the drain body.
• If required, apply PVC or TPO coating to the flange to match your membrane.

Q: Does the Economy Aluminum series come with a clamping ring or seal?
A: No, this series is offered without a clamping ring and without a back-up seal.

Q: What material are these drains made from?
A: They are constructed from heavy gauge spun aluminum.

Q: What are the flange and outlet dimensions for all models?
A: Each model includes a 16″ diameter flange and a 12″ outlet.

Q: What sizes are offered, and what pipe IDs do they fit?
A: The sizes are 2″, 3″, 4″, 5″ and 6″. Each fits a range of pipe interior diameters (e.g. 2″ fits 1¾-2¼″, 3″ fits 2⅞-3¼″, etc.).

Q: Are there coating options available?
A: Yes — PVC or TPO coating for the flange is optional.