Marathon Aluminator Retrofit Drain

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 retrofit roof drains, available in 3″, 4″, 5″, and 6″ sizes
• Heavy gauge spun aluminum body with cast aluminum clamping ring and strainer
• ProSeal rubber seal for reliable water back-up prevention
• Large 16-inch flange and 12-inch outlet length for secure membrane flashing
• High flow capacity under peak head conditions up to 3-1/4″

• Body material: Heavy gauge spun aluminum
• Clamping ring: Cast aluminum, 10-inch diameter
• Strainer: Aluminum strainer, 10-inch diameter, approximately 6-inch tall
• Seal: ProSeal mechanical rubber seal
• Flange diameter: 16 inches
• Outlet length: 12 inches
• Sizes available: 3″, 4″, 5″, 6″
• Flow capacity (at peak head ≤ 3-1/4″):
  • 3″ size: approx. 45 GPM
  • 4″ size: approx. 85 GPM
  • 5″ size: approx. 180 GPM
  • 6″ size: approx. 210 GPM

• Select the correct Aluminator size (3″, 4″, 5″, or 6″) to match the existing outlet pipe.
• Prepare the roof surface and clean the area around the existing drain.
• Position the new drain so the 16-inch flange sits flat against the roofing membrane.
• Install the ProSeal rubber seal securely into place.
• Attach the cast aluminum clamping ring and fasten the aluminum strainer.
• Flash the flange into the roof membrane or weld to the optional coated flange if specified.

Q: What sizes are available in the Aluminator series?
A: Sizes include 3″, 4″, 5″, and 6″.

Q: What materials are used in the construction?
A: The body is spun aluminum, the clamping ring is cast aluminum, the strainer is aluminum, and the seal is ProSeal rubber.

Q: What are the standard flange and outlet dimensions?
A: All models include a 16-inch flange and a 12-inch outlet.

Q: What is the flow capacity of each size?
A: At peak head ≤ 3-1/4″: 3″ drains approx. 45 GPM, 4″ drains approx. 85 GPM, 5″ drains approx. 180 GPM, and 6″ drains approx. 210 GPM.