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Galvanized steel roof curb adapter, 17 inch square base tapering to 18 1/2 inch top flange, 5 inches tall with mounting hardware

Dayton

Dayton 3AZK1 17 in Roof Curb Adapter Trap

SKU CH-1VJB-ARMC8 MPN 3AZK1

Adapts an 18 1/2 in fan base to fit a 17 in roof curb using galvanized steel construction with included fasteners

  • Product typeDrain Components
  • Adapts 19 in fan base to 17 in roof curb
  • Galvanized steel construction resists corrosion
  • 18 gauge metal thickness adds rigidity
  • Includes 8 speed nuts and 8 bolts for secure mounting
  • 5 in overall height with 2 1/2 in top flange

Roof Curb Adapter for Downblast Fans

The Dayton 3AZK1 is a steel roof curb adapter that reduces an eighteen and a half inch fan base to fit a seventeen inch curb. It suits installers mounting downblast, filtered supply or upblast fans on existing roof openings. The galvanized finish resists corrosion in outdoor conditions.

Galvanized Steel Build with Included Hardware

Eighteen gauge steel forms the adapter body, standing five inches tall with a two and a half inch top flange. Each side uses two fasteners, and the package supplies eight quarter-twenty Tinnerman speed nuts plus eight matching bolts. The hardware allows a secure, bolted connection without extra trips to the supply house.

Verify Fan Base and Curb Dimensions First

Confirm the fan base measures eighteen and a half inches square and the roof curb opening is seventeen inches square before ordering. The adapter only bridges this specific size difference and will not suit other curb or fan dimensions. Ensure the roof structure can accept the bolt pattern and flange height.

How it compares

Measured against everything we stock in Drain Stoppers, Strainers & Traps, at today’s prices. Recalculated every night.

Price $241.99
Pricier than about 87% of the 4,240 comparable items (median $31.99).

Specifications

Product
Brand nameDayton
Model name3AZK1
Product typeDrain Components

Questions about this item

What curb size does the 17 in adapter fit?

The adapter reduces an 18 1/2 in fan base to fit a 17 in roof curb.

What fasteners come with the 3AZK1 adapter?

Eight 1/4-20 Tinnerman speed nuts and eight 1/4-20 x 3/4 bolts are included.

How do you mount the adapter to the fan base?

Align the 18 1/2 in flange with the fan base and secure using two bolts per side through the pre-drilled holes.

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