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Square galvanized steel roof curb adapter, 26 by 21 1/2 inches, 18 gauge, 5 inches tall

Dayton

Dayton 3AZK9 Roof Curb Adapter 26 in 21 1/2 in 18 ga

SKU CH-VZGW-T4YGG MPN 3AZK9

Galvanised steel adapter increases a 22 in fan base to fit a 26 in roof curb and includes mounting hardware

  • Product typeDrain Components
  • Adapts a 22 in fan base to fit a 26 in roof curb
  • Galvanized steel construction resists corrosion for long service life
  • Includes eight 1/4-20 Tinnerman speed nuts and bolts for secure mounting
  • 18 gauge metal thickness provides structural rigidity across the adapter
  • Suitable for downblast, filtered supply and upblast fan types

Roof Curb Adapter for Downblast and Upblast Fans

This galvanized steel adapter connects a 21 1/2 in fan base to a 26 in roof curb. It is designed for downblast, filtered supply and upblast fan types. The 18 ga construction provides structural rigidity for rooftop installations. Included hardware uses 1/4-20 fasteners for secure mounting.

Installers Adapting 22 in Fan Bases to 26 in Curbs

The adapter suits contractors who need to bridge a 22 in fan base onto a larger 26 in curb without replacing the curb. It is not for installers working with smaller curb sizes or different fan base dimensions. Buyers requiring a reducer rather than an increaser should look at other configurations.

18 ga Galvanized Steel with 5 in Overall Height

The 18 gauge galvanized steel thickness determines corrosion resistance and load capacity for the roof penetration. The 5 in overall height and 2 1/2 in top flange set the installed profile above the curb. Verify these dimensions match the roof assembly before ordering.

How it compares

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

Price $283.99
Pricier than about 89% of the 4,240 comparable items (median $31.99).

Specifications

Product
Brand nameDayton
Model name3AZK9
Product typeDrain Components

Questions about this item

What size roof curb must already be installed for the 26 in adapter to fit?

The adapter is designed for a 26 in square outside-dimension curb.

Will the 21 1/2 in fan base on my existing downblast fan match the adapter's fan side?

Yes, the fan side width is 21 1/2 in and adapts a 22 in fan base to the larger curb.

How can I confirm the 18 ga steel adapter is seated correctly after bolting it down?

The top flange height should measure 2 1/2 in and the overall height 5 in when fully fastened.

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