Adapters and Reducers

Make every transition seamless. Adapters and reducers step between duct sizes, shapes, and connection types — including rectangular-to-round — while protecting airflow, static pressure, and system balance.

Adapters and reducers let you transition between duct sizes, shapes, and connection types without compromising system performance. Whether you're stepping down trunk-line diameter as branches split off, or transitioning from rectangular to round ductwork, these fittings are engineered to maintain airflow and static pressure targets through the change. They're a small component with an outsized impact on system balancing — the wrong transition can create pressure loss and uneven airflow across the whole system.

Engineered Transitions

Engineered to maintain airflow and static pressure through size and shape transitions.

Balances the Whole System

Supports proper system balancing across trunk lines and branch runs.

Rectangular-to-Round Options

Includes rectangular-to-round transitions for flexible system design.

Adapters and Reducers

US Duct can adapt your duct to anything — a machine, a hose, or any outlet; however, there are some standard adapters.

different kinds of gates

different kinds of BUTTERFLY gates

Benefits

Leak Free?

Available in Auto

Fully Fabricated

Half Cut Off Option

Available fully in SS

Limit Switch Option

Sizes Available

Green checkmark icon inside a white circle with a green outline.

3"-24"

Mini Leak Gate

Green checkmark icon inside a white circle with a green outline.

*across the blade

Green checkmark icon inside a white circle with a green outline.
Green checkmark icon inside a white circle with a green outline.
Green checkmark icon inside a white circle with a green outline.

3"-8"

Green checkmark icon inside a white circle with a green outline.

*to the atmosphere

Green checkmark icon inside a white circle with a green outline.
Green checkmark icon inside a white circle with a green outline.
Green checkmark icon inside a white circle with a green outline.
Green checkmark icon inside a white circle with a green outline.

3"-24"

Green checkmark icon inside a white circle with a green outline.

3"-38"

Green checkmark icon inside a white circle with a green outline.
Green checkmark icon inside a white circle with a green outline.
Green checkmark icon inside a white circle with a green outline.
Green checkmark icon inside a white circle with a green outline.

3”-32”

Available fully in SS

Great for use high up in the air

Available w/ half moon stops and gaskets & Oil Light Bushings (adder)

Safe for systems with particles going through the duct

Locking Quadrant

Limit Switch available (adder)

Reed Switch Available (adder)

Sizes Available

Green checkmark icon inside a white circle with a green outline.
Green checkmark icon inside a white circle with a green outline.

3"-54"

AUTO BUTTERFLY

Green checkmark icon inside a white circle with a green outline.
Green checkmark icon inside a white circle with a green outline.
Green checkmark icon inside a white circle with a green outline.
Green checkmark icon inside a white circle with a green outline.

3"-54"

WEIGHTED BUTTERFLY

Green checkmark icon inside a white circle with a green outline.
Green checkmark icon inside a white circle with a green outline.

3"-54"

CHAIN OPERATED BUTTERFLY

Green checkmark icon inside a white circle with a green outline.
Green checkmark icon inside a white circle with a green outline.
Green checkmark icon inside a white circle with a green outline.
Green checkmark icon inside a white circle with a green outline.

3"-54"

Wondering which gate/butterfly gates fits best for your needs? Talk to your Duct guy at (336)-904-0112

These include hose adapters, machine adapters, and adapters to transition from one connection type to another including:

  • Flange to rolled-lip
  • Rolled-lip to raw end
  • Rolled-lip to US Tubing
  • US Tubing to Flange
  • US Tubing to raw end
  • Square to round adapters/transitions


RECLAIM YOUR TIME


Woodworkers and shop employees can spend 30 min/day, 2.5 hours/week, 180 hours/year JUST on changing out bags from your open baghouse waste collector. Why spend all that time and money changing out bags when you can be making more money? That's where our baghouse comes in.

WASTE MANAGEMENT Solutions Tailored for Small TO LARGE Shops

At US Duct, we understand ALL owner's time constraints in managing a shop. Whether you run a woodshop, metal fabrication shop, or manufacturing facility, we offer high-quality, cost-effective solutions designed to fit your space, improve your workflow, and grow your business.

Close-up of a person holding a wooden plank in a woodworking workshop.
Industrial grain or powder processing machine in a warehouse with shelves of organized storage bins in the background.

Why Small Shops Choose US Duct

We’re not just a supplier, but your trusted partner for ductwork solutions that grow with your shop. Small shop owners choose US Duct because we deliver:

  • Personalized Solutions: Every duct system is tailored to your needs.

  • Fast Turnaround Times: Get your system quickly and reduce downtime.

  • Expert Advice: Our team is here to guide you every step of the way.

Products

Lorem ipsum dolor sit amet, consectetur adipiscing elit.

Products in this collection

Flanged Connection Adapter

Connection Adapter

Connection adapters are used to switch from one connection type to another.

Hose Adapter

Hose Adapters

Hose adapters are used to connect the duct to flex hose.

Machine Adapter

Machine Adapters

Machine adapters are made to adapt the duct to a machine.

Our Promise

To you

Our commitment is to your success. We believe in building lasting partnerships where your growth fuels ours. We're here to support your business with the best in ductwork solutions,helping you achieve more every step of the way.

Laughing fabrication team in the shop.

Talk to a Duct Guy or Gal

Get started on a solution tailored to your needs, or explore our range of inline separators, self-dumping hoppers, and baghouses for even more ways to optimize your workspace.

Talk to a Duct Guy or Gal

Get started on a solution tailored to your needs, or explore our range of inline separators, self-dumping hoppers, and bag houses for even more ways to optimize your workspace.