Shop All Savings
Appliances
Bath & Faucets
Blinds & Window Treatment
Building Materials
Lumber & Composites
Cleaning
Decor & Furniture
Lighting & Ceiling Fans
Doors & Windows
Electrical
Flooring & Area Rugs
Hardware
Heating & Cooling
Kitchen & Kitchenware
Lawn & Garden
Outdoor Living & Patio
Paint
Plumbing
Seasonal Decor
Smart Home
Storage & Organization
Tools
Automotive
Furniture
Gift Cards
Credit Cards
View All Home Services
Tool Rental
Benefits & Services For the Pro
Project Calculators
View All DIY Projects
Local Ad
Store Finder
Site Map
#1 Home Improvement Retailer
Select store
...
...
Cart
Select store
...
...
Shop All
Services
DIY
Me
Cart
...
Home
/
Heating, Venting & Cooling
/
HVAC Supplies
/
Ducting & Venting
/
Transitions & Connectors
/
Reducers
Reducers
2 Results
Product Width (in.): 4 in
Sort by:
Top Sellers
Top Sellers
Most Popular
Price Low to High
Price High to Low
Top Rated Products
Get It Fast
In Stock at Store Today
Same-Day Delivery
Availability
Show Unavailable Products
Department
Heating, Venting & Cooling
HVAC Supplies
Ducting & Venting
Transitions & Connectors
Reducers
Featured Keywords
3 in. pipe
4 in. pipe
4 in. x 3 in. round reducer
pipe size
30 gauge
duct run
duct tape
galvanized steel construction
hvac system
snug fit
+ View All
$
11
.
28
(279)
Master Flow
4 in. to 3 in. Round Reducer
Add to Cart
Compare
$
13
.
50
(69)
Master Flow
4 in. to 3 in. 26-Gauge Round Reducer
Add to Cart
Compare