1-778-759-9864
United States (USD $) flagUnited States (USD $)
BCFurnace
3" TO 4" INCREASER Metal Venting furnace part available in Vancouver, Burnaby, Port Moody, Langley, North Vancouver, Richmond, Maple Ridge, Delta, West Vancouver, New Westminster, Surrey, Coquitlam, Port Coquitlam, Pitt Meadows

3" TO 4" INCREASER Metal Venting

BCFURNACE

638-131

$16.00

+5% Tax • Shipping calculated at checkout.

U.S. Duties/Taxes, if applicable, may be due at time of delivery.

Name

3" TO 4" INCREASER

1units available

Pickup available at 75 Blue Mountain St #3

Usually ready in 24 hours

Secure Payment
Fast Delivery
Local Pickup

Product Details

Description

This premium 3-inch to 4-inch metal vent increaser is a professional-grade ducting adapter designed to transition smaller ventilation outlets to larger exhaust systems. Essential for HVAC installations, clothes dryer venting, and bathroom exhaust fans, this durable metal coupler ensures a secure and airtight fit between 3" and 4" pipes. Constructed from high-quality, heat-resistant metal, it is built to withstand the rigors of both hot and cold air exhaust, improving airflow efficiency throughout your home ventilation system. Whether you are performing a DIY repair or a new appliance installation, this duct increaser helps bridge the gap between varying duct sizes while maintaining optimal pressure and reducing lint or debris buildup.

Specifications

Type
Metal Venting / Ducting Adapter
Size
3 inch to 4 inch
Dimensions
4 inches × 3 inches
Application
Commonly used in clothes dryers, bathroom exhaust fans, range hoods, and general HVAC ductwork to transition from a 3-inch appliance outlet or pipe to a standard 4-inch ventilation line.
Specifications
Heavy-duty metal construction for enhanced durability and heat resistance; crimped on one end for easy installation; compatible with rigid and semi-rigid ducting.

You Might Also Like

Compatible parts and related replacements

Browse all parts
4" TO 5" INCREASER Metal Venting furnace part available in Vancouver, Burnaby, Port Moody, Langley, North Vancouver, Richmond, Maple Ridge, Delta, West Vancouver, New Westminster, Surrey, Coquitlam, Port Coquitlam, Pitt Meadows

638-108

4" TO 5" INCREASER Metal Venting

$15.00
7" TO 8" INCREASER Metal Venting furnace part available in Vancouver, Burnaby, Port Moody, Langley, North Vancouver, Richmond, Maple Ridge, Delta, West Vancouver, New Westminster, Surrey, Coquitlam, Port Coquitlam, Pitt Meadows

638-048

7" TO 8" INCREASER Metal Venting

$52.00
6" TO 7" INCREASER Metal Venting furnace part available in Vancouver, Burnaby, Port Moody, Langley, North Vancouver, Richmond, Maple Ridge, Delta, West Vancouver, New Westminster, Surrey, Coquitlam, Port Coquitlam, Pitt Meadows

638-047

6" TO 7" INCREASER Metal Venting

$44.00
4" X 36" GALVANIZED PIPE 26 GA PER FOOT Metal Venting furnace part available in Vancouver, Burnaby, Port Moody, Langley, North Vancouver, Richmond, Maple Ridge, Delta, West Vancouver, New Westminster, Surrey, Coquitlam, Port Coquitlam, Pitt Meadows

638-407

4" X 36" GALVANIZED PIPE 26 GA PER FOOT Metal Venting

$14.00
4" X 60 GALVANIZED PIPE 30 GA (PER FOOT) Metal Venting furnace part available in Vancouver, Burnaby, Port Moody, Langley, North Vancouver, Richmond, Maple Ridge, Delta, West Vancouver, New Westminster, Surrey, Coquitlam, Port Coquitlam, Pitt Meadows

638-412

4" X 60 GALVANIZED PIPE 30 GA (PER FOOT) Metal Venting

$3.00
4" TO 5" B-VENT INCEASER Metal Venting furnace part available in Vancouver, Burnaby, Port Moody, Langley, North Vancouver, Richmond, Maple Ridge, Delta, West Vancouver, New Westminster, Surrey, Coquitlam, Port Coquitlam, Pitt Meadows

638-105

4" TO 5" B-VENT INCEASER Metal Venting

$28.00
5" - 6" B-VENT INCREASER Metal Venting furnace part available in Vancouver, Burnaby, Port Moody, Langley, North Vancouver, Richmond, Maple Ridge, Delta, West Vancouver, New Westminster, Surrey, Coquitlam, Port Coquitlam, Pitt Meadows

638-152

5" - 6" B-VENT INCREASER Metal Venting

$41.00
6" X 6" X 6" TEE Metal Venting furnace part available in Vancouver, Burnaby, Port Moody, Langley, North Vancouver, Richmond, Maple Ridge, Delta, West Vancouver, New Westminster, Surrey, Coquitlam, Port Coquitlam, Pitt Meadows

638-606

6" X 6" X 6" TEE Metal Venting

$18.00
4" X 36" GALVANIZED PIPE 30 GA PER FOOT Metal Venting furnace part available in Vancouver, Burnaby, Port Moody, Langley, North Vancouver, Richmond, Maple Ridge, Delta, West Vancouver, New Westminster, Surrey, Coquitlam, Port Coquitlam, Pitt Meadows

638-409

4" X 36" GALVANIZED PIPE 30 GA PER FOOT Metal Venting

$3.00
5-4 SIS REDUCER L/E-L/E 26GA Metal Venting furnace part available in Vancouver, Burnaby, Port Moody, Langley, North Vancouver, Richmond, Maple Ridge, Delta, West Vancouver, New Westminster, Surrey, Coquitlam, Port Coquitlam, Pitt Meadows

638-455

5-4 SIS REDUCER L/E-L/E 26GA Metal Venting

$14.00
3" CAMSTAT ADJUSTABLE FAN OFF TEMPERATURE F90-F120 AND LIMIT SWITCH UPGRADE 3 High Limit Control Switches furnace part available in Vancouver, Burnaby, Port Moody, Langley, North Vancouver, Richmond, Maple Ridge, Delta, West Vancouver, New Westminster, Surrey, Coquitlam, Port Coquitlam, Pitt Meadows

543-503

3" CAMSTAT ADJUSTABLE FAN OFF TEMPERATURE F90-F120 AND LIMIT SWITCH UPGRADE 3 High Limit Control Switches

$195.00
NUTECH, LIFEBREATH DIGITAL ELECTRONIC TIMER D.E.T. 99-104 (OBSOLETE, REPLACEMENT AVAILABLE) Electrical, Transformers, Relay furnace part available in Vancouver, Burnaby, Port Moody, Langley, North Vancouver, Richmond, Maple Ridge, Delta, West Vancouver, New Westminster, Surrey, Coquitlam, Port Coquitlam, Pitt Meadows

872-053

NUTECH, LIFEBREATH DIGITAL ELECTRONIC TIMER D.E.T. 99-104 (OBSOLETE, REPLACEMENT AVAILABLE) Electrical, Transformers, Relay

$50.00
BLOWER BEARINGS ECCENTRIC 3/4" (PER PAIR) Blower Belts, Shaft, Pulley, Bearing furnace part available in Vancouver, Burnaby, Port Moody, Langley, North Vancouver, Richmond, Maple Ridge, Delta, West Vancouver, New Westminster, Surrey, Coquitlam, Port Coquitlam, Pitt Meadows

235-200

BLOWER BEARINGS ECCENTRIC 3/4" (PER PAIR) Blower Belts, Shaft, Pulley, Bearing

$67.00
YORK CONTROL BOARD SIMPLICITY ELITE MILLENNIUM Control Board, Circuit, Ignition Modulating furnace part available in Vancouver, Burnaby, Port Moody, Langley, North Vancouver, Richmond, Maple Ridge, Delta, West Vancouver, New Westminster, Surrey, Coquitlam, Port Coquitlam, Pitt Meadows

121-438

YORK CONTROL BOARD SIMPLICITY ELITE MILLENNIUM Control Board, Circuit, Ignition Modulating

$3,977.00
3/4" PEX RING Copper Fittings furnace part available in Vancouver, Burnaby, Port Moody, Langley, North Vancouver, Richmond, Maple Ridge, Delta, West Vancouver, New Westminster, Surrey, Coquitlam, Port Coquitlam, Pitt Meadows

263-019

3/4" PEX RING Copper Fittings

$1.00
TRANE PRESSURE SWITCH -0.90" WC Air Pressure Switch, Air Proving furnace part available in Vancouver, Burnaby, Port Moody, Langley, North Vancouver, Richmond, Maple Ridge, Delta, West Vancouver, New Westminster, Surrey, Coquitlam, Port Coquitlam, Pitt Meadows

773-163

TRANE PRESSURE SWITCH -0.90" WC Air Pressure Switch, Air Proving

$79.00
YORK LUXAIRE COLEMAN HOT SURFACE IGNITOR 120V Hot Surface Ignitors furnace part available in Vancouver, Burnaby, Port Moody, Langley, North Vancouver, Richmond, Maple Ridge, Delta, West Vancouver, New Westminster, Surrey, Coquitlam, Port Coquitlam, Pitt Meadows

468-704

YORK LUXAIRE COLEMAN HOT SURFACE IGNITOR 120V Hot Surface Ignitors

$121.00
LENNOX/ARMSTRONG/DUCANE/AIRE FLO HOT SURFACE IGNITOR 120V Hot Surface Ignitors furnace part available in Vancouver, Burnaby, Port Moody, Langley, North Vancouver, Richmond, Maple Ridge, Delta, West Vancouver, New Westminster, Surrey, Coquitlam, Port Coquitlam, Pitt Meadows

468-007

LENNOX/ARMSTRONG/DUCANE/AIRE FLO HOT SURFACE IGNITOR 120V Hot Surface Ignitors

$136.00
ARMSTRONG LENNOX DUCANE DRAFT INDUCER BLOWER MOTOR 2 STAGE 1/20HP 115V Inducer Motor, Assembly, Venter, Draft, Exhaust Fan Fasco, Combustion Air Blower furnace part available in Vancouver, Burnaby, Port Moody, Langley, North Vancouver, Richmond, Maple Ridge, Delta, West Vancouver, New Westminster, Surrey, Coquitlam, Port Coquitlam, Pitt Meadows

463-126

ARMSTRONG LENNOX DUCANE DRAFT INDUCER BLOWER MOTOR 2 STAGE 1/20HP 115V Inducer Motor, Assembly, Venter, Draft, Exhaust Fan Fasco, Combustion Air Blower

$557.00
GOODMAN AMANA CONTROL BOARD Control Board, Circuit, Ignition Modulating furnace part available in Vancouver, Burnaby, Port Moody, Langley, North Vancouver, Richmond, Maple Ridge, Delta, West Vancouver, New Westminster, Surrey, Coquitlam, Port Coquitlam, Pitt Meadows

446-058

GOODMAN AMANA CONTROL BOARD Control Board, Circuit, Ignition Modulating

$476.00
SUPERHOT BOILER ZONE CONTROL BOARD INC. E, N & PS MODELS Control Board, Circuit, Ignition Modulating furnace part available in Vancouver, Burnaby, Port Moody, Langley, North Vancouver, Richmond, Maple Ridge, Delta, West Vancouver, New Westminster, Surrey, Coquitlam, Port Coquitlam, Pitt Meadows

446-000

SUPERHOT BOILER ZONE CONTROL BOARD INC. E, N & PS MODELS Control Board, Circuit, Ignition Modulating

$533.00

Frequently Asked Questions

Is the 638-131 a genuine OEM part?
Yes, the 638-131 is a genuine OEM replacement part manufactured by BCFurnace. We source all Metal Venting from authorized distributors to ensure exact-fit compatibility. This Metal Venting is backed by our 100% compatibility guarantee — if it doesn't fit your furnace, we'll make it right.
How do I know if the 638-131 is compatible with my BCFurnace furnace?
The easiest way is to match the part number (638-131) with your furnace model number. Visit the BCFurnace page on our site and enter your model number in the search bar — our system will show all compatible Metal Venting for your specific unit. You can also call our technicians at 1-778-759-9864 for free compatibility verification.
How fast can I get the 638-131 shipped?
Most Metal Venting including the 638-131 ship within 1–2 business days from our warehouse. We ship across Canada and the United States with tracking on every order. For urgent BCFurnace repairs, contact us at 1-778-759-9864 for expedited shipping options.
Can I pick up the 638-131 at your store?
Yes! Local pickup is available at our Coquitlam, BC location: 75 Blue Mountain St #3. Metal Venting orders are usually ready within 24 hours. Call us at 1-778-759-9864 to confirm the 638-131 is in stock before visiting.

Looking for more Metal Venting?

Browse Metal VentingSearch Metal Venting