METAL-FAB 4MIX5 Increaser 4″ to 5″ Galvanized Vent Pipe Adapter Gas HVAC

Name: METAL-FAB 4MIX5 Increaser 4" to 5" Galvanized Vent Pipe Adapter Gas HVAC
SKU: 4MIX5
Price: 54.26 USD
Availability: InStock

SKU: 4MIX5

$54.26

In stock

Same-item volume pricing

Quantity	Unit price	Saving
1–4	$54.26	0%
5–9	$51.55	5%
10+	$48.83	10%

Estimate for this quantity before shipping. Tax display follows store settings. Existing cart quantities can increase the tier. Only one offer applies; a coupon replaces automatic pricing. For 20+ units, contact support for a quote.

Available to order: 22.

Bulk quantity & quote

Quantity needed

Enter the total quantity you need. We will confirm availability and a quote before you order.

Request this quantity →

Product Description

Overview

METAL-FAB 4MIX5 Increaser – 4″ to 5″ Vent Pipe Adapter – B-Vent CompatibleThe METAL-FAB 4MIX5 vent pipe increaser transitions your venting system from 4” to 5”, allowing for proper gas appliance installation and code-compliant airflow. Constructed of corrosion-resistant galvanized steel, it’s built for durability in propane, LP gas, or natural gas appliance exhaust applications.

Key Features

Vent Pipe Size: 4” x 5”Material: Heavy-duty galvanized steelApplication: Natural draft venting for gas water heaters, furnaces, and boilersCompatibility: Designed for use with Metal-Fab B-Vent and other standard UL-listed vent pipeInstall Type: Twist-lock and crimped for secure fit — no fasteners neededIdeal for HVAC techs and installers working in residential and commercial gas venting systems. This increaser helps correct sizing transitions while maintaining airflow and backdraft protection.

Product details

Part / SKU	4MIX5

Package includes

METAL-FAB 4MIX5 Increaser 4" to 5" Galvanized Vent Pipe Adapter Gas HVAC

Included components and any stated pack quantity are as described in this listing. Optional accessories shown separately are sold separately unless expressly included above.