METAL-FAB 4″ x 48″ Oval Type B Gas Vent Pipe Double Wall HVAC Duct MFG# 4MO4

SKU: MFG# 4MO4

Weight	5 lbs
Dimensions	50 × 6 × 6 in

$82.80

In stock — available to order.

Sold individually. Each quantity ordered is one unit. Kits are one complete kit; products sold by length use the stated length unit.

Same-item volume pricing

Quantity	Unit price	Saving
1–4	$82.80	0%
5–9	$78.66	5%
10+	$74.52	10%

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METAL-FAB 4" x 48" Oval Type B Gas Vent Pipe Double Wall HVAC Duct MFG# 4MO4

Specifications & product details

Overview

METAL-FAB 4MO4 – 4" x 48" Oval Type B Gas Vent Pipe | Double Wall HVAC Venting for LP & NG SystemsThis 4" x 48" METAL-FAB Oval Type B Vent Pipe (MFG# 4MO4) is designed for efficient venting of Category 1 gas-burning appliances such as furnaces and water heaters running on propane (LP) or natural gas.

Featuring a double-wall construction with an aluminum inner flue and galvanized steel outer casing, this pipe offers excellent heat resistance, corrosion protection, and safety when installed with a minimum 1” clearance to combustible materials.

The oval profile allows for easy installation within 2" x 4" or 2" x 6" stud walls, making it ideal for tight or retrofitted spaces.

Key Features

Pipe
Size: 4" Diameter x 48" LengthShape: Oval
Material: Galvanized Steel (outer), Aluminum Alloy (inner)Application: LP/Natural Gas Appliance Flue VentingCategory 1 Appliance Rated
Model: 4MO4
Brand: METAL-FAB

Condition

Brand New

Compatible with other METAL-FAB B-Vent componentsEngineered to meet modern building codes and HVAC installation needs, this vent pipe delivers performance and safety in residential or light commercial environments.

Product details

Part / SKU	MFG# 4MO4

Package includes

METAL-FAB 4" x 48" Oval Type B Gas Vent Pipe Double Wall HVAC Duct MFG# 4MO4

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

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