Metal-Fab 5″ x 18″ B-Vent Pipe HVAC Round Double Wall Gas Vent Flue MFG# 5M18

SKU: MFG# 5M18

Weight	3 lbs
Dimensions	20 × 6 × 6 in

$41.23

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	$41.23	0%
5–9	$39.17	5%
10+	$37.11	10%

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Metal-Fab 5" x 18" B-Vent Pipe HVAC Round Double Wall Gas Vent Flue MFG# 5M18

Specifications & product details

Overview

Metal-Fab 5" x 18" B-Vent Double Wall Round Pipe – Gas Flue for HVAC Venting (MFG# 5M18)Designed for safe, efficient venting of Category I gas-burning appliances, this Metal-Fab 5" x 18" B-Vent Round Pipe offers high-performance construction with a double-wall design. The inner aluminum alloy wall provides corrosion resistance, while the outer galvanized steel layer adds durability and strength.

The twist-lock feature enables secure, tool-free installation and allows easy integration with other Metal-Fab B-Vent components. It maintains a 1" clearance to combustible materials and supports natural gas and propane systems in both residential and commercial HVAC setups.

Key Specs:

Diameter: 5"

Length: 18"Double-Wall Construction for Heat InsulationTool-Free Twist-to-Lock Assembly

Compatible with Metal-Fab elbows, adapters, and vent capsUL Listed for Safety Compliance

Product details

Part / SKU	MFG# 5M18

Package includes

Metal-Fab 5" x 18" B-Vent Pipe HVAC Round Double Wall Gas Vent Flue MFG# 5M18

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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Shipping & availability

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