METAL-FAB 3″x12″ Adjustable B-Vent Pipe MFG# 3M12A HVAC Flue Gas Vent UL

SKU: MFG#3M12-d24fr9

Weight	2 lbs
Dimensions	17 × 10 × 5 in

$29.81

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	$29.81	0%
5–9	$28.32	5%
10+	$26.83	10%

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METAL-FAB 3"x12" Adjustable B-Vent Pipe MFG# 3M12A HVAC Flue Gas Vent UL

Specifications & product details

Overview

METAL-FAB 3M12A 3"x12" Adjustable B-Vent Pipe – HVAC Double-Wall Flue DuctThis UL-listed adjustable B-Vent pipe by METAL-FAB is designed to provide efficient flue venting for gas-burning appliances in residential and commercial HVAC systems. With a 3-inch diameter and adjustable 12-inch extension length, this pipe accommodates tight or variable-length installations while maintaining safe and code-compliant performance.

Manufactured with a durable aluminum inner wall and galvanized steel outer shell, the 3M12A B-Vent pipe includes a slip-joint design for seamless field adjustment and a reliable twist-lock mechanism for secure assembly. Perfect for gas furnaces, water heaters, and boilers.

Highlights

Double-wall aluminum/steel construction for safety & heat resistanceAdjustable telescoping length for flexible installationsSlip-fit design simplifies retrofit & tight-space work
Rated for natural gas and propane appliance flue gas exhaustQuick, tool-free locking connection

Product details

Part / SKU	MFG#3M12-d24fr9

Package includes

METAL-FAB 3"x12" Adjustable B-Vent Pipe MFG# 3M12A HVAC Flue Gas Vent UL

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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