4BV24 – DuraVent 4″ × 24″ Type B Gas Vent Pipe

4BV24 DuraVent Type B Gas Vent Pipe

4BV24 by DuraVent is a 4-inch by 24-inch Type B gas vent pipe designed for compatible listed gas-fired appliances. This straight vent section provides additional vertical or horizontal length within a properly sized and approved DuraVent Type B system.

Its factory-engineered double-wall construction helps create a dependable passage for removing combustion gases. The product should only be installed with compatible DuraVent components and according to the appliance instructions, vent manufacturer requirements and applicable local codes.

4BV24 Double-Wall Construction

The 4BV24 uses the double-wall construction associated with DuraVent Type B gas vent systems. An aluminum inner liner carries the combustion gases, while a galvanized steel exterior provides additional protection and structural support.

This construction helps the vent warm rapidly during appliance operation. Maintaining suitable temperatures inside a properly configured vent can support natural draft and help limit excessive condensation.

The pipe has a nominal internal diameter of 4 inches and a total length of 24 inches. The two-foot length makes it a practical option when a vent system requires a longer straight section with fewer connections.

Type B Gas Vent Application

The 4BV24 is intended specifically for compatible Type B gas vent applications. It may only be connected to appliances and venting systems approved for this type of product.

Do not use this pipe for wood-burning appliances, solid-fuel equipment or systems requiring another chimney classification. High-efficiency condensing furnaces and water heaters may require specialized plastic, polypropylene or stainless-steel venting rather than Type B pipe.

Check the appliance rating plate and installation manual before selecting any venting product. The documentation should identify the approved vent type, required diameter, clearances and termination configuration.

Four-Inch Diameter and 24-Inch Length

The 4BV24 has a nominal inside diameter of 4 inches and a length of 24 inches. This size is intended for compatible venting systems designed around 4-inch Type B components.

Vent diameter must not be selected solely from the size of the appliance outlet. Appliance input capacity, vent height, lateral distance, number of fittings and common-vent configuration may affect the required diameter.

A qualified HVAC professional should complete or verify the vent-sizing calculation. An incorrectly sized vent may affect appliance operation, natural draft and the safe removal of combustion gases.

Longer Straight Vent Section

The 24-inch length of the 4BV24 can reduce the number of individual pipe sections required across a straight vent run. Fewer connections may simplify installation when the longer section fits the available space.

Do not cut, shorten, drill through or otherwise modify the pipe. Type B vent sections are factory manufactured as part of a listed system, and unauthorized alterations may damage their double-wall construction or affect their listing.

Compatible DuraVent Components

The 4BV24 should be joined only to compatible 4-inch DuraVent Type B gas vent products. A complete vent system may require elbows, supports, firestops, roof flashing, additional pipe sections and an approved termination cap.

Do not combine incompatible products simply because they have the same nominal diameter. Different vent systems may use different locking mechanisms, exterior dimensions, clearance requirements and safety listings.

Every connection should be fully engaged and secured according to current DuraVent instructions. After assembly, inspect the entire vent route to ensure that the components remain aligned and adequately supported.

Professional Installation Required

The 4BV24 should be installed by a qualified professional familiar with gas-fired appliances and Type B gas vent systems. The installer must verify vent sizing, required clearances, supports, offsets, firestops, roof penetration and termination requirements.

The complete vent must maintain the manufacturer-specified clearance from combustible materials. Insulation, framing, wiring and stored materials must not enter or block the required clearance space.

The vent route should rise as required and avoid unnecessary horizontal sections and directional changes. Appropriate supports help prevent movement, separation and excessive stress on the appliance connection.

Inspection and Maintenance

Have the complete venting system inspected periodically for corrosion, loose connections, physical damage and improper clearance. The exterior termination must remain free from nests, leaves, snow and other obstructions.

Possible warning signs include corrosion, condensation, soot, unusual odors or repeated appliance shutdowns. Stop using the equipment and contact a qualified professional if a venting problem or unsafe condition is suspected.

Install and maintain carbon monoxide alarms according to applicable codes and the alarm manufacturer’s instructions. Carbon monoxide alarms provide important protection but do not replace proper vent installation and professional inspection.

Product Features

• Manufacturer: DuraVent
• Model: 4BV24
• Product type: Type B gas vent pipe
• Nominal inside diameter: 4 inches
• Pipe length: 24 inches
• Durable double-wall construction
• Aluminum inner vent wall
• Galvanized steel exterior
• Compatible with approved 4-inch DuraVent Type B components
• Professional installation required

Product and Installation Resources

Browse additional Type B vent pipe and installation supplies from Xpress Supply. Review the official DuraVent Type B Gas Vent information before installation.

Choose the 4BV24 when a properly designed system requires a 4-inch by 24-inch DuraVent Type B gas vent section. Confirm appliance compatibility, vent sizing, system components and local requirements before ordering.