Duravent 0318PI B-vent Round Rigid Pipe 3x18 in Double Wall

Product Description

The DURAVENT 0318PI is a double-wall round rigid B-vent pipe section designed for Category I gas appliance venting systems. Measuring 3 inches in diameter and 18 inches in length, this pipe section maintains flue gas temperature through its double-wall construction, which also helps meet required clearances to combustibles. It connects using a twist-lock mechanism for secure, field-efficient assembly. Licensed HVAC technicians and gas fitters install this component as part of a complete B-vent venting system on natural gas or propane appliances such as furnaces, water heaters, and boilers.

This pipe section is suited for residential and light commercial venting applications where Category I, fan-assisted or natural-draft gas appliances require a listed B-vent system. The 3-inch diameter fits smaller-capacity appliances and equipment with matching 3-inch vent collars. It is intended for interior vertical or offset venting runs where listed B-vent is the specified vent type per the appliance manufacturer and local mechanical codes.

Key Features

• Double-wall construction helps retain flue gas temperature and maintain proper draft
• 3-inch diameter x 18-inch length fits standard small-capacity Category I appliance vent collars
• Twist-lock connection system allows fast, secure field assembly without additional fasteners
• Round rigid pipe section integrates into complete B-vent system runs
• Designed to meet clearance-to-combustibles requirements associated with listed B-vent installations

Compatibility

Designed as an OEM-style replacement or new-installation component for listed B-vent systems serving Category I gas appliances with a 3-inch vent collar requirement.

Installation Notes

Installation of B-vent systems should be performed by a licensed HVAC technician or qualified gas fitter in accordance with NFPA 54, the appliance manufacturer instructions, and applicable local mechanical codes. Shut off gas supply and allow the appliance to cool completely before servicing any vent section. Do not mix B-vent components from different manufacturers within the same system unless listed for such use. Ensure all twist-lock joints are fully engaged and that the system maintains required clearances to combustibles throughout the run.

Technical Specifications

• Diameter: 3 inches
• Length: 18 inches
• Wall Construction: Double wall
• Pipe Shape: Round
• Pipe Type: Rigid
• Vent Category: Category I (B-Vent)
• Connection Type: Twist-lock

Standard Information

• Brand: DURAVENT
• Manufacturer Part Number: 0318PI