Duravent 0506INC B-vent Increaser 5 X 6 Inches

Product Description

The DURAVENT 0506INC is a B-vent increaser fitting designed to transition vent pipe diameter from 5 inches to 6 inches within Type B gas vent systems. Built with double wall air-insulated construction, this fitting maintains the required clearance to combustibles established by NFPA 54 and appliance manufacturer specifications. It connects between standard B-vent sections and enables upsizing of the vent run where system design or appliance venting requirements call for a larger diameter. Licensed HVAC technicians and gas appliance installers are the primary users of this fitting during new installations and system modifications.

This increaser is used in residential and light commercial Category I gas appliance venting systems, including those serving natural gas and propane furnaces, water heaters, boilers, and other atmospherically vented appliances. It is installed inline between B-vent pipe sections where an increase in vent diameter is required, typically to meet appliance venting tables or to transition to a larger common vent in a multi-appliance system.

Key Features

• Transitions vent pipe from 5 inches to 6 inches in a single fitting
• Double wall air-insulated construction maintains required clearances to combustibles
• Designed for Category I atmospherically vented gas appliance systems
• Installs inline between standard B-vent pipe sections
• Supports proper draft and vent sizing per NFPA 54 venting tables

Compatibility

Designed as an OEM-style replacement or new-installation fitting for Type B double wall gas vent systems using 5-inch and 6-inch diameter B-vent pipe sections.

Installation Notes

Installation should be performed by a licensed HVAC technician or gas appliance installer in accordance with NFPA 54, the International Fuel Gas Code, and the appliance manufacturer's venting instructions. Shut off the gas supply and allow the appliance to cool completely before servicing or modifying any vent section. Ensure all joints are secured per the vent system manufacturer's assembly instructions and that proper clearances to combustibles are maintained throughout the vent run. Verify the completed vent system configuration against the applicable venting tables before returning the appliance to service.