Selkirk 103305 Gas Vent Type B 3 Inches X 5 Inches Increaser

Product Description

The Selkirk 103305 is a Type B gas vent increaser designed to transition from a 3-inch diameter vent pipe to a 5-inch diameter vent pipe. This fitting is a standard component in residential and light commercial gas venting systems. HVAC technicians and plumbers rely on Type B double-wall vent fittings to safely exhaust combustion gases from natural gas and propane appliances such as furnaces, water heaters, boilers, and space heaters. The increaser allows installers to step up vent pipe diameter when connecting appliances with different outlet sizes or when code requires a larger diameter run for longer vent runs. The double-wall construction of the Selkirk 103305 creates an insulating air gap between the inner and outer walls. This design helps maintain flue gas temperature, reducing the risk of condensation inside the vent and improving draft performance. Consistent draft is critical to appliance efficiency and safe venting of carbon monoxide and other combustion byproducts. The non-positional locking system on the Selkirk 103305 allows the fitting to be secured at any rotational angle, giving installers flexibility in tight mechanical rooms or attic spaces. No tools are required to disassemble the fitting, which saves time during service calls and inspections. This increaser is compatible with Type B vent systems from all major brands, making it a versatile choice for replacement and new installation work. The fitting ships as a single unit and carries a lifetime manufacturer warranty. TAA and BAA compliance makes it suitable for qualifying government and institutional projects. HVAC contractors, mechanical contractors, and plumbing professionals will find the Selkirk 103305 to be a straightforward, reliable solution for gas vent diameter transitions.

• Double-wall construction maintains flue gas temperature and reduces condensation risk
• Non-positional locking system secures at any angle with no tools required for disassembly
• Compatible with Type B gas vent systems from all major brands

Product Highlights

The Selkirk 103305 Type B gas vent increaser transitions 3-inch vent pipe to 5-inch diameter with double-wall construction and a tool-free locking system. It carries a lifetime warranty and is compatible with all major Type B vent brands.

Product Information

Standard Information

• Brand: SELKIRK
• Manufacturer Part Number: 103305

Technical Specifications

• Product Type: Type B Gas Vent Increaser
• Inlet Diameter: 3 inches
• Outlet Diameter: 5 inches
• Wall Construction: Double Wall
• Package Quantity: 1
• Warranty: Lifetime
• TAA/BAA Compliant: Yes