Selkirk 2003622 Model R Type B Gas Vent 10 Inches to 18 Inches Increaser

Product Description

The Selkirk 2003622 is a Model R Type B Gas Vent Increaser designed to step up vent pipe diameter from 10 inches to 18 inches. HVAC installers and gas appliance technicians use this fitting when a venting system requires a larger outlet size to match a flue, chimney liner, or downstream vent connector. The increaser allows a maximum increase of 4 vent sizes, giving installers the flexibility to transition between significantly different pipe diameters without fabricating custom fittings or using multiple adapters. This kind of transition fitting is essential in residential and light commercial gas venting systems where boilers, furnaces, water heaters, and other Category I gas appliances need to exhaust combustion gases safely and efficiently. The Selkirk Model R series is a Large Diameter Type B Gas Vent system built to meet the demands of professional installation. Type B double-wall gas vent pipe and fittings are rated for natural gas and propane appliances and are listed to UL 441 standards, making them a trusted choice for code-compliant venting installations. The lightweight construction of the Model R line reduces labor effort on the job, especially in tight mechanical rooms or attic spaces where maneuverability matters. The snap-lock or twist-lock connection style common to Model R fittings provides a secure, reliable joint that holds without additional fasteners. This increaser fits into the broader Model R system, which is engineered for consistent component compatibility across the full range of pipe sizes. Whether you are replacing a damaged increaser or building out a new venting run, the 2003622 delivers a straightforward, code-ready solution for diameter transitions in Type B gas vent applications.

• Increases vent pipe diameter from 10 inches to 18 inches for Type B gas vent systems
• Compatible with Selkirk Model R Large Diameter Type B Gas Vent series components
• Lightweight construction designed for easy handling and installation in confined spaces

Product Highlights

The Selkirk 2003622 increaser provides a reliable, code-compliant transition from 10 inches to 18 inches within the Model R Type B Gas Vent system. It is built for professional HVAC and gas appliance installers who need a secure, lightweight fitting for large-diameter venting applications.

Product Information

Standard Information

• Brand: SELKIRK
• Manufacturer Part Number: 2003622

Technical Specifications

• Product Type: Type B Gas Vent Increaser
• Series: Model R Large Diameter
• Inlet Size: 10 inches
• Outlet Size: 18 inches
• Maximum Size Increase: 4 sizes
• Vent Standard: Type B Gas Vent