Selkirk 3"/4"/5" Double Wall Increaser (Round - Type B Gas Vent) Size:5" to 6" to create an airy twist

to create an airy twist at the center

Removes white deposits on gas appliance glass surfaces

Burner with expanded Ember Bed

⮞ What kind of fuel should I use

Selkirk 3"/4"/5" Double Wall Increaser (Round - Type B Gas Vent) Size:5" to 6" to create an airy twistSelkirk 3" 4" 5" Double Wall Increaser (Model RV Type B Gas Vent) Used to increase pipe diameter. (RV) Round Type B Gas Vent Model RV Double Wall Gas Vent is the installer's choice for residential, industrial and light commercial applications. The aluminum liner heats up quickly to promote strong draft. Galvanized outer provides protection against outdoor elements. Product line includes DWC Double Wall Connectors and EFC Expandable Flex Connectors.