Selkirk 3"/4"/5" Double Wall Increaser (Round - Type B Gas Vent) Size:3" to 4" Model 7DT-09SS Series DuraTech DT

Model 7DT-09SS Series DuraTech DT (5"-8") Product Type Chimney Pipe Inner Finish

it is almost as efficient as a single wall black pipe

Tabletop design accommodates glasswear

starting with the standard match throw system for simplicity

Sizing Chart for Spacers 36" Heights QTY 42" Heights QTY S1 1/2" 1 S1 1/2" 1 S2 9/16" Ea

Selkirk 3"/4"/5" Double Wall Increaser (Round - Type B Gas Vent) Size:3" to 4" Model 7DT-09SS Series DuraTech DTSelkirk 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.