Selkirk-Metalbest Metalbest RV 3" x 6" Type B Gas Vent Low Profile Double Wall Increaser

3" x 6" Type B Gas Vent Low Profile Double Wall Increaser from the RV CollectionThis gas vent increaser allows you to adapt 3" diameter pipe to 6" diameter pipe when required for your application.The RV series offers round gas vent pipe and fittings for residential, commercial and industrial applications. It features a snap together, non-positional lock system, die formed ends, and eliminates the need for all cutting, fitting and special engineering. It has an improved joint design provides for a rapid a...