4 x 7 inch
Browse 4 x 7 inch gas venting systems and related fittings and narrow your options by the specifications that matter. This diameter group organizes manufacturers and product lines by nominal size, helping you narrow a venting search before selecting an actual listed system.
Before ordering, compare exact nominal inside/outside size, manufacturer series, approved appliance, and connection type. For paired dimensions, confirm both the inner exhaust and outer combustion-air passages.
