No need for clamps or connectors—duct and fittings have a male end that is slightly smaller than its female end for simple assembly.

Fittings have gaskets which create a tight seal—you don't need to seal joints with coating or tape.

For use with gas-fired equipment, such as boilers and furnaces, these vent pipes and fittings withstand temperatures up to 400° F. Also known as type B gas vents.