Do you make your own holes in the exhaust part from the stove (that's part of the stove)? Screw right into it?
Mommyof4,
There are two ways to fasten that adapter to the stoves exhaust pipe with screws one is to use self taping screws and no pilot holes and the other is to drill a pilot hole and use sheet metal screws, these holes are made after you have the adapter on the exhaust pipe and sealed.
In both cases you need to be certain that you put the screws on the single pipe portion of the adapter nearest to stove and that you seal the adapter to the exhaust pipe by applying a coat of sealant between the adapter and the exhaust pipe before you install the screws ( imacman provided a picture of how that should look) , as well as dab of sealant where you are going to place a screw. There is supposed to be three equally spaced screws installed around the adapter.
The sealant provides a gas tight seal and the screws the mechanical fastening so the pipes can't pop apart or be inadvertently pulled apart.