I have a compact 5" diameter cool tube which I need to connect to 4" ducting. The only 5" to 4" reducers I can find are these, but don't I need ones that are crimped on the 5" end? Or do they just slide onto the cooltube with a tight fit?
I'd really like to avoid having to use duct tape near the cool tube...
I'd really like to avoid having to use duct tape near the cool tube...