LAMBRO 289W 4 Dryer Vent Seal(R) consumer electronics

so today I'm looking to replace the dryer vent on my house I have one of the regular style dry events that just blows out and I get a lot of cold air or a backdraft back in through the dryer so I'm gonna install I picked up one of these ones that is supposed to seal it closes it's got the valve inside which is supposed to go up and down and it's supposed to be supposed to be much warmer so my first step is gonna be a hat to remove the old vent and then we'll look to install the new one right step number one was to take my old bent out it's basically held in by four screws and then it was some silicone it wasn't a big deal to get out but mine's in kind of a tough spot because it's behind my central a unit next step is gonna be I'm going to take this off cuz we're gonna reuse this pipe on the new one alright now I need to just slide the new vent in and then I'm going to screw it to the wa