Vent Systems 6" inch Pack of 2 Air Vent Duct Connector Flange - Straight Ventilation Pipe Plastic Ducting Connector Plate for Cooling Heating Ventilation System HVAC

Great exhaust vent! I have this installed into my ceiling to vent my grow tent. I like that the flap will close if I shut my exhaust fan off or the power goes off. Nothing can fall back into my 6” hose and into my exhaust fan. Well made and reliable.

Had a sloppy connection from my gas dryer to the wall outlet vent, This solved the problem of any leaks. Highly recommend!!

Passt absolut perfekt und funktioniert einwandfrei

I used these to provide a connection for my airbrush paint booth flexible extractor hoses. They are a standard 100mm and will take the aforementioned airbrush extractor pipes as well as standard tumble dryer hose. They work well.

This simple non-return air vent does it's job reasonably well. When it arrived I saw it would be very noisy and clatter a lot in the wind. I modified it by making an adjustable weight arm that holds it shut better than it otherwise would. I've also put a little bit of lithium grease around the inner join to help stop it bouncing when closeing under gravity. Even with these modifications, I still hear it opening and slamming shut on blustery days. It's a lot less annoying after modification than it could have been mind! It's not exactly obvious which way around it's supposed to work. Would be nice to include a simple arrow showing which way to fit it. Not too tricky to work out by experiment of course.