
















🔄 Connect with Confidence — The Ultimate 4" Vent Duct Solution
The Vent Systems 100 mm (4") Air Vent Duct Connector Flange is a robust ABS plastic component designed for easy, secure connection of round HVAC pipes. Perfect for both DIY enthusiasts and professionals, it features a 3.93" outer diameter, pre-drilled mounting holes, and supports a wide temperature range, making it an essential upgrade for efficient heating, cooling, and ventilation systems.







| ASIN | B08GWS5G1H |
| Assembled Diameter | 3.93 Inches |
| Batteries Required? | No |
| Batteries included? | No |
| Best Sellers Rank | 23,936 in DIY & Tools ( See Top 100 in DIY & Tools ) 76 in Ducting |
| Colour | White |
| Customer Reviews | 4.4 4.4 out of 5 stars (1,056) |
| Cutting Diameter | 3.93 Inches |
| Date First Available | 28 Aug. 2020 |
| Installation method | Wall Mounted |
| Item Package Quantity | 1 |
| Item Weight | 70 g |
| Item model number | 4751037230019 |
| Manufacturer | Vent Systems |
| Material | Plastic |
| Number of Pieces | 1 |
| Part Number | 4751037230019 |
| Shape | Square |
| Size | 4 pouces |
T**W
Worked Well and Did the Job
The 6" Inch Air Vent Duct Connector Flange worked well for what I used it for. It fitted properly, was easy to install, and connected the ducting securely. Nothing complicated, but it does exactly what it’s meant to do. Good quality and no issues during fitting. Overall, a straightforward, reliable part that does the job as expected.
A**R
Very good
Come very quickly good quality
K**J
Happy
Accurate size (not always the case with vent and ducting products). Is a little noisy but I’ve sorted that with a thin line of silicone where the flap contacts the body
R**T
Good fit
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.
C**U
Works well enough inline with an air conditioner exhaust, but noisy in the wind
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.
A**N
Cool
Cool
K**E
Good
Did the job
C**T
Fits perfectly.
Great product - perfect fit.
S**O
very well
M**S
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.
M**Z
Cumple con lo que se espera solo deberían hacer más rígido el material ya que al instalarlo casi se quebra con la fuerza de los tornillos, el plástico que tiene en medio que se mueve con el aire se lo quite ya que no lo veo necesario por contenerlo ya la campana.
A**R
You can exhaust through a wall chase for concealment
D**S
Passt absolut perfekt und funktioniert einwandfrei
Trustpilot
3 days ago
3 weeks ago