









🛠️ Upgrade your airflow game with the RKKI Check Valve — breathe smarter, live better!
The RKKI Check Valve is a 100 mm inline non-return valve designed for sheet metal and aluminum tubes, featuring smooth-running plastic flaps that automatically open and close to prevent backdrafts. Compatible with 230V exhaust fans and various HVAC systems, it offers easy push-fit installation, weatherproof durability, and is backed by over 40 years of ventilation expertise.





| Brand | calimaero |
| Color | White |
| Electric fan design | Exhaust Fan |
| Power Source | Electric |
| Style | Industrial |
| Product Dimensions | 3.74"D x 3.74"W x 0.28"H |
| Room Type | Bathroom |
| Special Feature | Smooth-Running Flaps for Small Fan Opening |
| Recommended Uses For Product | Applicable in all supply and exhaust air systems |
| Finish Type | Painted |
| Blade Length | 100 Millimeters |
| Theme | Modern |
| Speed | 1 RPM |
| Voltage | 230 Volts |
| Switch Type | On/Off |
| Item Weight | 0.02 Kilograms |
| Indoor/Outdoor Usage | Indoor |
| Model Name | Backdraft Shutter Inline RKKI 4 Inch |
| Control Method | Touch |
| Blade Material | Plastic |
| Is Cordless? | Yes |
| Number of Power Levels | 1 |
| Main Power Connector Type | Standard Household Plug (e.g., Type A, Type B) |
| Manufacturer | calimaero |
| Size | 100 mm |
| Form Factor | Inline |
| Part Number | RKKI-4 |
| Item Weight | 0.704 ounces |
| Item model number | RKKI 100 |
| Is Discontinued By Manufacturer | No |
| Finish | Painted |
| Item Package Quantity | 1 |
| Number Of Pieces | 1 |
| Special Features | Smooth-Running Flaps for Small Fan Opening |
| Batteries Included? | No |
| Batteries Required? | No |
F**.
Nice ítem
Work great on my project
C**S
Small and efficient
The diameter was slightly smaller than the bathroom extractor (both 100mm), so I adjusted it with many turns of sealing duct tape and it worked fine
D**E
Just ok
Served its purpose however has to be installed horizontally or springs will not keep damper doors closed
D**D
good -- just make sure you tape / seal it well!
it works for me, just make sure you tape it well! it's very delicate and technically not air-tight, but for the price, it's fine. I taped mine with aluminum tape and it worked just fine!
D**N
Waste of money!!!
The check valve flopped around inside the duct work and would have to secured with something such as glue. The springs are super weak and barely close the valve when the hinge pin is vertical if its horizontal forget it the top flap will stay open. Tried to glue mine in place and made a mess so in the trash it went!
H**Y
It's not the right size.
It does it job after u modify it.
Trustpilot
5 days ago
1 month ago