PVC Backdraft Damper Check Valve 80–150mm | One-Way Draft Blocker
PVC Backdraft Damper Check Valve 80–150mm | One-Way Draft Blocker
PVC Round Backdraft Damper & One-Way Check Valve (80–150mm)
Keep your home's air flowing in the right direction with this heavy-duty PVC Round Backdraft Damper. Designed for bathroom and kitchen ventilation fans, this one-way check valve prevents reverse airflow, stops unwanted drafts from entering your living space, and acts as a barrier against insects and mosquitoes sneaking in through your air duct. Made in Mainland China.
Key Features
- One-Way Airflow Control: Allows air to exit freely while blocking reverse flow and backdrafts from outside.
- Insect & Mosquito Barrier: The flap seal prevents pests from entering through ventilation ducts when the fan is not running.
- Multiple Size Options: Available in 80mm, 100mm, 110mm, 125mm, and 150mm to fit a wide range of standard PVC round ducts.
- Durable PVC Construction: Lightweight yet sturdy material that resists moisture, making it ideal for bathroom and kitchen environments.
- Easy Drop-In Installation: Simply insert into your existing round duct pipe — no special tools required.
- Versatile Application: Compatible with bathroom exhaust fans, kitchen range hood ducts, HVAC vents, and general household ventilation systems.
Specifications
| Material | PVC |
| Available Sizes | 80mm / 100mm / 110mm / 125mm / 150mm |
| Type | One-Way Backdraft Damper / Check Valve |
| Application | Bathroom & Kitchen Ventilation Fans, Air Ducts |
| Country of Origin | Made in Mainland China |
What's in the Box
- 1 × PVC Air Duct Check Valve (Backdraft Damper)
Note: Please allow 0–1 cm tolerance due to manual measurement. Colors may vary slightly between monitors and actual product.
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Frequently Asked Questions
Q: What sizes does this PVC backdraft damper check valve come in?
A: This one-way PVC check valve is available in five standard sizes: 80mm, 100mm, 110mm, 125mm, and 150mm. Be sure to measure your existing round duct pipe diameter before ordering to ensure the correct fit.
Q: How does a backdraft damper check valve work?
A: A backdraft damper uses a lightweight flap mechanism that opens when your ventilation fan is running, allowing air to flow outward. When the fan is off, the flap closes under its own weight, preventing outside air, drafts, and insects from entering back through the duct — keeping your indoor environment clean and comfortable.
Q: Is this check valve suitable for both bathroom and kitchen ventilation fans?
A: Yes! This PVC round backdraft damper is designed for use with standard bathroom exhaust fans and kitchen range hood ventilation ducts. Its moisture-resistant PVC material makes it durable in high-humidity environments like bathrooms and kitchens.
Q: Is installation difficult?
A: Not at all. This damper is designed for straightforward drop-in installation into a standard round PVC duct pipe. No special tools are required — simply select the correct size and insert it into your existing ventilation duct.