PVC Exhaust Fan Check Valve – Backdraft Damper for Bathroom & Kitchen Ventilation

Keep your home's air fresh and odor-free with this durable PVC Exhaust Fan Check Valve. Designed as a round pipe backdraft damper, it automatically blocks reverse airflow through your ventilation duct — preventing kitchen odors, moisture, and stale air from creeping back into your living space. Compatible with both 75mm and 110mm PVC pipes as well as 80/100mm aluminum foil ducts, this versatile valve is the ideal upgrade for range hoods, bathroom exhaust fans, and kitchen ventilation systems.

Made in Mainland China.

Key Features

Anti-Backdraft Design: Normally open valve closes automatically when airflow reverses, blocking odors and contaminants from re-entering your space.
Electricity-Free Operation: Pneumatically actuated — no wiring, no power source required. Simply installs inline with your existing ductwork.
Durable PVC Construction: Lightweight yet sturdy PVC material handles normal temperatures and everyday ventilation demands with ease.
5 Flexible Installation Styles: Fits a wide range of duct configurations for maximum compatibility.
Universal Fit: Works with kitchen range hoods, bathroom exhaust fans, and general air duct ventilation grills.

5 Installation Styles

Style A: Double-ended — connects PVC pipe with outer diameter of 110mm
Style B: One end outer diameter 110mm PVC pipe; other end inner diameter 80mm or 100mm aluminum foil tube
Style C: Double-ended — connects PVC pipe with outer diameter of 75mm
Style D: One end outer diameter 75mm PVC pipe; other end inner diameter 80mm or 100mm aluminum foil tube
Style E: Double-ended — connects aluminum foil tube with inner diameter of 80/100mm

Specifications

Material	PVC
Compatible Pipe Sizes	75mm & 110mm OD PVC; 80mm & 100mm ID Aluminum Foil
Operation	Electricity-free / Pneumatic
Valve Type	Normally Open, Check/Backdraft Damper
Temperature Range	Normal Temperature
Country of Origin	Mainland China
Package Contents	1× Check Valve (No other accessories included)

Note: Actual product color may vary slightly from images due to monitor differences. Manual measurements may have a ±1–3cm tolerance.

Related Products You May Like

For guidance on home ventilation best practices and indoor air quality, visit the U.S. EPA Indoor Air Quality – Ventilation in Homes resource.

Frequently Asked Questions

Q: What pipe sizes is this PVC backdraft damper check valve compatible with?

A: This check valve is compatible with 75mm and 110mm outer diameter PVC pipes, as well as 80mm and 100mm inner diameter aluminum foil ducts. Five installation styles (A–E) cover a wide range of duct and pipe configurations, making it suitable for most standard kitchen and bathroom ventilation setups.

Q: Does this exhaust fan check valve require electricity to operate?

A: No — this backdraft damper is completely electricity-free. It operates pneumatically, meaning airflow from your exhaust fan opens the valve, and it closes automatically when airflow stops or reverses, preventing odors and outside air from flowing back into your home.

Q: Can I use this check valve for both kitchen range hoods and bathroom exhaust fans?

A: Yes! This round pipe check valve is designed for use with kitchen range hoods, bathroom exhaust fans, and general air duct ventilation systems. Its dual pipe-size compatibility (75mm and 110mm) makes it a versatile solution for most residential ventilation needs.

Q: Is installation difficult?

A: Installation is straightforward. The valve includes manual and instruction guidance. Simply select the installation style (A–E) that matches your existing duct configuration and connect accordingly — no special tools or electrical work required.

Made with care

Great value

Elegant design

Quality materials

This product is crafted with quality materials to ensure durability and performance. Designed with your convenience in mind, it seamlessly fits into your everyday life.

We strive to process and ship all orders in a timely manner, working diligently to ensure that your items are on their way to you as soon as possible.

We are committed to ensuring a positive shopping experience for all our customers. If for any reason you wish to return an item, we invite you to reach out to our team for assistance, and we will evaluate every return request with care and consideration.