Pipe Check Valve | Air Duct Draft Blocker 80–200mm
Pipe Check Valve | Air Duct Draft Blocker 80–200mm
Pipe Check Valve – Air Duct Ventilation Draft Blocker
Keep your ventilation system working efficiently with this durable plastic Pipe Check Valve. Designed to allow airflow in one direction only, it prevents backdrafts, unwanted odors, and cold air from traveling back through your ductwork. Ideal for bathroom fans, kitchen exhausts, HVAC ducts, and other round ventilation pipes.
Key Features
- One-Way Airflow Control: Gate-style flap opens with positive airflow and closes automatically when airflow stops, blocking reverse drafts effectively.
- Multiple Size Options: Available in 80mm, 100mm, 110mm, 150mm, and 200mm diameters to fit a wide range of standard ventilation pipes.
- Durable Plastic Construction: Made from high-quality, lightweight plastic that resists moisture and everyday wear for long-lasting performance.
- Round Shape & Gate Structure: Smooth round profile ensures a secure, flush fit inside standard circular air ducts with minimal airflow restriction.
- Easy Installation: Simple push-in or snap-fit design — no special tools required. Portable and easy to remove or reposition as needed.
- Versatile Application: Suitable for bathroom extractor fans, kitchen range hoods, dryer vents, HRV/ERV systems, and general HVAC ductwork.
Specifications
| Material | Plastic |
| Shape | Round |
| Structure | Gate |
| Available Sizes | 80mm / 100mm / 110mm / 150mm / 200mm |
| Color | As shown in product images |
| Country of Origin | Made in China |
What's in the Box?
- 1 × Pipe Check Valve (size as selected)
Note: Due to varying monitor settings and lighting conditions, the actual color may differ slightly from images. Please allow ±1–2 cm measurement tolerance due to manual measuring.
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Frequently Asked Questions
Q: What sizes does this pipe check valve come in?
A: This air duct check valve is available in five standard diameters: 80mm, 100mm, 110mm, 150mm, and 200mm, making it compatible with most common residential and commercial ventilation duct sizes.
Q: How does the pipe check valve work?
A: The check valve uses a gate-style flap mechanism. When your fan or ventilation system is running, the airflow pushes the flap open to allow air out. When the system stops, the flap falls closed under its own weight, preventing backdrafts, cold air ingress, and odors from returning through the duct.
Q: Is this check valve suitable for outdoor use or damp environments?
A: Yes. The plastic construction is moisture-resistant, making it suitable for use in humid environments such as bathrooms, kitchens, and utility rooms where condensation may be present in the ductwork.
Q: How do I install the pipe check valve?
A: Installation is straightforward — simply insert the check valve into your existing round duct pipe. It is designed for a secure push-in or snap fit with no special tools required. Ensure you select the correct diameter to match your duct pipe for a proper seal.
Production & Packaging Notice
To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.