Can this be used to stop my Hot water tank from blowing out the flame on windy days?

sorry, I did not use it for the flame from HWT.

can this be used on a dryer vent or will the foam seal melt?

I would say the dryer heat could damage or maybe even melt the seal. Maybe you could try removing the gasket and wrap a strip of fiberglass in it’s place.

Would this help keep out bugs?

Yes it creates a barrier and only opens one way from the inside of house

Would this fit between two sections of standard, 4 inch semi-rigid ducting? Looking to add to bathroom vent fan ductwork.

Yes, that's exactly how you would use it. Make sure to buy the correct HVAC aluminum (metallic) duct tape for the connection. A clamp cannot be used bc the crushing pressure would inhibit the flapper from working properly.

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Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

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8 Inch Draft Blocker Backdraft Damper Duct Draft Stopper One-Way Airflow Ducting Insert Backflow Preventer Inline Fan Vent Deflector

Product ID: 361399988

🔄One-way airflow backdraft prevention

⚙️Spring-loaded flap for optimal sealing

🛠️8-inch galvanized steel build

R$404

Duties & taxes included

In stock

Sold byAmazon BrazilDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

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Description

🚫💨 Stop drafts, save energy, and breathe smarter!

TRUSTED TOP RANKED - Rated 4.6 stars by over 1,300 users and ranked top 10 in HVAC ducting essentials.
EFFORTLESS INSTALLATION - Push-in design fits snugly into ventilation pipes with precise spring positioning for flawless operation.
VERSATILE COMPATIBILITY - Perfect for ACs, exhaust fans, range hoods, and heating ducts across residential and commercial spaces.
INDUSTRIAL GRADE DURABILITY - Crafted from galvanized steel and aluminum for long-lasting performance and corrosion resistance.
ENERGY SMART AIRFLOW CONTROL - Prevents unwanted backflow, enhancing HVAC efficiency and maintaining indoor air quality.

The 8 Inch Draft Blocker Backdraft Damper is a robust ventilation accessory made from galvanized steel and aluminum, designed to prevent air backflow in HVAC systems. Its spring-loaded flap ensures one-way airflow, improving energy efficiency and indoor air quality. Easy to install and widely compatible with various duct types, it’s a top-rated choice for both residential and commercial ventilation needs.

Specifications

ASIN	B099JXNM75
Best Sellers Rank	#9,181 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #15 in HVAC Ducting
Brand	Kikerike
Brand Name	Kikerike
Color	Silver
Customer Reviews	4.5 out of 5 stars 1,375 Reviews
Manufacturer	Kikerike
Material	Metal
Material Type	Metal
Unit Count	1 Count

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Trustpilot

TrustScore 4.5 | 7,300+ reviews

Anita G.

Good experience, but the tracking updates could be better.

2 months ago

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The product exactly matches the description. Very satisfied with my purchase.

5 days ago

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R$404

Duties & taxes included

In stock

Sold byAmazon BrazilDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Brazil.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Neha S.

Excellent communication throughout the order process. Product is perfect.

2 weeks ago

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Very reliable shop with genuine products. Will definitely buy again!

2 weeks ago

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