Would this be effective for a vent Backdraft. Would it flap and be noisy with air pushed through it?

I think this should not be effective for a vent Backdraft. Of course you can also try it.

Does this fit standard US sink drains and showers ?

Hello, you need to measure the opening of your drains. This fits 1 1/2" to 1 3/4" drain opening.

Will this stop water backflow?

The bottom of this floor drain is closed, which can stop water backflow

How much air pressure does it take to activate airflow for waterless checkvalve vent?

It needs normal or mild air pressure.

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

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Drain Backflow Preventer, One Way Valve, Adjustable Silicone Sink Floor Drain Trap for Pipes Tubes in Toilet Bathroom Kitchen (Blue-4)

Drain Backflow Preventer, One Way Valve, Adjustable Silicone Sink Floor Drain Trap for Pipes Tubes in Toilet Bathroom Kitchen (Blue-4)

Product ID: 214387923

Details

Brand
HLZC
Color
Blue
Finish Type
Brushed
Material
Silicone
Product Dimensions
1.77"W x

🌿Durable eco-friendly silicone

🔧Fits 1.5"–1.75" pipes

🛡️Blocks sewer backflow & odors

R$218

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.

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Description

🚿 Seal the deal on freshness—ditch the stink, keep the flow!

VERSATILE FRESHNESS - Perfect for toilets, kitchens, basements, and laundry areas to keep your space smelling clean and inviting.
TOOL FREE INSTALLATION - Simply insert into your drain pipe—no complex setup or mechanical parts to fail over time.
ECO FRIENDLY DURABILITY - Made from premium silicone that’s flexible, stretchable, and built to last without deformation.
UNIVERSAL FIT ZERO HASSLE - Adjustable design with dual fixed rings fits standard pipe sizes effortlessly.
ODOR BLOCKER EXTRAORDINAIRE - Automatic shut-off valve seals out unpleasant sewer smells for a fresher home vibe.

The HLZC Drain Backflow Preventer is an adjustable silicone one-way valve designed to fit 1.5" to 1.75" pipes. It prevents sewer gas backflow and odors with an automatic shut-off mechanism, made from durable, eco-friendly silicone. Easy to install without tools, it’s ideal for bathrooms, kitchens, basements, and laundry drains, ensuring a fresh, odor-free environment.

Specifications

ASIN	B0895NFGCN
Additional Features	Adjustable
Best Sellers Rank	#78,578 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #318 in Kitchen Drains & Strainers
Brand Name	HLZC
Color	Blue
Compatible Groove Diameter	4 centimeters
Customer Reviews	4.0 4.0 out of 5 stars (765)
Finish Types	Brushed
Global Trade Identification Number	06221243457657
Included Components	NO
Item Dimensions W x H	1.77"W x 4.52"H
Item Weight	200 g
Manufacturer	HLZC
Manufacturer Part Number	4
Material Type	Silicone
Model Number	4
Number of Items	10
Product Style	Modern
Unit Count	4 Count

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Yes, all products are sourced directly from authorized retailers in the US, UK, UAE and India. We maintain strict quality control processes and verify each product before shipping. All items come with applicable manufacturer warranties and are covered by our standard return policy.

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How is product pricing calculated?+

Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

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R$218

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

Rajesh P.

Customer service was outstanding when I had questions about the product.

2 days ago

Sneha T.

Received my product in pristine condition. Great service overall.

1 month ago

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