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

Product ID: 275870747

Details

Brand
HLZC
Colour
Blue
Finish type
Brushed
Material
Silicone
Product dimensions
45W x 115H

🌀Flexible, durable silicone build

🔧Fits 1.5"–1.75" pipes

🛡️Automatic odor & backflow blocker

140 zł

Duties & taxes included

In stock

Sold byAmazon PolandDelivered 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 Poland.

Secure transaction

Description

🚿 Seal out the stink, let freshness flow!

ODOR BACKFLOW DEFENSE - Smart one-way valve design blocks sewer gases and prevents unpleasant backflow, keeping your space fresh.
PLUG PLAY INSTALLATION - No tools required—just insert and trim if needed for a seamless, quick setup.
VERSATILE MULTI ROOM USE - Ideal for toilets, kitchens, basements, and laundry drains—upgrade your entire home’s air quality.
UNIVERSAL FIT ZERO HASSLE - Adjustable rings ensure perfect seal for standard 1.5" to 1.75" pipes—no guesswork needed.
PREMIUM SILICONE DURABILITY - Eco-friendly, stretchable silicone resists deformation and lasts through daily wear and tear.

This adjustable silicone drain backflow preventer fits standard 1.5" to 1.75" pipes with included rings for a secure fit. Its automatic one-way valve blocks sewer odors and backflow while allowing smooth drainage. Made from durable, eco-friendly silicone, it’s easy to install without tools and perfect for bathrooms, kitchens, basements, and laundry areas—ensuring a fresher, cleaner home environment.

Specifications

ASIN	B0895NFGCN
ASIN	B0895NFGCN
Additional Features	Adjustable
Best Sellers Rank	#38,714 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #223 in Kitchen Drains & Strainers
Brand Name	HLZC
Color	Blue
Customer Reviews	3.9 3.9 out of 5 stars (550)
Customer reviews	3.9 3.9 out of 5 stars (550)
Date First Available	9 July 2020
Finish Types	Brushed
Global Trade Identification Number	06221243457657
Item Dimensions W x H	45W x 115H millimeters
Item Weight	200 Grams
Item model number	4
Manufacturer	HLZC
Manufacturer	HLZC
Manufacturer Part Number	4
Material Type	Silicone
Model Number	4
Number of Items	4
Product Dimensions	4.5 x 4.5 x 11.48 cm; 200 g
Product Style	Modern

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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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TrustScore 4.5 | 7,300+ reviews

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Great experience from order to delivery. Highly recommended!

1 week ago

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2 days ago

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140 zł

Duties & taxes included

In stock

Sold byAmazon PolandDelivered 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 Poland.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Yusuf A.

Fantastic experience overall. Will recommend to friends and family.

1 month ago

Pooja R.

The customer service exceeded my expectations. Perfect for buying products you can't find elsewhere.

1 week ago

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