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

🌿Durable eco-friendly silicone

🔧Fits 1.5"–1.75" pipes

🛡️Automatic odor & backflow block

1032984₫

Duties & taxes included

In stock

Sold byAmazon VietnamDelivered 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 Vietnam.

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Description

🚿 Seal out the stink, let freshness flow!

VERSATILE APPLICATION - Ideal for toilets, kitchens, bathrooms, basements, and laundry drains—upgrade your entire home’s drainage system.
ECO FRIENDLY DURABILITY - Made from premium, stretchable silicone that resists deformation and lasts through daily wear and tear.
ODOR BACKFLOW DEFENSE - Smart one-way valve design blocks sewer gases and prevents backflow, keeping your space fresh and hygienic.
PLUG PLAY INSTALLATION - No tools needed—just insert and trim if necessary for a seamless, quick setup that anyone can handle.
UNIVERSAL FIT ZERO HASSLE - Adjustable rings ensure perfect seal for standard pipes from 1.5" to 1.75", eliminating guesswork.

The HLZC Drain Backflow Preventer is a modern, adjustable silicone valve designed to fit standard 1.5" to 1.75" pipes. It features a one-way automatic shut-off mechanism that blocks unpleasant odors and sewer backflow while allowing smooth drainage. Crafted from durable, eco-friendly silicone, it offers easy plug-and-play installation with included adapter rings for a secure fit across various household drains including bathrooms, kitchens, and basements.

Specifications

ASIN	B0895NFGCN
ASIN	B0895NFGCN
Additional Features	Adjustable
Best Sellers Rank	#32,831 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #197 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

Anjali K.

The product quality is outstanding. Exactly what I needed for my work.

1 month ago

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

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1032984₫

Duties & taxes included

In stock

Sold byAmazon VietnamDelivered 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 Vietnam.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Ayesha M.

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

5 days ago

Anita G.

Good experience, but the tracking updates could be better.

2 months ago

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