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)

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" to 1.75" pipes

🛡️Automatic odor & backflow shut-off

251 DH

Duties & taxes included

In stock

Sold byAmazon MoroccoDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🚫💨 Say goodbye to stink and backflow—upgrade your drain game now!

ECO FRIENDLY DURABILITY - Premium silicone resists deformation and lasts, combining sustainability with strength.
EFFORTLESS INSTALLATION - Simply insert and trim if needed—no tools, no plumber, no downtime.
VERSATILE HOME ESSENTIAL - Perfect for toilets, kitchens, basements, and laundry drains—your all-in-one defense against backflow.
UNIVERSAL FIT ZERO HASSLE - Adjustable rings ensure perfect seal for standard pipe sizes, no guesswork needed.
ODOR BLOCKER EXTRAORDINAIRE - Automatic one-way valve stops sewer gases dead in their tracks—breathe fresh, live fresh.

The HLZC Drain Backflow Preventer is an adjustable silicone one-way valve designed to fit standard 1.5" to 1.75" pipes. It features an automatic shut-off mechanism that blocks sewer gas odors and prevents backflow, ensuring fresh air in your home. Made from durable, eco-friendly silicone, it’s easy to install without tools and fits multiple drain types including toilets, kitchens, and laundry areas.

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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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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