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: 242079799

Details

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

🌿Eco-friendly durable silicone

🔧Fits 1.5"–1.75" pipes

🛡️Backflow & odor blocker

KSh8607

Duties & taxes included

In stock

Sold byAmazon KenyaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🚿 Seal out the stink, let freshness flow!

TRIM TO FIT DESIGN - Easily customize length by trimming the silicone base for faster drainage and a flawless fit.
BUILT TO BEND NOT BREAK - Premium silicone construction offers unmatched flexibility and durability—no deformation, no leaks.
UNIVERSAL FIT ZERO HASSLE - Adjustable rings ensure perfect seal for 1.5" to 1.75" pipes—no guesswork, just plug & play.
ODOR BLOCKED FRESHNESS UNLOCKED - Automatic shut-off valve stops sewer gases dead in their tracks, keeping your space smelling pristine.
VERSATILE INSTALLATION INSTANT UPGRADE - Ideal for toilets, kitchens, basements, and laundry drains—upgrade your home’s hygiene in minutes.

The HLZC Adjustable Silicone Drain Backflow Preventer is a versatile, eco-friendly plumbing solution designed to fit standard 1.5" to 1.75" pipes. Featuring a smart automatic shut-off valve, it effectively blocks sewer backflow and odors while allowing smooth drainage. Made from durable, flexible silicone with adjustable rings and a trim-to-fit base, it installs easily in bathrooms, kitchens, basements, and laundry areas to maintain a fresh, odor-free environment.

Specifications

ASIN	B0895NFGCN
Best Sellers Rank	227,233 in DIY & Tools ( See Top 100 in DIY & Tools ) 673 in Bathroom Sink Taps
Brand Name	HLZC
Colour	Blue
Compatible Groove Diameter	4 Centimeters
Customer Reviews	4.0 4.0 out of 5 stars (740)
Finish Type	Brushed
Global Trade Identification Number	06221243457657
Included Components	NO
Item Dimensions W x H	45W x 115H millimetres
Item Weight	200 Grams
Manufacturer	HLZC
Manufacturer Part Number	4
Material Type	Silicone
Model Number	4
Number of Items	10
Number of Packs	4
Product Style	Modern
Special Features	Adjustable
Unit Count	4.0 count

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