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.

Drain Backflow Preventer One Way Valve Adjustable Silicone Sink Floor

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

Help Track order

Account Cart

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

Help Track order

Account Cart

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
Additional Features	Adjustable
Best Sellers Rank	#47,268 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #264 in Kitchen Drains & Strainers
Brand	HLZC
Brand Name	HLZC
Color	Blue
Colour	Blue
Compatible Groove Diameter	1.5 Inches
Customer Reviews	3.9 out of 5 stars 552 Reviews
Finish Types	Brushed
Finish type	Brushed
Global Trade Identification Number	06221243457657
Item Dimensions W x H	45W x 115H millimeters
Item Weight	200 Grams
Manufacturer	HLZC
Manufacturer Part Number	4
Material	Silicone
Material Type	Silicone
Model Number	4
Number of Items	4
Product Style	Modern
Product dimensions	45W x 115H millimeters
Special features	Adjustable

Reviews

J**A

Unsatisfied Product

Product is not suitable in my drainage

1.05.2025

E**.

Es muy fácil de instalar y hasta ahora cumple muy bien su función

Se instala muy rápido

3.11.2022

A**M

حلوة

ممتازة كجودة

12.10.2025

S**H

HLZC Floor Drain Backflow Preventer, Silicone

Fits a standard 2 inch pipe like a shower floor drain it looks like it will work. I am giving this five stars because of how cheap the price is but expect a seven dollar product.

18.07.2026

K**E

Gute und wirksame Lösung für Rückstau

War die einzige wirklich gute Lösung für einen Duschwannenabfluss, bei dem es gelegentlich Rückstau durch gleichzeites Leeren der badewanne gab.

10.03.2025

F**N

bon

C'était un produit pour mon frère. Idéal pour lui. Ça fait le travail pour l'urinoir de son commerce. Depuis plusieurs mois qu'il a installé ce produit. Il aime. Plus d'odeur désagréable. La quantité était un peu énorme.

12.10.2025

Common Questions

Are the products genuine and authentic?+

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.

How long does delivery take and is it reliable?+

Delivery times vary by destination country, typically ranging from 3-9 business days. Each order is fully trackable through our system. We handle all customs clearance and use reliable courier partners for last-mile delivery. You'll receive regular updates about your order status via email and our app.

What is Desertcart? Is it safe to order from?+

Desertcart is an international e-commerce platform operating since 2014. We securely process thousands of orders globally each day. Every product goes through our quality verification process before delivery, and we provide end-to-end order tracking, 24/7 customer support, and a comprehensive returns policy to ensure a safe shopping experience.

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.

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Neha S.

Excellent communication throughout the order process. Product is perfect.

2 weeks ago

Yusuf A.

Fantastic experience overall. Will recommend to friends and family.

1 month ago

View all Trustpilot reviews

HK$184

Duties & taxes included

In stock

Sold byAmazon Hong KongDelivered 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 Hong Kong.

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

Reema J.

Perfect platform for hard-to-find items. Delivery was prompt.