This is a type of check valve correct? The ability to take the lid off serves what purpose? Could you run a snake down the line with the top off?

Taking the lid off allows you to clear debris out of the valve. Yes--you get full access to the line from the top of the valve. I use it to drain a yard that floods during high tide. Works well.

Can this valve be used under ground?

Yes, our Backwater valves can be used underground. You can also install an access sleeve (straight piece of pipe) in order to service the valve at the surface.

I received this valve and it came with a seal for the flapper. However, the seal will not stay in the grove on the flapper. Any suggestions?

Hi. It comes with 2 O rings, one is for the flapper, add some syllicon glue, like the used on motor engines, this backwater works really good,

Desertcart Logo

Deliver to Morocco

For best experience Get the App

DOWNLOAD THE APP

WE SOURCE ITEMS FROM

UAE
UK
India
USA
Japan
KOREA

Customer Services

About Us

Customer Support

Description

🛠️ Protect your space like a pro—no backflow, no worries!

TRUSTED LEGACY - Backed by Oatey’s 100+ years of plumbing expertise and industry-leading support.
TOOL FREE MAINTENANCE - Hand-tighten the threaded access cap with neoprene seal for quick, hassle-free inspections.
ULTIMATE FLOOD DEFENSE - Prevents costly basement backflow with precision-engineered valve action.
SEAMLESS SEAL TECHNOLOGY - Elastomeric flapper ensures zero leakage, keeping your space dry and secure.
VERSATILE PIPE COMPATIBILITY - Fits DWV pipes and adapts easily for sewer and drain systems—one valve, multiple uses.

The Oatey 4 in. PVC Backwater Valve is a robust plumbing solution designed to prevent sewage backflow into basements or low-lying areas. Featuring a durable PVC body, an elastomeric seal for a watertight flapper closure, and a user-friendly threaded access cap with neoprene seal, it fits standard DWV pipes and adapts for sewer and drain applications. Trusted by professionals for over a century, it offers reliable protection and easy maintenance backed by a 1-year limited warranty.

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.

1859 DH

Duties & taxes incl.

Moroccostore

Free Returns

30 daysfor PRO membership users

15 dayswithout membership

Secure Transaction

ChatGPT - opens in a new tab Perplexity - opens in a new tab Claude - opens in a new tab Grok - opens in a new tab Google AI - opens in a new tab

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Farhan Q.

The delivery time was excellent, and the packaging was secure.

2 months ago

Abdullah B.

Great price for an authentic product. Fast international shipping too!

3 weeks ago

View all Trustpilot reviews

Manufacturer	Oatey
Part Number	43904
Item Weight	4.25 pounds
Product Dimensions	12 x 9 x 8 inches
Item model number	43904
Is Discontinued By Manufacturer	No
Size	4 Inch
Color	White
Style	PVC
Material	PVC
Shape	Other
Item Package Quantity	1
Included Components	Backwater Valve
Batteries Included?	No
Batteries Required?	No
Warranty Description	1-year limited

Oatey 4 in. PVC Backwater Valve

Details

Description

Specifications

Have a Question? See What Others Asked

Common Questions