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,

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Oatey 3 in. PVC Backwater Valve

Product ID: 3438345

Details

Brand
Oatey
Exterior Finish
PVC
Inlet Connection Size
3 inches
Inlet Connection Type
threaded
Item dimensions L x W x H
8 x 7 x 7
Material
Polyvinyl

💧Elastomeric quick-action seal

🔧Hand-tightened neoprene cap

🛡️3-inch PVC durable barrier

€ 111.47

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Description

🛠️ Seal the deal on backflow before it seals your fate!

VERSATILE FIT - Designed to fit 1.5-inch Sch. 40 DWV pipes or 2-inch couplings for seamless installation.
COMPACT LIGHTWEIGHT - Only 2.35 lbs and 8x7x7 inches—powerful protection without bulk.
RAPID SEAL TECHNOLOGY - Elastomeric flapper ensures instant, watertight protection every time.
TOOL FREE MAINTENANCE - Threaded access cap with neoprene seal allows easy hand tightening or removal—no tools needed.
ULTIMATE BASEMENT DEFENSE - Stops costly backflow from street sewers, protecting your low-lying spaces.

The Oatey 3 in. PVC Backwater Valve is a robust plumbing solution designed to prevent backflow and sewage intrusion in basements and low areas. Featuring a quick-action elastomeric seal and a hand-tightened neoprene access cap, it offers reliable, tool-free maintenance and fits standard 1.5 to 2-inch pipes. Lightweight and compact, it ensures durable protection with easy installation backed by a 1-year limited warranty.

Specifications

Manufacturer	Oatey
Part Number	43900
Item Weight	2.35 pounds
Product Dimensions	8 x 7 x 7 inches
Item model number	43900
Size	3 Inch
Color	White
Style	PVC
Material	Polyvinyl Chloride
Item Package Quantity	1
Measurement System	inch
Included Components	PVC Backwater Valve
Batteries Required?	No
Warranty Description	1-year limited

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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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€ 111.47

Duties & taxes included

In stock

Sold byAmazon GERMANYDelivered 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 GERMANY.

Secure transaction

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