---
product_id: 9574482
title: "Oatey 4 In. PVC Backwater Valve - 1 Each"
brand: "oatey"
price: "₨52605"
currency: LKR
in_stock: true
reviews_count: 13
url: https://www.desertcart.lk/products/9574482-oatey-4-in-pvc-backwater-valve-1-each
store_origin: LK
region: Sri Lanka
---

# Elastomeric seal for leak-proof 4-inch threaded inlet/outlet Made in USA quality Oatey 4 In. PVC Backwater Valve - 1 Each

**Brand:** oatey
**Price:** ₨52605
**Availability:** ✅ In Stock

## Summary

> 🔧 Stop backflow before it starts — the pro’s choice for flawless flow control!

## Quick Answers

- **What is this?** Oatey 4 In. PVC Backwater Valve - 1 Each by oatey
- **How much does it cost?** ₨52605 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.lk](https://www.desertcart.lk/products/9574482-oatey-4-in-pvc-backwater-valve-1-each)

## Best For

- oatey enthusiasts

## Why This Product

- Trusted oatey brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Industry-Backed Excellence:** Meets ASME, ASTM, and ANSI standards for professional-grade performance.
- • **Leak-Proof Elastomeric Seal:** Advanced flapper design guarantees zero backflow, protecting your property.
- • **Precision 4-Inch Threaded Fit:** Seamlessly integrates with standard plumbing for hassle-free installation.
- • **Trusted American Craftsmanship:** Proudly made in the USA, ensuring durability and reliability you can count on.
- • **Pro-Approved for Over a Century:** Join thousands of pros who trust Oatey’s century-long legacy of plumbing innovation.

## Overview

The Oatey 4-Inch PVC Backwater Valve is a professionally engineered sewage check valve designed to prevent backflow with a durable elastomeric seal. Made in the USA and compliant with ASME, ASTM, and ANSI standards, it offers reliable, leak-proof protection for residential and commercial plumbing systems. Trusted by plumbing experts for over 100 years, this valve ensures seamless installation and long-lasting performance.

## Description

Product Description The Oatey Backwater Valve is designed as a sewage check valve to prevent pumped water from flowing back into the basin. Its elastomeric seal inside the flapper ensures a tight seal, preventing fluid from entering. Oatey products have earned the trust of plumbing professionals for over 100 years. From the Manufacturer Oatey products can be found in residential and commercial applications and have achieved excellent brand name recognition with consumers. All products are backed with the highest quality technical and customer support programs in the industry

## Features

- Made in United States

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Asin | B000BQSFJ6 |
| Best Sellers Rank | #200,038 in Tools & Home Improvement (See Top 100 in Tools & Home Improvement) #252 in Faucet Valves |
| Brand Name | Oatey |
| Connector Type | connector_type |
| Customer Reviews | 4.6 4.6 out of 5 stars (287) 4.6 out of 5 stars |
| Exterior Finish | White |
| Global Trade Identification Number | 00038753439044 |
| Included Components | Backwater Valve |
| Inlet Connection Size | 4 inches |
| Inlet Connection Type | threaded |
| Item Dimensions | 11.25 x 8 x 7.4 inches |
| Item Type Name | Oatey |
| Item Weight | 4.3 pounds |
| Manufacturer | Oatey |
| Manufacturer Part Number | 43904 |
| Manufacturer Warranty Description | 1-year limited |
| Material Type | Polyvinyl Chloride (PVC) |
| Model Number | 43904 |
| Number Of Items | 1 |
| Number Of Packs | 1 |
| Number Of Pieces | 1 |
| Number Of Ports | 1 |
| Outlet Connection Size | 4 inches |
| Outlet Connection Type | FNPT |
| Size | 4 Inch |
| Specification Met | ASME, ASTM, ANSI |
| Thread Size | 4 inches |
| Thread Type | threaded |
| Unit Count | 1 Count |
| Upc | 038753439044 |
| Valve Type | backwater,backwater valve |

## Product Details

- **Brand:** Oatey
- **Exterior Finish:** White
- **Inlet Connection Size:** 4 Inches
- **Inlet Connection Type:** threaded
- **Item dimensions L x W x H:** 11.25 x 8 x 7.4 inches
- **Material:** Polyvinyl Chloride (PVC)
- **Number of Ports:** 1
- **Outlet Connection Size:** 4 Inches
- **Outlet Connection Type:** FNPT
- **Specification Met:** ASME, ASTM, ANSI

## Images

![Oatey 4 In. PVC Backwater Valve - 1 Each - Image 1](https://m.media-amazon.com/images/I/711ZR0mU37L.jpg)
![Oatey 4 In. PVC Backwater Valve - 1 Each - Image 2](https://m.media-amazon.com/images/I/71s0SuMm6LL.jpg)
![Oatey 4 In. PVC Backwater Valve - 1 Each - Image 3](https://m.media-amazon.com/images/I/71rMyVS0O5L.jpg)
![Oatey 4 In. PVC Backwater Valve - 1 Each - Image 4](https://m.media-amazon.com/images/I/71IsHeT8dUL.jpg)
![Oatey 4 In. PVC Backwater Valve - 1 Each - Image 5](https://m.media-amazon.com/images/I/61YFxj3l4dL.jpg)

## Available Options

This product comes in different **Color, Size** options.

## Questions & Answers

**Q: 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?**
A: 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.

**Q: Can this valve be used under ground?**
A: 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.

**Q: 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?**
A: 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,

**Q: Does this fit 3" schedule 40?**
A: Yes, 3" schedule 40 PVC

## Customer Reviews

### ⭐⭐⭐⭐⭐ GREAT product, saved me!
*by  on Reviewed in the United States May 4, 2017*

This valve worked fantastic! Saved me from a flooded basement and terrace. We have had storm after storm this spring, and we have a large ravine in our front yard for storm water drainage. During long heavy rains, it does not drain fast enough and water sometimes gets up to 6 feet deep. Well our sunken terrace drains into the ravine in the front yard, so when that backs up, it actually pushes water back up the drain and starts filling the sunken terrace! This happened a month or so ago, and we had a huge mess to clean up so I ordered this backflow valve and installed it. Not a moment too soon either! A few days after it was installed on the end of the terrace drain pipe, we got another huge storm and the ravine filled up higher than I have ever seen it. The terrace continued to drain as normal and no water came back up the pipe. The ravine stayed at 6-8 feet high full of muddy storm water for quite a while before going back down. The terrace drained as normal and the basement is bone dry. Worked perfectly.

### ⭐⭐⭐⭐⭐ It has a big screw top that you can open It would also work as a clean-out.
*by  on Reviewed in the United States December 21, 2023*

I am a licensed plumber in two different states. I have worked with Oatey products for many decades. I recently purchased a home that is lower than some of the newer-built homes. There's a pump station a block or so away from my home. In the event of an extended power outage, the sewer could possibly back up to my home since it's one of the lower ones. I bought this Oatey Backwater Valve. It has a big screw top that you can open, and you can see the gate or check valve itself and pull it out to service it and clean it if needed. It would also work as a clean-out.The sewer was not deep at my home; it was only about 18 inches below grade I installed this backwater valve, and I put an irrigation box over the top of it. It's been installed for about 3 weeks with no issues whatsoever.

### ⭐⭐⭐⭐⭐ Seals well
*by  on Reviewed in the United States September 7, 2025*

Excellent product. Fits perfect, seal is excellent.

## Frequently Bought Together

- Oatey 4 in. PVC Backwater Valve
- Oatey 3 in. PVC Backwater Valve
- Supply Giant 37622CS No-Hub Coupling Heavy Duty Colored Shield, 4 inch, Red

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*Product available on Desertcart Sri Lanka*
*Store origin: LK*
*Last updated: 2026-08-23*