---
product_id: 309634527
title: "4 in. PVC Backwater Valve"
brand: "oatey"
price: "€ 77.62"
currency: EUR
in_stock: true
url: https://www.desertcart.ie/products/309634527-4-in-pvc-backwater-valve
store_origin: IE
region: Ireland
---

# quick-action elastomeric flapper seal hand-tightened neoprene-sealed access cap 4-inch robust PVC build 4 in. PVC Backwater Valve

**Brand:** oatey
**Price:** € 77.62
**Availability:** ✅ In Stock

## Summary

> 🛠️ Stay ahead of backflow—secure your space with smart, effortless protection!

## Quick Answers

- **What is this?** 4 in. PVC Backwater Valve by oatey
- **How much does it cost?** € 77.62 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ie](https://www.desertcart.ie/products/309634527-4-in-pvc-backwater-valve)

## 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

- • **Tool-Free Maintenance:** Threaded access cap with neoprene seal allows quick, hand-tightened inspections and cleaning.
- • **Lightweight Yet Durable:** Crafted from premium PVC, combining strength with easy installation and long-lasting performance.
- • **Seamless Seal Technology:** Elastomeric flapper ensures instant, watertight protection every time.
- • **Ultimate Backflow Defense:** Protects your property from costly sewer backflow with a reliable 4-inch valve.
- • **Versatile Pipe Compatibility:** Fits DWV pipes and adapts easily for sewer and drain systems—flexibility that fits your needs.

## Overview

The 4-inch PVC Backwater Valve by Oatey is engineered to prevent sewer backflow in low-lying areas. Featuring a quick-action elastomeric flapper for a watertight seal and a hand-tightened neoprene-sealed access cap, it offers easy maintenance without tools. Designed to fit DWV pipes and adaptable for sewer and drain systems, this lightweight yet durable valve ensures reliable, long-term protection for your property.

## Description

Oatey4 in. PVC Backwater Valve

## Features

- The product is manufactured in china
- Protects low areas or bats from backflow or waste from street sewers
- Elastomeric seal in quick action flapper ensures a water tight seal
- Threaded access cap incorporates a neoprene seal for positive sealing and can be tightened or removed by hand
- Valve hub fits DWV pipe and can be adapted for sewer and drain pipe.Threaded cap

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Manufacturer | Oatey |
| Part number | 43904 |
| Item Weight | 1.93 Kilograms |
| Product Dimensions | 30.48 x 22.86 x 20.32 cm; 1.93 kg |
| Item model number | 43904 |
| Size | 4 Inch |
| Color | White |
| Style | Flapper |
| Material | PVC |
| Shape | Other |
| Item Package Quantity | 1 |
| Measurement System | Imperial |
| Specification met | DWV |
| Included components | Backwater Valve |
| Batteries Included? | No |
| Batteries Required? | No |

## Product Details

- **Material:** PVC
- **Brand:** Oatey
- **Item dimensions L x W x H:** 30.5 x 22.9 x 20.3 centimeters
- **Inlet connection size:** 4 Inches
- **Inlet connection type:** threaded

## Images

![4 in. PVC Backwater Valve - Image 1](https://m.media-amazon.com/images/I/711ZR0mU37L.jpg)

## Available Options

This product comes in different **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

## 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 Ireland*
*Store origin: IE*
*Last updated: 2026-02-24*