---
product_id: 639886006
title: "4\" PVC Backwater Valve, 4 Inch Back Flow Preventer Valve, Backflow Water Valve Prevents Sewage Backflow"
brand: "cinsda"
price: "A$129"
currency: AUD
in_stock: true
reviews_count: 8
category: "Cinsda"
url: https://www.desertcart.com.au/products/639886006-4-pvc-backwater-valve-4-inch-back-flow-preventer-valve
store_origin: AU
region: Australia
---

# Easy solvent-weld installation Watertight EPDM & rubber seals 4-inch PVC durable build 4" PVC Backwater Valve, 4 Inch Back Flow Preventer Valve, Backflow Water Valve Prevents Sewage Backflow

**Brand:** cinsda
**Price:** A$129
**Availability:** ✅ In Stock

## Summary

> 🚫💧 Stop Backflow Before It Starts — Protect Your Space Like a Pro!

## Quick Answers

- **What is this?** 4" PVC Backwater Valve, 4 Inch Back Flow Preventer Valve, Backflow Water Valve Prevents Sewage Backflow by cinsda
- **How much does it cost?** A$129 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.au](https://www.desertcart.com.au/products/639886006-4-pvc-backwater-valve-4-inch-back-flow-preventer-valve)

## Best For

- cinsda enthusiasts

## Why This Product

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

## Key Features

- • **Built to Last:** High-impact, corrosion-resistant PVC ensures long-term durability
- • **Versatile Application:** Perfect for indoor/outdoor drainage, septic, garden, and industrial use
- • **Plug & Play Installation:** Solvent-weld compatible for quick, hassle-free setup
- • **Seamless Seal Technology:** Thickened rubber rings and EPDM cover guarantee zero leaks
- • **Ultimate Backflow Defense:** Prevents sewage backflow to protect your home and health

## Overview

This 4-inch PVC backwater valve is engineered to prevent sewage backflow in drainage systems. Constructed from sturdy, corrosion-resistant PVC with thick rubber and EPDM seals, it ensures a watertight barrier. Designed for easy solvent-weld installation, it fits seamlessly into residential and industrial sewer and drainage pipelines, safeguarding your property from costly water damage.

## Description

Wide range of uses: Made of hard PVC and corrosion resistance. Perfect for indoor and outdoor use, drainage and sewer piping systems; patio, lawn, garden, and septic tank piping systems etc. Installed in the PVC drain and sewer pipe system.

Review: French Drain backflow preventer - Works as it should
Review: Handy man - Buena calidad,evitar cuando limpia el gobierno sistema sanitario

## Features

- Designed for connecting 4-inch PVC drains in the drainage system, this valve prevents the backflow of water in the pipeline due to pressure reduction or other potential causes.
- The backwater valve is made of sturdy PVC for high impact strength and resistance to heat and corrosion.
- Our back flow preventer valve can be solvent-welded for a watertight connection. The installation is simple and efficient.
- Thickened rubber rings embedded in the water stop baffle guarantee a watertight seal, and the access cover is also sealed with EPDM rubber to prevent water leakage.
- The backflow valve, as part of the DWV system, is suitable for connecting PVC sewers and drains. Ideal for sewage disposal in household and certain industries, it prevents sewer backflow.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Brand | Cinsda |
| Color | White |
| Connector Type | Tee |
| Item dimensions L x W x H | 9.8 x 7 x 6.78 inches |
| Material | Polyvinyl Chloride |
| Size | 4 Inch |

## Product Details

- **Material:** Polyvinyl Chloride
- **Brand:** Cinsda
- **Item dimensions L x W x H:** 9.8 x 7 x 6.78 inches
- **Exterior Finish:** PVC
- **Inlet Connection Size:** 4 Inches
- **Inlet Connection Type:** Solvent
- **Outlet Connection Type:** Socket Coupling
- **Outlet Connection Size:** 4 Inches
- **Manufacturer:** Cinsda

## Images

![4" PVC Backwater Valve, 4 Inch Back Flow Preventer Valve, Backflow Water Valve Prevents Sewage Backflow - Image 1](https://m.media-amazon.com/images/I/61VNt5B7hVL.jpg)

## Available Options

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

## Customer Reviews

### ⭐⭐⭐⭐⭐ French Drain backflow preventer
*by R***S on October 10, 2025*

Works as it should

### ⭐⭐⭐⭐⭐ Handy man
*by 2***3 on September 24, 2025*

Buena calidad,evitar cuando limpia el gobierno sistema sanitario

### ⭐⭐⭐⭐⭐ Buried
*by A***R on September 15, 2025*

Seemed good enough, we'll find out if water doesn't backflush

## Frequently Bought Together

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- Tondiamo Backwater Valve Drain Backflow Preventer Valve Prevent Sewage and Rainwater from Flowing Back(White PVC,4 Inch)

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**Shop now:** [https://www.desertcart.com.au/products/639886006-4-pvc-backwater-valve-4-inch-back-flow-preventer-valve](https://www.desertcart.com.au/products/639886006-4-pvc-backwater-valve-4-inch-back-flow-preventer-valve)

---

*Product available on Desertcart Australia*
*Store origin: AU*
*Last updated: 2026-02-11*