---
product_id: 296767091
title: "Internal Backwater Valve,4-F 4\" Float Model Flood-Guard for 4-inch Flood Drains,Drain Backflow Preventer for Sewer Flood Protection"
brand: "minimprover"
price: "AED 149"
currency: AED
in_stock: true
reviews_count: 13
category: "Minimprover"
url: https://www.desertcart.ae/products/296767091-internal-backwater-valve-4-f-4-float-model-flood-guard
store_origin: AE
region: United Arab Emirates
---

# 4-inch drain compatibility Float-activated backflow seal Solid brass durability Internal Backwater Valve,4-F 4" Float Model Flood-Guard for 4-inch Flood Drains,Drain Backflow Preventer for Sewer Flood Protection

**Brand:** minimprover
**Price:** AED 149
**Availability:** ✅ In Stock

## Summary

> 🚨 Stop floods before they start—your 4-inch drain’s new best friend!

## Quick Answers

- **What is this?** Internal Backwater Valve,4-F 4" Float Model Flood-Guard for 4-inch Flood Drains,Drain Backflow Preventer for Sewer Flood Protection by minimprover
- **How much does it cost?** AED 149 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ae](https://www.desertcart.ae/products/296767091-internal-backwater-valve-4-f-4-float-model-flood-guard)

## Best For

- minimprover enthusiasts

## Why This Product

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

## Key Features

- • **Compact & Compatible:** Designed specifically for 4-inch flood drains, fitting seamlessly into your existing system.
- • **Smart Float Mechanism:** Automatically seals drains when sewer water tries to back up, protecting your property.
- • **Effortless Installation:** Just a screwdriver and minutes to secure flood protection—no plumber needed.
- • **Precision Seal Technology:** Molded rubber gaskets create a tight, slip-free barrier against sewer backflow.
- • **Premium Corrosion Resistance:** Solid brass construction ensures long-lasting durability against rust and wear.

## Overview

The Internal Backwater Valve 4-F 4" Float Model Flood-Guard is a robust flood prevention device made from solid brass and molded rubber. Designed for 4-inch flood drains, it uses a float-activated check valve to automatically seal off sewer backflow, preventing costly water damage. Easy to install with just a screwdriver, it offers durable, corrosion-resistant protection that fits seamlessly into your home’s drainage system.

## Description

★ Great Material: The main parts are made of solid brass which is durable and corrosion resistant.The gaskets are made of molded rubber which is soft and durable. ★ Adventage: ***1.Very easliy to install just need a screwdriver. ***2.Help reduce losses, and some messy cleanup work. ***3.The embeded gasket provides strong seal without slipping. ***4.Solid brass construction for unsurpassed durability. ★ Package includes: 1Pack 2" Float Model Flood-Guard.

Review: A+ rating - A+. I deal with basement back ups when the city streets flood. Sump pump is fine, storm sewer is issue a backflow valve in the yard would cost thousands to install. This worked great so far in my basement. Last time I would’ve had an issue it barely let any water seal past the gasket edges. Usually I’d have 2-4” in the basement under these circumstances. I can probably tighten it a little more again, but it was very tight to begin with. Hold it with 1 hand and start screwing the 4 screws in a circle. Once snug you can crank it tight. Lean edges as best as possible. Mine was cast iron so hard to clean. Fit well. Works well. Also best one I’ve seen to allow water to go in, and not clog it up.
Review: Great to have a check valve - After reading a few other reviews I decided to check the material type. Screws and spring are all nonmagnetic indicating they are stainless steel. Brass plates are also nonmagnetic, everything looks good. I loosened up the screws until they were just attached then pressed in the rubber sleeve until it was free from friction contact to the brass plates. I then was able to push the unit into the 4" pipe by hand. Then tightened the screws a little bit going across like you tighten lug nuts on a wheel. This is the second check valve like this I used. The first one worked good for 15 years, just decided it was time. My neighbors had backwash problems but I didn't. After removing the original valve I saw turds at the surface of the water... Flushed them down with a hose and was very happy I had a check valve in place.

## Features

- ★ 【Material】: The main parts are made of solid brass which is durable and corrosion resistant.The gaskets are made of molded rubber which is soft and durable.
- ★ 【SIZE】: 4-F 4" Float Model Flood-Guard for 4-inch Flood Drains! Please check the size of drain tube before buying!
- ★ 【Introduction】: Flood-Guard operates like a check valve to seal off water back-up caused by overloaded sewers. Water flows normally through the drain until the sewer begins to back up. Then the Flood-Guard float rises to seal off the drain opening until the water recedes.
- ★ 【Adventage】: A screwdriver and a couple of minutes are all you need to install a Flood-Guard. Once in place, it can prevent property damage and a very messy clean-up job.
- ★ 【Package Include】: 1Pack 4" Float-guard Model Flood-Guard.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B08QHZ1YFQ |
| Best Sellers Rank | #119,213 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #495 in Flood Lights |
| Brand | Minimprover |
| Brand Name | Minimprover |
| Connector Type | Threaded |
| Customer Reviews | 4.1 out of 5 stars 373 Reviews |
| Exterior Finish | Brass |
| Inlet Connection Size | 4 Inches |
| Inlet Connection Type | Standard Pipe Thread |
| Manufacturer | Minimprover |
| Manufacturer Part Number | H087-4 |
| Material | Brass , Rubber |
| Material Type | Brass, Rubber |
| Model Number | H087-4 |
| Number of Pieces | 1 |
| Number of Ports | 2 |
| Outlet Connection Size | 4 Inches |
| Outlet Connection Type | NPT |
| Size | 4" Flood-Guard |
| Smart Home Compatibility | Not Smart Home Compatible |
| Thread Size | 4 inches |
| Thread Type | Standard Pipe Thread |
| UPC | 779880498541 |
| Unit Count | 1.0 Count |
| Valve Type | Check Valve |

## Product Details

- **Brand:** Minimprover
- **Exterior Finish:** Brass
- **Inlet Connection Size:** 4 Inches
- **Inlet Connection Type:** Standard Pipe Thread
- **Manufacturer:** Minimprover
- **Material:** Brass, Rubber
- **Number of Ports:** 2
- **Outlet Connection Size:** 4 Inches
- **Outlet Connection Type:** NPT
- **UPC:** 779880498541

## Images

![Internal Backwater Valve,4-F 4" Float Model Flood-Guard for 4-inch Flood Drains,Drain Backflow Preventer for Sewer Flood Protection - Image 1](https://m.media-amazon.com/images/I/61l9DzIp9kL.jpg)
![Internal Backwater Valve,4-F 4" Float Model Flood-Guard for 4-inch Flood Drains,Drain Backflow Preventer for Sewer Flood Protection - Image 2](https://m.media-amazon.com/images/I/611i8Sj4kpL.jpg)
![Internal Backwater Valve,4-F 4" Float Model Flood-Guard for 4-inch Flood Drains,Drain Backflow Preventer for Sewer Flood Protection - Image 3](https://m.media-amazon.com/images/I/71Hl7IzsSNL.jpg)
![Internal Backwater Valve,4-F 4" Float Model Flood-Guard for 4-inch Flood Drains,Drain Backflow Preventer for Sewer Flood Protection - Image 4](https://m.media-amazon.com/images/I/61petjfN8-L.jpg)
![Internal Backwater Valve,4-F 4" Float Model Flood-Guard for 4-inch Flood Drains,Drain Backflow Preventer for Sewer Flood Protection - Image 5](https://m.media-amazon.com/images/I/618UMumnJKL.jpg)

## Available Options

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

## Customer Reviews

### ⭐⭐⭐⭐⭐ A+ rating
*by J***. on April 8, 2024*

A+. I deal with basement back ups when the city streets flood. Sump pump is fine, storm sewer is issue a backflow valve in the yard would cost thousands to install. This worked great so far in my basement. Last time I would’ve had an issue it barely let any water seal past the gasket edges. Usually I’d have 2-4” in the basement under these circumstances. I can probably tighten it a little more again, but it was very tight to begin with. Hold it with 1 hand and start screwing the 4 screws in a circle. Once snug you can crank it tight. Lean edges as best as possible. Mine was cast iron so hard to clean. Fit well. Works well. Also best one I’ve seen to allow water to go in, and not clog it up.

### ⭐⭐⭐⭐⭐ Great to have a check valve
*by I***U on March 4, 2026*

After reading a few other reviews I decided to check the material type. Screws and spring are all nonmagnetic indicating they are stainless steel. Brass plates are also nonmagnetic, everything looks good. I loosened up the screws until they were just attached then pressed in the rubber sleeve until it was free from friction contact to the brass plates. I then was able to push the unit into the 4" pipe by hand. Then tightened the screws a little bit going across like you tighten lug nuts on a wheel. This is the second check valve like this I used. The first one worked good for 15 years, just decided it was time. My neighbors had backwash problems but I didn't. After removing the original valve I saw turds at the surface of the water... Flushed them down with a hose and was very happy I had a check valve in place.

### ⭐⭐⭐⭐ Does the job!
*by J***K on March 23, 2026*

Great product! Best advice. Inspect periodically as the spring may break. And to make it much easier to remove, make sure the drain wall is as clean and smooth as possible and lube up the rubber seal with anti-seizing lubricant.

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*Product available on Desertcart United Arab Emirates*
*Store origin: AE*
*Last updated: 2026-06-01*