---
product_id: 764578787
title: "Internal Backwater Valve,4-F 4\" Float Model Flood-Guard for 3-inch Flood Drains,Drain Backflow Preventer for Sewer Flood Protection"
brand: "minimprover"
price: "₨1912"
currency: SCR
in_stock: false
reviews_count: 5
category: "Minimprover"
url: https://www.desertcart.sc/products/764578787-internal-backwater-valve-4-f-4-float-model-flood-guard
store_origin: SC
region: Seychelles
---

# 3-inch drain compatibility Float-activated backflow seal Solid brass durability Internal Backwater Valve,4-F 4" Float Model Flood-Guard for 3-inch Flood Drains,Drain Backflow Preventer for Sewer Flood Protection

**Brand:** minimprover
**Price:** ₨1912
**Availability:** ❌ Out of Stock

## Summary

> 🚨 Stop floods before they start — your 3" drain’s new best friend!

## Quick Answers

- **What is this?** Internal Backwater Valve,4-F 4" Float Model Flood-Guard for 3-inch Flood Drains,Drain Backflow Preventer for Sewer Flood Protection by minimprover
- **How much does it cost?** ₨1912 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.sc](https://www.desertcart.sc/products/764578787-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

- • **Brass-Built to Last:** Corrosion-resistant solid brass ensures long-term flood defense without rust or wear.
- • **Quick DIY Installation:** Install in minutes with just a screwdriver—no expensive plumber needed, saving time and money.
- • **Mess-Free Flood Protection:** Prevents basement backups and messy cleanups, giving you peace of mind during heavy storms.
- • **Precision Fit for 3" Drains:** Specifically engineered for 3-inch flood drains, guaranteeing seamless installation and optimal performance.
- • **Smart Float Seal Technology:** Automatically seals off sewer backflow when water levels rise, protecting your property from costly damage.

## Overview

The Minimprover Internal Backwater Valve is a robust, brass-constructed flood-guard designed for 3-inch drains. Featuring a float-activated check valve, it automatically seals off sewer backflow during heavy rains, preventing basement flooding and property damage. Easy to install with minimal tools, it offers reliable, maintenance-friendly protection that outperforms typical backflow preventers.

## Description

Minimprover Internal Backwater Valve,4-F 4" Float Model Flood-Guard for 3-inch Flood Drains,Drain Backflow Preventer for Sewer Flood Protection : desertcart.in: Home Improvement

Review: 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: Everything else I could find for this size range is simply not performing up to the expected degree. This one does the job and does the job well

## 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】: 3-F 3" Float Model Flood-Guard for 3-inch Flood Drains
- 【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 3" Float Model Flood-Guard.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B09HXPLT95 |
| Best Sellers Rank | #332,058 in Home Improvement ( See Top 100 in Home Improvement ) #6,592 in Drain Strainers |
| Brand | Minimprover |
| Exterior Finish | Brass |
| Inlet Connection Size | 3 Inches |
| Inlet Connection Type | FNPT |
| Item Weight | 209 g |
| Item model number | H087-3 |
| Manufacturer | Minimprover |
| Material | Brass |
| Net Quantity | 1.0 Count |
| Number of Ports | 3 |
| Outlet Connection Size | 3 Inches |
| Outlet Connection Type | FNPT |
| Package Dimensions | 8.2 x 8.2 x 8 cm; 209 g |
| UPC | 770773110045 |

## Product Details

- **Brand:** Minimprover
- **Exterior Finish:** Brass
- **Inlet Connection Size:** 3 Inches
- **Inlet Connection Type:** FNPT
- **Manufacturer:** Minimprover
- **Material:** Brass
- **Number of Ports:** 3
- **Outlet Connection Size:** 3 Inches
- **Outlet Connection Type:** FNPT
- **UPC:** 770773110045

## Images

![Internal Backwater Valve,4-F 4" Float Model Flood-Guard for 3-inch Flood Drains,Drain Backflow Preventer for Sewer Flood Protection - Image 1](https://m.media-amazon.com/images/I/419CNw2UIJL.jpg)
![Internal Backwater Valve,4-F 4" Float Model Flood-Guard for 3-inch Flood Drains,Drain Backflow Preventer for Sewer Flood Protection - Image 2](https://m.media-amazon.com/images/I/41H30hBGg9L.jpg)
![Internal Backwater Valve,4-F 4" Float Model Flood-Guard for 3-inch Flood Drains,Drain Backflow Preventer for Sewer Flood Protection - Image 3](https://m.media-amazon.com/images/I/41gy-Dwa9UL.jpg)
![Internal Backwater Valve,4-F 4" Float Model Flood-Guard for 3-inch Flood Drains,Drain Backflow Preventer for Sewer Flood Protection - Image 4](https://m.media-amazon.com/images/I/41nCTXgWkcL.jpg)
![Internal Backwater Valve,4-F 4" Float Model Flood-Guard for 3-inch Flood Drains,Drain Backflow Preventer for Sewer Flood Protection - Image 5](https://m.media-amazon.com/images/I/519W1zzmrQL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Review
*by J***. on 8 April 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.

### ⭐⭐⭐⭐⭐ Review
*by S***L on 3 July 2023*

Everything else I could find for this size range is simply not performing up to the expected degree. This one does the job and does the job well

### ⭐⭐⭐⭐⭐ Review
*by J***N on 8 September 2024*

I purchased the 3" version and it fit perfectly. I saw reviews saying they could not control the water going down. There is nothing to adjust really on this. The 4 screws around makes the rubber expand the form a solid seal inside the pipe so that it cannot just be pulled or pushed out. The middle screw should not have to be adjusted. The water goes down with weight. If you have a cup of water it will not go down so press the button and down it goes but if there is a bucket, the weight pushes it down and allows it to drain. Hope this makes sense. For me, it works perfectly and what I needed. I installed one in a garage drain and now will order a second for the laundry room drain. Depending where you are and your situation, you could use these instead of putting a main one where you will have to dig. In my case there are only two small drains in the basement so it makes sense.

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*Product available on Desertcart Seychelles*
*Store origin: SC*
*Last updated: 2026-02-17*