---
product_id: 265162841
title: "Internal Backwater Valve,2-F 2\" Float Model Flood-Guard for 2-inch Flood Drains,Drain Backflow Preventer for Sewer Flood Protection"
brand: "minimprover"
price: "454 kr"
currency: DKK
in_stock: true
reviews_count: 13
category: "Minimprover"
url: https://www.desertcart.dk/products/265162841-internal-backwater-valve-2-f-2-float-model-flood-guard
store_origin: DK
region: Denmark
---

# float-activated backflow seal 2-inch threaded install solid brass corrosion-proof Internal Backwater Valve,2-F 2" Float Model Flood-Guard for 2-inch Flood Drains,Drain Backflow Preventer for Sewer Flood Protection

**Brand:** minimprover
**Price:** 454 kr
**Availability:** ✅ In Stock

## Summary

> 🛡️ Protect your home from sewer floods with smart, durable precision!

## Quick Answers

- **What is this?** Internal Backwater Valve,2-F 2" Float Model Flood-Guard for 2-inch Flood Drains,Drain Backflow Preventer for Sewer Flood Protection by minimprover
- **How much does it cost?** 454 kr with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.dk](https://www.desertcart.dk/products/265162841-internal-backwater-valve-2-f-2-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

- • **Smart Float-Activated Seal:** Automatically blocks sewer backflow only when needed, keeping your space dry without interrupting normal drainage.
- • **Reliable Molded Rubber Gasket:** Creates a tight, slip-free seal that prevents messy water damage and costly cleanups.
- • **Premium Solid Brass Durability:** Engineered to resist corrosion and last for years, ensuring your investment stands the test of time.
- • **Trusted by Homeowners & Pros Alike:** Top-rated valve with proven performance that keeps basements flood-free even during heavy city sewer backups.
- • **Effortless 2-inch Threaded Installation:** Get flood protection up and running in minutes with just a screwdriver—no plumber needed.

## Overview

The Minimprover 2" Float Model Flood-Guard is a high-quality internal backwater valve designed to prevent sewer backflow and flooding. Constructed from solid brass with molded rubber gaskets, it offers corrosion resistance and a secure seal. Easy to install with standard tools, this valve automatically activates a float mechanism to block reverse water flow during sewer overloads, protecting your property from costly water damage.

## 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】: 2-F 2" Float Model Flood-Guard for 2-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.
- 【Advantage】: 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 2" Float Model Flood-Guard.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B08QHY6NN2 |
| Best Sellers Rank | #23,257 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #27 in Float Valves |
| Brand Name | Minimprover |
| Connector Type | Threaded |
| Customer Reviews | 4.1 4.1 out of 5 stars (362) |
| Exterior Finish | Brass |
| Inlet Connection Size | 2 Inches |
| Inlet Connection Type | Threaded |
| Manufacturer | Minimprover |
| Material Type | Brass |
| Model Number | H087-2 |
| Number of Pieces | 1 |
| Number of Ports | 2 |
| Outlet Connection Size | 2 Inches |
| Outlet Connection Type | Threaded |
| Size | 2" Flood-Guard |
| Specification Met | ANSI B16.11, ASME B16.34 |
| Thread Size | 2 inches |
| Thread Type | Threaded |
| UPC | 779880498534 |
| Unit Count | 1.0 Count |
| Valve Type | check valve |

## Product Details

- **Brand:** Minimprover
- **Exterior Finish:** Brass
- **Inlet Connection Size:** 2 Inches
- **Inlet Connection Type:** Threaded
- **Manufacturer:** Minimprover
- **Material:** Brass
- **Number of Ports:** 2
- **Outlet Connection Size:** 2 Inches
- **Outlet Connection Type:** Threaded
- **Specification Met:** ANSI B16.11, ASME B16.34

## Images

![Internal Backwater Valve,2-F 2" Float Model Flood-Guard for 2-inch Flood Drains,Drain Backflow Preventer for Sewer Flood Protection - Image 1](https://m.media-amazon.com/images/I/61K7xcpQL4L.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 Denmark*
*Store origin: DK*
*Last updated: 2026-04-23*