---
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: "$U2603"
currency: UYU
in_stock: true
reviews_count: 8
category: "Minimprover"
url: https://www.desertcart.uy/products/265162841-internal-backwater-valve-2-f-2-float-model-flood-guard
store_origin: UY
region: Uruguay
---

# 2" float valve seals flood backflow Easy 5-min screwdriver install Solid brass corrosion-proof build 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:** $U2603
**Availability:** ✅ In Stock

## Summary

> 🌊 Seal the flood, save your space—because backup is not an option!

## 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?** $U2603 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.uy](https://www.desertcart.uy/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

- • **Premium Durability:** Crafted from solid brass and molded rubber gaskets for unbeatable corrosion resistance and long-lasting performance.
- • **Smart Flood Defense:** Float-activated valve automatically seals your drain when sewer backflow threatens your space.
- • **Compact & Compatible:** Designed for standard 2-inch flood drains with threaded connections for a snug, leak-proof fit.
- • **Mess-Free Protection:** Prevent costly water damage and the nightmare of messy cleanups with a reliable backwater valve.
- • **Effortless Installation:** Get flood protection up and running in minutes with just a screwdriver—no plumber needed.

## Overview

The Minimprover Internal Backwater Valve is a 2-inch float model flood-guard designed to prevent sewer backflow and protect your property from flood damage. Made from solid brass with durable molded rubber gaskets, it offers corrosion resistance and a tight seal. Easy to install with just a screwdriver, this valve automatically activates when sewer water tries to back up, ensuring mess-free flood protection for your home or business.

## 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: This is a very good item. Priced very fairly. Well made. - This is excellent. I replaced one that I had for years but corroded. The key to using these is to put it down into the PVC tube just far enough that the center "pin" sticking up is about 1/4 inch below the level of the floor. This is made well, is a quality item, and is easy to install. I may buy another one so that in 20 years when this one is all nasty, I can replace it easily.

## 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 |
|---------------|-------|
| Brand | Minimprover |
| Exterior Finish | Brass |
| Inlet Connection Size | 2 Inches |
| Inlet Connection Type | Threaded |
| Material | Brass |
| Outlet Connection Type | Threaded |

## 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)

## 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.

### ⭐⭐⭐⭐⭐ This is a very good item. Priced very fairly. Well made.
*by D***. on March 21, 2025*

This is excellent. I replaced one that I had for years but corroded. The key to using these is to put it down into the PVC tube just far enough that the center "pin" sticking up is about 1/4 inch below the level of the floor. This is made well, is a quality item, and is easy to install. I may buy another one so that in 20 years when this one is all nasty, I can replace it easily.

### ⭐⭐⭐⭐ 2" Model Poorly Designed - Requires Modifications
*by C***N on February 7, 2022*

The 2" model is a much poorer design than the others. Because it uses only 2 screws instead of 4 it is very easy to accidently get the rubber O-Ring misaligned and then you have to start the whole process over again. Be very careful when inserting this and tightening it to get it perfectly straight in the drain! It comes fully tightened and will not fit in your drain in this config. You need to almost fully loosen the two side screws. The O ring will then get sucked a bit into the sides of the device. The main problem however is that the spring is simply WAY too strong. I suspect they used the same spring and design from the larger models which would have much more water on top compressing it down. To make this work you will need to: 1. Cut a few coils off the spring. This depends on how far down you can insert the device (farther is generally better as there will be more water weight on top to open it). Make sure you are ABOVE any kind of standard P trap! 2. Once you cut off coils from the spring the spring will now not go the full length of the screw. You need to buy some very small washers to fill this gap. 3. Tune the tension of the spring and the amount of washers with the device MOSTLY tightened. As you tighten the device it changes the length and therefore the amount of seal the float will make. If you decide on the amount of washers when it is fully loosened you will be in for a bad time when the float now no longer seals via the spring. I used in total about 5 washers after a lot of experimentation and I cut maybe 4 coils approximately off the spring. I tied a small string to the middle bar of the device in two places (on either side of the screw) so I could lower it evenly. Make sure to carefully tighten each side evenly and if it gets at all misaligned / angled within the pipe start over. If its angled then its not going to form an air tight seal. I also put lasco pure silicone grease over the O-Ring and the float to make sure it sealed better (only use pure silicone grease). And make SURE you lean the crap out of the inner wall of the pipe you are lowering into - I used a wire brush. I was only able to insert it a maximum of about 8 inches down but this setup now works great for me. No more sewer gas smell and hopefully no more backups!

## Frequently Bought Together

- Minimprover Internal Backwater Valve,2-F 2" Float Model Flood-Guard for 2-inch Flood Drains,Drain Backflow Preventer for Sewer Flood Protection
- G Green Drain Waterless Trap Seal, 2 Inch
- Shower Drain Floor Drain Backflow Preventer Magnetic Levitation One-Way Drain Valve Fast Drainage Shower plug Insert Drain Plug Fit for Tube Depth 2.56-4.13in (Caliber（2-3.9in）,Depth 3,15in)

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.uy/products/265162841-internal-backwater-valve-2-f-2-float-model-flood-guard](https://www.desertcart.uy/products/265162841-internal-backwater-valve-2-f-2-float-model-flood-guard)

---

*Product available on Desertcart Uruguay*
*Store origin: UY*
*Last updated: 2026-03-16*