---
product_id: 433282442
title: "Fluidmaster K-400H-039 High Performance Toilet Fill Valve with 2-Inch Adjustable Toilet Flapper Kit"
brand: "fluidmaster"
price: "144.44 DT"
currency: TND
in_stock: true
reviews_count: 13
category: "Fluidmaster"
url: https://www.desertcart.tn/products/433282442-fluidmaster-k-400h-039-high-performance-toilet-fill-valve-2
store_origin: TN
region: Tunisia
---

# Adjustable water control for optimal flush Easy install with universal 2-inch fit 7-year warranty for lasting reliability Fluidmaster K-400H-039 High Performance Toilet Fill Valve with 2-Inch Adjustable Toilet Flapper Kit

**Brand:** fluidmaster
**Price:** 144.44 DT
**Availability:** ✅ In Stock

## Summary

> 🚽 Upgrade your flush game with precision and ease—because your throne deserves the best!

## Quick Answers

- **What is this?** Fluidmaster K-400H-039 High Performance Toilet Fill Valve with 2-Inch Adjustable Toilet Flapper Kit by fluidmaster
- **How much does it cost?** 144.44 DT with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/products/433282442-fluidmaster-k-400h-039-high-performance-toilet-fill-valve-2)

## Best For

- fluidmaster enthusiasts

## Why This Product

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

## Key Features

- • **Trusted Longevity:** Backed by a 7-year limited warranty, this kit is engineered to keep your toilet running like new.
- • **Effortless Installation:** No YouTube tutorials needed—quick, straightforward setup saves you time and hassle.
- • **Precision Water Control:** Dial in your perfect flush with adjustable tank and bowl water settings for maximum efficiency.
- • **Water-Saving Innovation:** Includes PerforMAX flapper designed to reduce water use per flush without sacrificing performance.
- • **Durable & Corrosion-Resistant:** Built with a solid frame and corrosion-resistant flapper to ensure a secure, leak-free seal.

## Overview

The Fluidmaster K-400H-039 is a high-performance toilet fill valve and 2-inch adjustable flapper kit designed for universal 2-inch flush valve toilets. Featuring adjustable water control for both tank and bowl, corrosion-resistant materials, and a solid frame for a secure seal, it ensures a powerful, water-efficient flush. Easy to install and backed by a 7-year warranty, this kit is a top-rated, reliable upgrade that keeps your toilet running quietly and efficiently.

## Description

Fluidmaster K-400H-039 High Performance Toilet Fill Valve with 2-Inch Adjustable Toilet Flapper Kit

Review: Easy to Install and Works Great - Excellent product at a good price. I installed it and works fine. Very good instructions. These last a long time.
Review: The Sound Changed… and That’s When I Knew - Before installing this, the toilet had a certain sound. Inconsistent. Slightly drawn out. Just enough to notice every time. After installing this, that sound changed. The refill became quicker, smoother, and more controlled. No weird noises, no hesitation—just a clean, efficient cycle that finishes without dragging on. Installation was straightforward, adjustments were easy, and once it was set, it stayed consistent. You don’t think about it often—but when something works this smoothly, you notice the difference.

## Features

- The PerforMAX fill valve and 2 in. Flapper Kit is the premium solution to make your 2 in. flush valve toilet run like new
- PerforMAX toilet fill valve offers high performance with adjustable tank and bowl water for full water control
- Fast and Easy to Install
- PerforMAX Water-Saving Toilet Flapper included to save water use per flush
- Adjustable fill valve height to fit more tanks, corrosion resistant flapper, Solid frame for a secure seal, 7 year warranty

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B09NYLJ1FZ |
| Best Sellers Rank | #551 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #2 in Toilet Flappers |
| Brand | Fluidmaster |
| Brand Name | Fluidmaster |
| Color | Multicolor |
| Customer Reviews | 4.6 out of 5 stars 4,050 Reviews |
| Global Trade Identification Number | 00039961031815 |
| Included Components | PerforMAX Toilet Fill Valve, 2-Inch Flapper |
| Installation Method | Toilet |
| Installation Type | Toilet |
| Item Dimensions D x W x H | 30"D x 8"W x 6"H |
| Item Type Name | Toilet Repair Kit |
| Item Weight | 13.6 Ounces |
| Manufacturer | Fluidmaster |
| Manufacturer Part Number | K-400H-039-T14 |
| Manufacturer Warranty Description | 7 Year Limited |
| Material | Plastic |
| Material Type | Plastic |
| Model Number | K-400H-039-T14 |
| Product Dimensions | 30"D x 8"W x 6"H |
| Shape | shape |
| Smart Home Compatibility | Not Smart Home Compatible |
| UPC | 039961031815 |
| Unit Count | 1.0 Count |

## Product Details

- **Brand:** Fluidmaster
- **Exterior Finish:** Plastic
- **Inlet Connection Size:** 2 Inches
- **Inlet Connection Type:** Female Iron Pipe
- **Item dimensions L x W x H:** 3.54 x 6.3 x 2.38 inches
- **Material:** Plastic
- **Maximum Operating Pressure:** 80 Pound per Square Inch
- **Number of Ports:** 2
- **Outlet Connection Size:** 2 Inches
- **Outlet Connection Type:** FNPT

## Images

![Fluidmaster K-400H-039 High Performance Toilet Fill Valve with 2-Inch Adjustable Toilet Flapper Kit - Image 1](https://m.media-amazon.com/images/I/71FddZ8DTML.jpg)

## Available Options

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

## Questions & Answers

**Q: will this replace a 400A on an american standard 4392?**
A: Yes this will replace the 400A and flapper that is in that model of tank. For more information please contact Fluidmaster’s Technical Service Department, we are available Monday through Friday from 5:30 AM through 5:00 PM Pacific Standard Time. Contact options include: Chat www.fluidmaster.com/support E-Mail techsupport@fluidmaster.com and Toll Free 800-631-2011.

**Q: My new one leaks a little when you flush. Under the blue cap just a few drops than it stops leaking. Is this a normal release of water when flushed ?**
A: I would have been thrilled if mine had only leaked a few drops.  Mine sprayed water like a fire hose so I returned it.

**Q: Will this fit a Kohler 1.6 gallon toilet?**
A: I see no reason why not, unless your tank is too low to put the tank lid or cover back on. check height of fill valve and tank depth

**Q: Does this work with the toilets that does not have handles.. we have the one where you have to push the button in the center top of the tank.. Thanks**
A: The part you are buying is the tube that refills the tank after the flush has occurred.  Whether the flush is because of a handle or a button on the top of the tank. this unit is is separate from that action.  The flapper valve included may or may not work with your tank but the unit itself to fill the tank over and over will work just fine.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Easy to Install and Works Great
*by H***B on April 5, 2026*

Excellent product at a good price. I installed it and works fine. Very good instructions. These last a long time.

### ⭐⭐⭐⭐⭐ The Sound Changed… and That’s When I Knew
*by W***A on March 19, 2026*

Before installing this, the toilet had a certain sound. Inconsistent. Slightly drawn out. Just enough to notice every time. After installing this, that sound changed. The refill became quicker, smoother, and more controlled. No weird noises, no hesitation—just a clean, efficient cycle that finishes without dragging on. Installation was straightforward, adjustments were easy, and once it was set, it stayed consistent. You don’t think about it often—but when something works this smoothly, you notice the difference.

### ⭐⭐⭐⭐⭐ INEXPENSIVE. EASY. WORKS.
*by T***S on September 21, 2025*

Worked like a champ. Easy to install and dial in without a youtube video even lol. Saw another reviewer mentioning the flapper didn’t fit because he bought a 3” and needed a 2” but didn’t know where to measure. Well, logic would dictate it being the hole it’s plugging, right? Perhaps? Just maybe? Just lift the flapper, eyeball the opening it was plugging. If it’s the size of an Oreo, you got a 2”. A baseball, you got a 3”. If your toilet was made after 2000, it could be a 3”. But before 2000, more than likely a 2”. If you’re uncertain, they make versions of this item without the flapper and you can purchase that part separately or as needed. As for measuring it? Use the ruler app on your phone to estimate without sticking a tape measure in your refill container. (Wink). That said, the flush is much stronger now, there were no leaking after install. The build quality seems fine, and these are inexpensive enough to not expect decades of use. My only complaint is the plastic or rubber tube to connect the water was a bit shorter than my previous one and interfered with the flush lever, so I had to use my previous one which was fine. I mentioned that specifically because some users described having to cut the included tube to make it shorter. In my case the reverse was true and mine was too short. Pause. All in all, a simple, inexpensive fix and I think I’ll replace the others in my house as well so they can race to see which lasts longest. Lol. 10/10 would recommend.

## Frequently Bought Together

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*Product available on Desertcart Tunisia*
*Store origin: TN*
*Last updated: 2026-06-01*