---
product_id: 433282442
title: "Fluidmaster K-400H-039 Toilet Fill Valve & 2-Inch Flapper Repair Kit"
brand: "fluidmaster"
price: "¥8446"
currency: JPY
in_stock: true
category: "Fluidmaster"
url: https://www.desertcart.jp/products/433282442-fluidmaster-k-400h-039-toilet-fill-valve-and-2-inch
store_origin: JP
region: Japan
---

# 2-inch adjustable flapper for leak-free flush PerforMAX fill valve for precision flow 7-year limited warranty for lasting reliability Fluidmaster K-400H-039 Toilet Fill Valve & 2-Inch Flapper Repair Kit

**Brand:** fluidmaster
**Price:** ¥8446
**Availability:** ✅ In Stock

## Summary

> 🚽 Upgrade your throne with leak-proof precision!

## Quick Answers

- **What is this?** Fluidmaster K-400H-039 Toilet Fill Valve & 2-Inch Flapper Repair Kit by fluidmaster
- **How much does it cost?** ¥8446 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/433282442-fluidmaster-k-400h-039-toilet-fill-valve-and-2-inch)

## 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

- • **Easy DIY Upgrade:** Simple installation replaces worn parts to restore toilet efficiency in minutes
- • **Trusted & Top-Ranked:** Ranked #2 in Toilet Flappers with 4.6-star rating from 4,457+ satisfied pros
- • **Durability Meets Design:** High-grade plastic construction resists wear and corrosion for long-term performance
- • **Universal 2-Inch Flapper:** Adjustable fit ensures a perfect seal, eliminating leaks and saving water
- • **Precision PerforMAX Valve:** Engineered for consistent, quiet water refill with max 80 psi pressure tolerance

## Overview

The Fluidmaster K-400H-039 Toilet Fill Valve & 2-Inch Flapper Repair Kit combines the advanced PerforMAX fill valve and an adjustable 2-inch flapper to restore and enhance toilet performance. Designed for universal 2-inch flush valves, it offers durable plastic construction, easy installation, and a 7-year limited warranty. Highly rated and trusted by professionals, this kit ensures efficient, leak-free flushing and water savings.

## Description

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

## Features

- Includes a PerforMAX fill valve and 2 in. flapper kit designed to restore the performance of toilets with a 2 in. flush valve by replacing worn or outdated components.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B09NYLJ1FZ |
| Best Sellers Rank | #418 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #2 in Toilet Flappers |
| Brand Name | Fluidmaster |
| Connector Type | Female Iron Pipe, FNPT |
| Customer Reviews | 4.6 4.6 out of 5 stars (4,462) |
| Exterior Finish | Plastic |
| Global Trade Identification Number | 00039961031815 |
| Included Components | PerforMAX Toilet Fill Valve, 2-Inch Flapper |
| Inlet Connection Size | 2 inches |
| Inlet Connection Type | Female Iron Pipe |
| Item Dimensions | 3.54 x 6.3 x 2.38 inches |
| Item Type Name | Toilet Repair Kit |
| Item Weight | 13.44 ounces |
| Manufacturer | Fluidmaster |
| Manufacturer Part Number | K-400H-039-T14 |
| Manufacturer Warranty Description | 7 Year Limited |
| Material Type | Plastic |
| Maximum Pressure | 80 psi |
| Model Number | K-400H-039-T14 |
| Number of Items | 1 |
| Number of Packs | 1 |
| Number of Ports | 2 |
| Outlet Connection Size | 2 inches |
| Outlet Connection Type | FNPT |
| Set Name | SET |
| Size | Universal, for 2 In. |
| Specification Met | CSA, ULC |
| Thread Size | 2 inches |
| Thread Type | NPT |
| UPC | 039961031815 |
| Unit Count | 1 Count |
| Valve Type | PerforMAX Toilet Fill Valve |

## 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 psi
- **Number of Ports:** 2
- **Outlet Connection Size:** 2 inches
- **Outlet Connection Type:** FNPT

## Images

![Fluidmaster K-400H-039 Toilet Fill Valve & 2-Inch Flapper Repair 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.

## Frequently Bought Together

- Fluidmaster K-400H-039 High Performance Toilet Fill Valve with 2-Inch Adjustable Toilet Flapper Kit
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*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-09-01*