---
product_id: 8526420
title: "KOHLER Silent Fill Toilet Valve Kit, Genuine Part GP1138930, Adjustable with Multiple Fill-Rate Inserts"
brand: "kohler"
price: "¥9618"
currency: JPY
in_stock: true
category: "Kohler"
url: https://www.desertcart.jp/products/8526420-kohler-silent-fill-toilet-valve-kit-genuine-part-gp1138930-adjustable
store_origin: JP
region: Japan
---

# Water-Conserving Performance Silent Fill Technology Adjustable Fill-Rate Inserts KOHLER Silent Fill Toilet Valve Kit, Genuine Part GP1138930, Adjustable with Multiple Fill-Rate Inserts

**Brand:** kohler
**Price:** ¥9618
**Availability:** ✅ In Stock

## Summary

> 🔧 Upgrade your flush game with silent precision and eco-smart control!

## Quick Answers

- **What is this?** KOHLER Silent Fill Toilet Valve Kit, Genuine Part GP1138930, Adjustable with Multiple Fill-Rate Inserts by kohler
- **How much does it cost?** ¥9618 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/8526420-kohler-silent-fill-toilet-valve-kit-genuine-part-gp1138930-adjustable)

## Best For

- kohler enthusiasts

## Why This Product

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

## Key Features

- • **Tailored Water Flow:** Customize your toilet’s fill rate with multiple inserts to optimize efficiency and reduce water waste.
- • **Whisper-Quiet Refill:** Experience tranquility with KOHLER’s patented Silent Fill technology that eliminates noisy tank refills.
- • **Seamless Compatibility:** Designed specifically for Kohler Class 5 toilets, ensuring a perfect fit and hassle-free installation.
- • **Genuine KOHLER Assurance:** Protect your investment with authentic KOHLER parts engineered for durability and peak performance.
- • **Complete Installation Kit:** Includes valve, fill hose, inserts, and hardware for a smooth, all-in-one upgrade experience.

## Overview

The KOHLER Silent Fill Toilet Valve Kit (GP1138930) is a genuine OEM replacement part engineered for Kohler Class 5 toilets. Featuring silent fill technology and adjustable fill-rate inserts, it ensures a quiet, customizable, and water-efficient tank refill. This kit includes all necessary components for easy installation and is backed by KOHLER’s commitment to quality and longevity.

## Description

Product Description Protect the warranty on KOHLER products, always look for the KOHLER GENUINE PARTS logo. KOHLER GENUINE PARTS are designed by KOHLER engineers to maintain original product performance and promote product longevity. From the Manufacturer Kohler Genuine Part, Fill Valve, For most Kohler toilets.

## Features

- Silent Fill Technology: Provides a gracious experience by filling the tank quietly
- Adjustable with Multiple Fill-rate Inserts: Are provided to optimize performance and conserve water
- Compatibility: Compatible with Kohler Class 5 toilets; confirm shank color to determine correct part; If grey, use this part and if black, use GP1083167
- Please note: Cap color may vary. Never use an abrasive material such as a brush or scouring pad to clean surfaces

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B003MH314U |
| Best Sellers Rank | #5,412 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #6 in Toilet Flush Valves |
| Brand Name | Kohler |
| Customer Reviews | 4.6 4.6 out of 5 stars (5,143) |
| Exterior Finish | White |
| Global Trade Identification Number | 00650531935076 |
| Included Components | valve, inserts, fill hose, and assembly hardware |
| Inlet Connection Size | 0.88 inches |
| Inlet Connection Type | Fill |
| Item Dimensions | 13 x 3.5 x 3 inches |
| Item Type Name | KOHLER GENUINE PART |
| Item Weight | 1 g |
| Manufacturer | KOHLER |
| Manufacturer Part Number | GP1138930 |
| Material Type | Metal, Plastic |
| Model Number | GP1138930 |
| Number of Items | 1 |
| Number of Packs | 1 |
| Number of Pieces | 1 |
| Number of Ports | 2 |
| Outlet Connection Size | 0.88 inches |
| Outlet Connection Type | Fill |
| Set Name | Silent Fill Toilet Fill Valve Kit (Includes Multiple Fill-Rate Inserts) |
| Size | 12.5" x 3.5" x 3" |
| Specification Met | oem |
| Thread Size | 0.875 inches |
| Thread Type | NPT |
| UPC | 650531935076 |
| Unit Count | 1 Count |
| Valve Type | Float Cup |

## Product Details

- **Brand:** Kohler
- **Exterior Finish:** White
- **Inlet Connection Size:** 0.88 inches
- **Inlet Connection Type:** Fill
- **Item dimensions L x W x H:** 13 x 3.5 x 3 inches
- **Material:** Metal, Plastic
- **Number of Ports:** 2
- **Outlet Connection Size:** 0.88 inches
- **Outlet Connection Type:** Fill
- **Specification Met:** oem

## Images

![KOHLER Silent Fill Toilet Valve Kit, Genuine Part GP1138930, Adjustable with Multiple Fill-Rate Inserts - Image 1](https://m.media-amazon.com/images/I/51a9xm-3myL.jpg)

## Available Options

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

## Questions & Answers

**Q: A reviewer complained that this is actually a Fluidmaster 400A.  Is that what you got or was that reviewer ripped off?**
A: It's a variation on the 400 series.  Fluidmaster makes maybe over a dozen different versions including OEM versions sold by Kohler, PerforMAX versions, ones with brass shanks, etc.  The only thing that seems to be exactly the same among all versions is the float and the (replaceable) seal.  Almost every Fluidmaster fill valve (including the 747PRO) uses the Model 242 seal.  As others noted, it comes with a set of restrictor inserts to reduce the amount of water going into the bowl.  You want to use the one that just manages to fill the bowl to the maximum around the same time as the tank is filled.  I found the green one is installed in 400A valves in an American Standard Cadet 3.  Those factory installed valves are EXACTLY the same as retail 400A valves, except for the insert and that they use a hex nut (which requires a tool to install/remove) rather than a wing nut that has to be tightened/loosened by hand.

Someone mentioned the roller clamp in the PerforMAX.  Fluidmaster has a newer one (400H) that uses a dial that varies the restriction.  Much easier to adjust than the roller clamp.  Fluidmaster has also been adding a bigger adjustment knob to most of its fill valves, so the photo might not reflect that yet.

**Q: I purchased a Kohler Fill Valve that requires you to adjust the length of the stem by turning one part in or out...Mine will not go smaller or larger?**
A: Mine had the same problem! It just spun. Somethign was stuck and I got extremely frustrated. The directions said to turn, but that did nothing. Turns out the whole base can be pulled straight out if the retaining collar is slid upward. After sliding that collar up, give it a good yank. Just don't break the valve and float at the top; I just about did. This fluidmaster video explains how. It's not the exact match, but is pretty much the same exact setup since Fluidmaster makes the official Kohler fill valve. Watch this video and you'll see what I mean: https://youtu.be/3Q-VzqqH5dg?t=1m22s

**Q: This says universal.  Can it replace the old ball and arm style fills valves?**
A: Well my Kohler toilet had a Ball and arm that came in it originally and it started leaking, and I used this to replace it. Was really quite easy to do, most difficult part is removing the water inside the tank that's left over after you turn off the water and flush. I used several old towels. You could also if you had enough space undo the fill valve and have a container to catch the water. Other than that its quite easy.

**Q: Does the Washer, Locknut and Clip come on this like the original Kohler part this replaced OR is it no longer needed with the new replacement?**
A: All required washer locknut and clip come inside the package- yes you still need them as it will install as an exact match to what was there previously

## Frequently Bought Together

- KOHLER Silent Fill Toilet Valve Kit, Genuine Part GP1138930, Adjustable with Multiple Fill-Rate Inserts
- Kohler Part 85406 2" Toilet Flush Valve Kit, Colors may vary
- Kohler (BLUE PART GP85160 FLAPPER WITH FLOAT), 2, 2 In.

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*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-10-09*