---
product_id: 596234998
title: "Upgraded C-100500-K C-100500-Kit Flush Valve Cartridge Assembly Kit for m-101526-f3 503 504 Series Duct Valve, 1 Pack"
brand: "saiyugty"
price: "€ 86.18"
currency: EUR
in_stock: true
reviews_count: 8
category: "Saiyugty"
url: https://www.desertcart.hr/products/596234998-upgraded-c-100500-k-c-100500-kit-flush-valve-cartridge
store_origin: HR
region: Croatia
---

# Tool-free easy installation Compatible with Flushmate 500-504 series Durable ABS construction Upgraded C-100500-K C-100500-Kit Flush Valve Cartridge Assembly Kit for m-101526-f3 503 504 Series Duct Valve, 1 Pack

**Brand:** saiyugty
**Price:** € 86.18
**Availability:** ✅ In Stock

## Summary

> 🚽 Upgrade your flush game—because your throne deserves the best!

## Quick Answers

- **What is this?** Upgraded C-100500-K C-100500-Kit Flush Valve Cartridge Assembly Kit for m-101526-f3 503 504 Series Duct Valve, 1 Pack by saiyugty
- **How much does it cost?** € 86.18 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/596234998-upgraded-c-100500-k-c-100500-kit-flush-valve-cartridge)

## Best For

- saiyugty enthusiasts

## Why This Product

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

## Key Features

- • **Cost-Effective Upgrade:** Exceeds OEM standards while delivering exceptional value—don’t settle for less and risk costly leaks.
- • **Seamless Compatibility:** Fits Flushmate 500, 501, 503, and 504 series tanks for a hassle-free upgrade or replacement.
- • **Effortless DIY Installation:** No special tools needed—swap out your old cartridge quickly and get back to business.
- • **Built to Last with Premium ABS:** Engineered for heat and wear resistance, ensuring long-lasting performance in your pressure-assist toilet system.
- • **Complete Kit for Optimal Performance:** Includes Duckbill Valve, Filter Screen, and Cartridge Assembly for a full flush valve refresh.

## Overview

The Upgraded C-100500-K Flush Valve Cartridge Assembly Kit is a durable, ABS-made replacement part designed for pressure-assist toilets compatible with Flushmate 500-504 series. It offers easy, tool-free installation and includes all necessary components for a reliable flush valve refresh, exceeding OEM quality standards to ensure long-term performance and value.

## Description

Upgraded C-100500-K C-100500-Kit Flush Valve Cartridge Assembly Kit for m-101526-f3 503 504 Series Duct Valve, 1 Pack - desertcart.com

Review: Lo esperado - Tal como se esparava
Review: ABSOLUTE JUNK FROM CHINA - This piece of junk replacement part lasted approximately 50 flushes before it began to fail. I talked to a Flushmate representative sometime in JUNE after struggling approximately 6 weeks with a toilet that 50% of the time would not stop the water from constantly running, consequently the tank rarely filled properly. He told me he gets this type of call all day long, and wasn't surprised to hear from me on this issue since I didn't use an OEM part. His solution of course was to ONLY USE FLUSHMATE GENUINE PARTS made right here in the good old USA. As a final resort before getting rid of the the toilet I took his advice since the toilet wasn't more than 7 years old, and otherwise in good shape. I am happy to say, he was absolutely right, and I will never make that mistake again pertaining to this product. The cost of this part was no different than the cost of the junk I purchased from China on this website, $35. The only difference was I had to pay an additional $7 for shipping. Hopefully the OEM part will last as long as the original part and once it fails this time I will know exactly how to act.

## Features

- 【Replace】 The C-100500-K Replacement Flush Valve Cartridge Assembly is for Power Flush Toilet Replacement Part. The C-100500-K Flush Cartridge Kit Compatible with Flushmate Flush Valve, fits for M-101526-F3, M-101526-F4 Pressure Assist Tank.
- 【Compatible】The Model C-100500-K Flush Valve Piston Cartridge Assembly Compatible with Flushmate 500, 501, 501A, 501B, 503 and 504 Series Tank Systems. Flushmate I - 501/501A, Flushmate II - 501B, Flushmate III - 503, Flushmate IV - 504 series of toilet.
- 【Upgraded】The Flush Cartridge Kit is made of durable ABS materials, cost-effective and good value for money, the Flush valve cartridge assembly is after strict quality inspection and testing before leaving factory, exceed OEM manufacturing requirements, package include Duckbill Valve, Filter Screen, Cartridge Assembly.
- 【Easy to install】 The C-100500-K Cartridge Kit is easy to install, no special tools are required, remove the old Flush Cartridge and replace new Flush Valve Cartridge Assembly C-100500. The Cartridge Parts is made of high quality material, heat resistance, wear resistance, more durable and have a longer service life. Please Wear work gloves to protect your hands before install.
- 【Excellent Flush Valve Cartridge】This C-100500 Replacement Cartridge Part.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Brand | Saiyugty |
| Exterior Finish | ABS |
| Inlet Connection Size | 1 Inches |
| Inlet Connection Type | Compression |
| Material | Acrylonitrile Butadiene Styrene |
| Outlet Connection Type | NPT |

## Product Details

- **Brand:** Saiyugty
- **Exterior Finish:** ABS
- **Inlet Connection Size:** 1 Inches
- **Inlet Connection Type:** Compression
- **Manufacturer:** Saiyugty
- **Material:** Acrylonitrile Butadiene Styrene
- **Number of Ports:** 1
- **Outlet Connection Size:** 1 Inches
- **Outlet Connection Type:** NPT

## Images

![Upgraded C-100500-K C-100500-Kit Flush Valve Cartridge Assembly Kit for m-101526-f3 503 504 Series Duct Valve, 1 Pack - Image 1](https://m.media-amazon.com/images/I/51NAOpCCTLL.jpg)

## Questions & Answers

**Q: I'm not sure if this product is suitable for my machine?**
A: You can send your machine model to us, we will search for the right part number for you, and help you confirm whether it is suitable.

**Q: If I am not satisfied with the product I bought, can I return it?**
A: Yes. we provide 90-day return service.

**Q: Why choose Saiyugty?**
A: We have 10 years manufacturer experience in the repair part category and are committed to making safe, comfortable and durable replacement parts. Our excellent quality and perfect after-sales service can give you a better shopping experience.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Lo esperado
*by J***R on December 31, 2025*

Tal como se esparava

### ⭐ ABSOLUTE JUNK FROM CHINA
*by A***. on July 8, 2024*

This piece of junk replacement part lasted approximately 50 flushes before it began to fail. I talked to a Flushmate representative sometime in JUNE after struggling approximately 6 weeks with a toilet that 50% of the time would not stop the water from constantly running, consequently the tank rarely filled properly. He told me he gets this type of call all day long, and wasn't surprised to hear from me on this issue since I didn't use an OEM part. His solution of course was to ONLY USE FLUSHMATE GENUINE PARTS made right here in the good old USA. As a final resort before getting rid of the the toilet I took his advice since the toilet wasn't more than 7 years old, and otherwise in good shape. I am happy to say, he was absolutely right, and I will never make that mistake again pertaining to this product. The cost of this part was no different than the cost of the junk I purchased from China on this website, $35. The only difference was I had to pay an additional $7 for shipping. Hopefully the OEM part will last as long as the original part and once it fails this time I will know exactly how to act.

### ⭐⭐⭐⭐⭐ Great Replacement
*by M***E on September 12, 2025*

Works Great and Easy to Install

## Frequently Bought Together

- Upgraded C-100500-K C-100500-Kit Flush Valve Cartridge Assembly Kit for m-101526-f3 503 504 Series Duct Valve, 1 Pack
- Flushmate 9 in x 7 in x 3 in Black Plastic Powder Coated Wrench for Cartridge Removal
- Flushmate BU100505-KIT Upper Supply Kit for Pressure-Assisted Toilet Systems - Compatible with 503, 503H, 504 Series, Fits Flushmate, Kohler, Gerber, Includes Upper Supply Assembly & Hose Clamp

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*Product available on Desertcart Croatia*
*Store origin: HR*
*Last updated: 2026-03-15*