Description
Product Overview
The Korky Toilet Fill Valve Replacement Cap, model R528, is a high-quality component designed to restore and maintain toilet fill valve performance. Constructed from durable plastic and premium chlorazone red rubber, this cap resists chlorine, bacteria, and hard water, ensuring longevity and reliability. Key specifications include dimensions of 2 x 11.5 x 2 inches, a black color, and compatibility with Korky QuietFILL, Platinum, and TOTO fill valves. It features a simple installation process, requiring no batteries or special tools, and comes with a 5-year warranty for added peace of mind. Manufactured in the US by Lavelle Ind. Inc., this single-pack item is built to fit most modern and older toilet models, making it a versatile solution for common plumbing issues.

Usage
This replacement cap is ideal for residential bathrooms where toilet fill valves show signs of wear, such as inconsistent water flow or continuous running. Homeowners, DIY enthusiasts, and property managers can use it to quickly address leaks and improve water efficiency in both older and modern toilet systems. It’s suitable for environments with varying water qualities, including city-treated, hard, or well water, thanks to its resistant materials. Occasions for use include routine maintenance, emergency repairs, or upgrades to enhance toilet performance without replacing the entire valve assembly.
Why Choose Us
Korky stands out for its commitment to quality and durability, using exclusive chlorazone red rubber that outperforms standard materials in resisting degradation from water treatments. Designed and manufactured in Wisconsin, this product undergoes rigorous testing to ensure it meets high standards for universal fit and ease of installation. The 5-year warranty underscores our confidence in its longevity, providing customers with reliable support. By focusing on user-friendly designs and long-lasting components, Korky helps reduce the need for frequent replacements, saving time and money while promoting sustainable home maintenance.
Key Features
- Durable plastic construction with a premium rubber diaphragm for extended lifespan
- Easy installation without tools, fitting Korky QuietFILL, Platinum, and TOTO valves
- Chlorazone red rubber resists chlorine, bacteria, and hard water conditions
- Universal design compatible with a wide range of toilet models for versatile use
- Made in the US with a 5-year warranty for assured quality and reliability
FAQ
What toilets is this fill valve cap compatible with?
This cap is designed to fit Korky QuietFILL, Platinum, and TOTO fill valves, making it suitable for many standard toilet models. Check your existing valve type before purchase to ensure compatibility.
How do I install the Korky R528 replacement cap?
Installation is straightforward: turn off the water supply, remove the old cap, and snap the new one into place. No special tools or batteries are required, and it typically takes just a few minutes.
Does this product work with hard water?
Yes, the chlorazone red rubber is specifically formulated to resist hard water, chlorine, and other common water treatments, ensuring reliable performance over time.
Is the Korky R528 made in the United States?
Yes, this product is designed and manufactured in Wisconsin, USA, adhering to high quality standards for durability and effectiveness.
What is the warranty period for this fill valve cap?
It comes with a 5-year warranty from the manufacturer, covering defects in materials and workmanship for long-term peace of mind.




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