Choosing the right toilet valve replacement can improve fill speed, reduce noise, and lower water waste in your bathroom. The following five fill valves and repair kits are popular, reliable options that fit most toilets and install with minimal effort. This guide outlines each product’s standout features, installation notes, and practical benefits to help you decide which kit best matches your toilet type and maintenance goals.
| Product | Brand | Notable Benefit |
|---|---|---|
| Fluidmaster 400H-002 Performax Universal Fill Valve | Fluidmaster | Quiet, powerful fill; universal fit |
| Fluidmaster K-400H-039 PerforMAX Fill Valve Kit | Fluidmaster | Premium water control; adjustable |
| Korky QuietFILL Platinum Fill Valve | Korky | Universal fit; fast, easy height adjustment |
| Fluidmaster K-400H-021-P8 PerforMAX Everything Kit | Fluidmaster | All-in-one repair kit |
| Korky QuietFILL Universal Fill Valve | Korky | Universal fit; quick install |
Fluidmaster Performax Universal Fill Valve

The Fluidmaster 400H-002 Performax Universal Fill Valve is designed to fix noisy or slow-filling tanks with a quiet, powerful valve. It features a universal fit for most toilet brands and models, making it a versatile option for replacements. Installation is straightforward with step-by-step instructions included, enabling a quick upgrade that reduces running water and improves fill speed.
Key advantages include its broad compatibility, efficient performance, and reduced bathroom noise. The unit is built to fit multiple tank heights and bowl configurations, which helps ensure a reliable seal and consistent refills. This makes it a solid choice for homeowners seeking a simple, dependable replacement.
Fluidmaster PerforMAX K-400H-039 Fill Valve Kit

The PerforMAX K-400H-039 kit combines a high-performance fill valve with a 2-inch adjustable flapper kit, delivering premium water control and a refreshed toilet feel. The kit is designed for fast, easy installation and is especially effective on toilets with 2-inch flush valves, helping restore full flushing performance and reducing refill times.
Its adjustable tank and bowl water features allow precise water delivery for optimal performance. This makes the kit ideal for older toilets that have lost efficiency or for households seeking a noticeable upgrade in flush reliability with minimal downtime during installation.
Korky QuietFILL Platinum Fill Valve

Korky’s QuietFILL Platinum replaces worn ballcocks across most 2-piece and 1-piece toilets, providing a universal fit and a streamlined upgrade path. The valve uses a twist-lock height adjustment, which simplifies installation and ensures the right tank height for quiet, efficient filling. Most installations can be completed in under five minutes with the included hardware.
The Platinum model is built for durability and consistent performance, with a focus on reducing noise and preventing leaks. It’s a reliable option for homeowners who want a quick, low-maintenance fix that preserves toilet efficiency and reduces water waste.
Fluidmaster PerforMAX K-400H-021-P8 Everything Kit

The K-400H-021-P8 Everything Kit provides an all-in-one solution to fix a toilet in a single purchase. It includes essential components like a high-performance fill valve, a compatible flange and flapper options, and other parts typically needed for a complete repair. This kit minimizes the need for additional parts and trips to the hardware store, delivering quick, comprehensive restoration of toilet performance.
Ideal for users who want a one-and-done replacement, the kit supports a broad range of 2-inch flush valve toilets and is suitable for 1.6 to 3.5 gallons per flush configurations or larger. The PerforMAX line emphasizes improved efficiency and reliable refills with a single purchase.
Korky QuietFILL Universal Fill Valve

The Korky QuietFILL Universal Fill Valve is designed to replace a wide range of ballcocks and worn valves across 2-piece and 1-piece toilets. It’s easy to install and builds a solid foundation for reliable toilet performance. The twist-lock height adjustment helps ensure proper fit and quiet operation, with installation typically completed in minutes.
With universal compatibility and straightforward setup, this valve is well-suited for households seeking a simple, durable upgrade for consistent refills and reduced operational noise.
Buying Guide
Key purchase considerations
- Toilet compatibility: Look for universal-fit valves or kits that list compatibility with most 2-piece and 1-piece toilets to minimize fit issues.
- Valve type and size: Determine whether you need a standard fill valve (for refilling the tank) or an all-in-one repair kit that addresses multiple components.
- Height adjustment: Adjustable height helps accommodate different tank depths and ensures a proper seal and quiet operation.
- Flow and flush performance: PerforMAX and similar high-performance valves typically offer better control over tank and bowl water levels, improving flush reliability.
- Ease of installation: Quick-connect fittings, twist-lock adjustments, and clearly written instructions reduce installation time and effort.
- Water savings: Some valves optimize water delivery per flush, contributing to lower water usage over time.
- Kit contents: All-in-one kits simplify replacement by including multiple components (flappers, tubes, clips) in one package.
- Warranty and support: Choose brands with solid warranty coverage and accessible customer support for troubleshooting.
Practical comparisons
- Best for quiet operation: Fluidmaster Performax and Korky QuietFILL Platinum emphasize low-noise performance in addition to reliability.
- Best for all-in-one repair: Fluidmaster Everything Kit provides a comprehensive set of parts for a single-trip repair.
- Best for easy height adjustment: Twist-lock designs from Korky models offer simple, quick height setup for a perfect fit.
- Best for water control: PerforMAX valves (K-400H-039) provide adjustable tank and bowl water for precise refills and flush control.
- Best for old-to-modern toilets: Universal designs ensure compatibility across many brands and valve configurations, reducing the need for multiple replacements.
Overall, when selecting a toilet valve replacement, prioritize universal compatibility, ease of installation, and the specific performance characteristics that match your toilet’s flush valve size and tank height. While high-performance options can offer noticeable gains in speed and quietness, a universal, all-in-one kit may provide the best value for a broad range of toilets and bathroom layouts.