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10 Best Toilet Fill Valves 2025 in the United States

#1

Winner

10.0 score

Fluidmaster 400H-5003 Performax Universal Toilet Fill Valve with Tank and Bowl Water Control 2-Pack, Blue

The Fluidmaster 400H-5003 Performax Universal Toilet Fill Valve 2-pack is designed to fit most toilet models, making it a versatile choice for many households. Its universal fit and EZ-Twist height adjustment (from 9 to 14 inches) help it accommodate a wide range of tanks, which means fewer compatibility worries. The valve offers tank and bowl water level dials, allowing you to customize the flush for better performance and water savings.

#2
7.6 score

TOTO TTHU134 Fill Valve Assembly with Bracket and Filter for WT151M and WT152M in Wall Tank System N/A

The Toto THU134 Fill Valve Assembly is designed for use with in-wall tank systems, specifically the WT151M or WT152M models. Its compatibility with these specific systems ensures it will fit well if you have one of these models, though it may not be suitable for other toilet configurations, limiting its versatility. The brass construction of the valve suggests good durability, as brass is known for its corrosion resistance and longevity. This can be a significant advantage in maintaining the functionality of your toilet over time.

Rating
7.6
Compatibility
Ease of Installation

Most important from
92 reviews

Compatibility
Finding the correct part can be challenging, but once obtained, it's easy to install.
Ease of Installation
Installation was a breeze and the valve has been working flawlessly ever since.
#3
7.6 score

TOTO Adjustable Replacement Fill Valve Assembly for Toilet Tanks

The TOTO TSU99A.XR Fill Valve is an adjustable fill valve designed to work with all TOTO toilet tanks, which makes it highly compatible across the brand. The adjustability ensures that it can reset your tank back to optimal performance, which is a great advantage. The package includes everything you need for installation – the valve, refill tube and clamp, cone washer, and nut, which simplifies the process.

Rating
7.6
Compatibility
Adjustability
Ease of Installation

Most important from
515 reviews

Compatibility
The TOTO TSU99A.XR Fill Valve is a quality replacement for older models, working well without issues after installation.
Adjustability
The valve is easy to adjust and universally fits, solving problems like loud filling. Following the instructions makes the process even smoother.
Ease of Installation
Installation is straightforward, especially if the old valve is removed first. The new valve fits perfectly and performs like a charm.

Top 10 Best Toilet Fill Valves 2025 in the United States

#1

Winner

10.0  score

Fluidmaster 400H-5003 Performax Universal Toilet Fill Valve with Tank and Bowl Water Control 2-Pack, Blue

Compatibility: fits most toilet models
Adjustability: EZ-Twist height 9 to 14 inches
Noise Level: quietest; minor noise possible
Durability: Plastic; 7 year limited warranty
Ease of Installation: clear, step-by-step instructions

Chosen by 1277 this week

TOTO Adjustable Replacement Fill Valve Assembly for Toilet Tanks

Compatibility: All TOTO toilet tanks
Adjustability: Adjustable
Durability: Stainless Steel, Brass
Ease of Installation: Includes valve, refill tube, clamp

Korky QuietFILL Platinum Toilet Fill Valve - Universal Fits 99% of Toilets - Easy Height Adjust for Fast Install, 528MP

Compatibility: 99% of models, 2-piece or 1-piece
Adjustability: 7.75 to 13.5 inches
Noise Level: Quiet
Durability: Plastic and red rubber
Ease of Installation: Twist-lock, less than 5 minutes

Korky QuietFILL 2X Long Life Toilet Fill Valve - Universal Fits 99% of Toilets - Easy Height Adjust for Fast Install, 528X

Compatibility: Fits 99% of toilets
Adjustability: Easily adjustable in height
Noise Level: Quiet operation
Durability: Made from resin, plastic, rubber
Ease of Installation: Quick, straightforward installation

Fluidmaster K-400H-040-T5 PerforMAX Fill Valve and 3-Inch Flapper Toilet Repair Kit, Multicolor

Compatibility: Universal, fits 3 inch toilets
Adjustability: Fine-tunes water level
Noise Level: Quieter than older fill valves
Durability: 7 year warranty, plastic material
Ease of Installation: Easy for amateurs and pros

Korky 528T Replacement TOTO Toilet Fill Valve - Fits G-Max and Power Gravity Toilets -Easy to Install -Made in USA, Black

Compatibility: TOTO toilets, G-Max, Power Gravity
Adjustability: 7-3/4 to 13-1/2 inches
Noise Level: Reduced
Durability: Metal, chlorazone rubber
Ease of Installation: Twist-lock adjustment system

Fluidmaster K-400A-5004 Universal Toilet Fill Valve and 2 in. Toilet Flapper Repair Kit

Compatibility: fits most 2-inch flush valve toilets
Adjustability: height adjusts 9 to 14 inches
Durability: Plastic, Rubber; 5 year warranty
Ease of Installation: straightforward

Kohler Genuine Part Gp1083167 Silent Fill Valve Kit For All Kohler Class Five Toilets,12.5" x 3.5" x 3"

Compatibility: Kohler Class Five toilets
Adjustability: multiple fill-rate inserts
Noise Level: Silent Fill Technology
Durability: Plastic
Ease of Installation: relatively straightforward
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Buying Guide for the Best Toilet Fill Valves

Choosing the right toilet fill valve is essential for ensuring your toilet operates efficiently and effectively. The fill valve controls the water flow into the toilet tank, and a good one can help prevent leaks, reduce noise, and ensure a proper flush. When selecting a fill valve, consider the compatibility with your toilet, the ease of installation, and the durability of the materials. Here are some key specifications to consider when choosing a toilet fill valve.
CompatibilityCompatibility refers to whether the fill valve will fit and work properly with your specific toilet model. This is important because not all fill valves are universal. To navigate this, check the manufacturer’s recommendations for your toilet model or look for fill valves labeled as 'universal' which are designed to fit most toilets. If you have a specific brand or model, it’s best to find a fill valve that is recommended for that particular toilet to ensure proper function.
AdjustabilityAdjustability in a fill valve allows you to control the water level in the tank. This is important for ensuring that your toilet flushes properly and efficiently. Fill valves with adjustable height can fit a range of tank sizes, making them versatile. If you have a standard toilet, a basic adjustable fill valve should suffice. For larger or smaller tanks, look for fill valves with a wider range of adjustability to ensure the water level is set correctly.
Noise LevelNoise level refers to how loud the fill valve is when it is refilling the tank. This is important for maintaining a quiet bathroom environment, especially if the bathroom is near living or sleeping areas. Some fill valves are designed to be quieter than others. If noise is a concern for you, look for fill valves that are specifically marketed as 'quiet' or 'silent'. These typically have features that reduce the sound of running water.
DurabilityDurability refers to how long the fill valve will last before needing replacement. This is important for long-term maintenance and cost-effectiveness. Fill valves made from high-quality materials like stainless steel or durable plastics tend to last longer. When choosing a fill valve, consider the material it is made from and look for ones with good reviews regarding their longevity. If you want a long-lasting solution, opt for a fill valve with a reputation for durability.
Ease of InstallationEase of installation refers to how simple it is to install the fill valve in your toilet. This is important for those who prefer to do their own repairs or installations. Some fill valves come with detailed instructions and require minimal tools, making them easier to install. If you are not very handy, look for fill valves that are labeled as 'easy to install' or come with comprehensive installation guides. This will save you time and potential frustration.

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