10 Best Toilet Fill Valves 2025 in the United States

The Fluidmaster 400H-002 Performax Universal Toilet Fill Valve is a popular choice for those looking to replace noisy or slow-filling valves. One of the standout features is its quiet operation, which is a significant improvement over many other fill valves, making it an excellent option for households sensitive to noise. Its universal fit ensures compatibility with most toilet models and brands, adding to its versatility.

Additionally, the EZ-Twist height adjustment feature, which ranges from 9 to 14 inches, allows for a customizable fit in various tank sizes, supporting precise water level adjustments for efficient flushes and water conservation. Installation is straightforward, thanks to the step-by-step instructions included, making it accessible even for those without professional plumbing experience.

Durability-wise, the valve is constructed from plastic and rubber, which should offer reasonable longevity, and it comes with a 7-year manufacturer warranty for added peace of mind. However, some users might find the plastic build less robust compared to metal alternatives. In summary, the Fluidmaster 400H-002 offers a solid balance of quiet performance, ease of installation, and adjustable features, making it a reliable choice for most standard toilet setups.

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.

Ease of installation is noted as being wall-mounted, which could be straightforward if you’re replacing a similar unit. However, if you’re not experienced with plumbing, installing an in-wall system can be more challenging compared to standard, exposed tank systems. The product dimensions and weight (10 x 3 x 6 inches, 4.8 ounces) make it relatively compact and lightweight, which should aid in the installation process.

In summary, the Toto THU134 appears to be a durable fill valve for specific in-wall tank systems, but its limited compatibility, unclear adjustability, and noise level should be considered.

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.

At 10 inches in height, the dimension is fairly standard and should fit most tanks comfortably. The valve uses a standard 7/8 inch inlet connection, which is common and should make finding compatible parts easier if needed. Made from durable materials like stainless steel and brass, this fill valve is designed for longevity, adding to its durability.

While the product doesn’t highlight its noise level, it’s worth noting that noise can sometimes be an issue with fill valves, so if noise reduction is a priority, you might want to investigate further. Additionally, the valve is relatively lightweight at 9.1 ounces, which should make the installation process easier. The fill valve’s high ranking in the Toilet Flush Valves category suggests it is a popular and reliable choice. This valve seems like a good fit for someone looking for a reliable and easy-to-install option specifically for TOTO toilet tanks.