10 Best Toilet Fill Valves 2025 in the United States

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.

This model is praised for being one of the quietest and most powerful fill valves, providing a faster refill and stronger flush compared to standard valves. Installation is straightforward thanks to clear, step-by-step instructions, making it suitable even for DIY beginners. The durable plastic construction backed by a 7-year limited warranty adds confidence in its long-term reliability. While the valve is generally quiet, some users might notice minor noise depending on their water pressure or toilet type.

Being made of plastic rather than metal might be a drawback for those seeking maximum durability over many years. Taking into account the price and ease of use, the Fluidmaster 400H-5003 offers a solid balance of performance, quiet operation, and adjustability, making it a strong option for anyone needing to replace or upgrade their toilet fill valve.

The Kohler Genuine Part Gp1083167 Silent Fill Valve Kit is specifically designed for Kohler Class Five toilets, ensuring it fits perfectly with these models. One of its standout features is the Silent Fill Technology, which significantly reduces noise during the tank filling process, offering a more pleasant bathroom experience. This can be particularly beneficial for households where noise reduction is a priority.

Additionally, the valve kit comes with multiple fill-rate inserts, which allow users to adjust the fill rate to optimize performance and conserve water, enhancing its utility and efficiency. The kit is also engineered by Kohler to maintain the original performance of their toilets, promoting longevity and reliable function over time. However, it's important to note that this fill valve is only compatible with Kohler Class Five toilets, which limits its applicability for users with different toilet models.

The installation process is relatively straightforward, thanks to its compatibility and clear instructions, making it accessible even for those with limited DIY experience. Durability-wise, the parts are made of plastic, which is standard but might not be as robust as metal alternatives. While it is easy to install, users should be cautious when cleaning to avoid using abrasive materials that could damage the surface. This fill valve kit is a great choice for those with compatible Kohler toilets, offering quiet operation, ease of adjustment, and reliable performance, though its plastic construction and specific compatibility might be considerations for some users.

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.