The word toilet fill valve might not register to most toilet owners until the toilet stops flushing and they are stuck with a dirty toilet that won’t flush.
Many may not know it, but the toilet fill valve is a vital part of the flushing mechanism as it is a device that not only detects the water level in the toilet tank but also allows for a refill when the water level drops in the toilet water tank.
Most homeowners wouldn’t bother much about the fill valve as there are plumbers to sort it out. Still, in the event that you need to replace the old fill valve, you will need to know the right new toilet fill valve that will fit your toilet, hence the question, which toilet fill valve is the best, and of course, the answer, which you will get and much more.
Top 3 Recommendations
- Best Overall – KOHLER GENUINE PART GP1083167 Silent Fill Valve Kit
- Runner Up – Fluidmaster 400ARHRKP10 PerforMAX Universal High Performance
- Best Technology – Fluidmaster 400AH PerforMAX Universal High-Performance Toilet Fill Valve
The 5 Best Toilet Fill Valve in 2021
1. KOHLER GENUINE PART GP1083167 – Best For Kohler Toilets
If you own a Kohler toilet in need of an original Kohler fill valve to replace the old one, then Kohler Genuine is your perfect choice, and the top lister amongst the best toilet fill valves on the market.
Perfectly made to match and maintain the original performance of the product, the high-quality plastic silent fill offers a quiet tank filling experience alongside an optimized and water-conservative performance thanks to its multiple fill rate inserts that run on an effective and fast refill with an effective water supply.
It is an all-fitting height model designed for the smooth operation of all Kohler Class Five Toilet models.
- Perfect Kohler toilet fill valve replacement
- Adjustable height
- Saves money and conserves water
- Requires installation tools
2. Fluidmaster 400ARHRKP10 PerforMAX – Best Toilet Valve Replacement
As one of the best replacement toilet fills valves perfect for tackling noisy toilets, running toilets, and so on, the Fluidmaster 400ARHRKP10 makes the cut.
As an all-in-one kit designed to replace inefficient toilet water fill valve and toilet flush valve, the PerforMax fill valve fits perfectly within a height range of 10-15 inches, has twice the refill rate, and is a great choice for hard water and for well water.
Unlike other fill valves, the Fluidmaster 400ARHRKP10 is ideal for use in 1.28 – 1.6 gallons per flush toilets and cancels cases of twisting or ghost flushing with its 2-inch adjustable flapper.
Also, as a full-on repair set, it includes a replacement toilet flush valve, fills flapper repair part, tank-to-bowl gasket, and toilet handles to solve the problem of most toilets.
- All-in-one repair kit
- A great choice for different water types
- Prevents cases of twisting and ghost flushing
- Not a universal replacement model
3. Fluidmaster 400AH PerforMAX Universal High-Performance Fill Valve – Best for Dual Flush Toilets
The Fluidmaster 400AH is not just considered as the quietest fill valve available, but it makes the best standard fill valve manufacturers run for their money.
Designed to fully enhance the toilet’s power, the Fluidmaster 400AH fits perfectly for dual flushing toilets, including Duo Flush with its 2x greater and faster refill rate that helps avoid inadequate toilet bowl fill levels.
Asides from that, the plastic works perfectly with high-efficiency toilets designed to aid in low water usage, with height adjustability suitable to eliminate waste. Plus it fits both old and new 2-inch flush valve toilets and is a suitable candidate for high-pressure flushing.
- Perfect for dual flushing toilet tanks
- Suitable for moderate water usage
- Twice the refill rate
- Not so long-lasting
4. TOTO TSU99A.X Adjustable Replacement Fill Valve – Best for Toto Toilets
For a Toto toilet model owner, the TOTO TSU99A.X fits all TOTO tanks as well as G-Max and Power Gravity Toilets.
Capable of resetting the tank back to optimal performance, the adjustable heights valve is considered a reliable toilet fill valve that is not only easy to install but also includes in the overall package a refill tube and clamp, a valve, a cone washer with a nut.
Plus, the environmentally friendly valve has a standard 7/8 inch inlet connection and features ECOpower with Hydrotect technology.
- Fits all TOTO models
- Easy and quick installation
- Features Ecopower with Hydrotect technology
- Most suitable for Toto models
5. Korky 528MP QuietFILL Platinum Fill Valve – Best Universal Toilet Fill Valve
As the universal fill valve, the one for all model, the Korky 528MP fits all toilet brands with the capacity to fix at least 99% of all toilet-related problems from slow to no refilling, noisy toilet, weak flush as well as the running ones.
Korky’s height can be adjusted lower than any other valve going as low as 7.75 inches all the way to 13.5 inches. Also, the refill adjuster functions perfectly to deliver the right amount of water to prevent waste.
And as an easy-to-install and quiet model, it includes a metal refill tube clip, a refill adjuster and tube tamper-proof key, coupling nuts, and more.
- Fits all universal fill valve
- Fixes up 99% of toilet problems
- Complete package with equipment
- Slightly more expensive than others.
Buying guide: How to Purchase the Best Toilet Fill Valve
When it comes to types, fill valves have 4 different types. The ballcock or plunger type is one the oldest types with a brass body which involves the floating ball attached opening and closing the plunger’s stem based on the water level. The diaphragm style valve also falls under the olden style valve. It has an anti-siphon feature with a seal that opens and closes when controlling water flow alongside a float rod adjustment screw for more flexibility.
The floatless ballcock or cupless style falls amongst the modern-day fill valves of anti-siphon fill valves that use a diaphragm that is capable of sensing water pressure instead of a float ball, used then for low flow toilets. Finally, the float cup fill valve or container type is a plastic made controlled by a floating cup attached to the fill valve shaft through a metal spring and an actuating rod.
The ballcock and diaphragm styles are not advisable for modern toilets due to their brass makes and old designs, whereas the cupless style valves and the float cup fill valves are more pro-modern, with the container type being the most advised.
Material and quality
Fill valve materials vary, with the most durable ones being made from brass, plastic, or chrome. You can have some made from silicone, but you must ensure that it is compatible with your toilet.
Best to choose the ones that can withstand corrosion as well as last longer despite multiple uses.
Many modern fill valves have been designed and fitted with subtlety and sound insulation to avoid noisy flushes and for privacy when using the toilet.
Hence, noisy fill valves are now signs of faults and problems that might require a fill valve replacement.
Height and installation
Most toilets have valves that come with adjustable height. Still, nonetheless, it is necessary to check the maximum and minimum heights of the fill valve to make sure it would fit your toilet tank and to make the installation process easy.
Why does the toilet fill valve make noise?
When you hear whistling or hissing sounds from within the toilet tank, it means that water or air is leaking from the fill valve due to it not sealing or closing properly. And the best solution is to get a new fill valve to replace it.
Why is my toilet fill valve leaking?
Your toilet valve could be leaking due to a loosened or old seal. This is because the fill valve is connected to the toilet tank and flush valve via that seal.
Can a toilet fill valve be repaired?
Yes! A fill valve can be repaired easily if the brand you are using is a common Fluidmaster fill valve brand which allows replacing just the seal rather than the whole unit.
How long do toilet fill valves last?
Toilet fill valves have a lifespan of about 5 years, and it could be longer in some cases depending, of course, on the quality of the valve, flushing frequency, and the water supply quality of the home.
When to replace the toilet fill valve?
Replacements should be done every 5 years as the lifespan of an average fill valve is 5 years.
Are Toilet Valves Universal?
Considering the fact that there are endless types of fill valves available with a variety of manufacturers finding the perfect toilet fill valve could be quite tasking.
Keep in mind that although many are interchangeable and capable of fitting a standard toilet, you would need to find the best one that fits your own toilet in terms of size, functionality, and compatibility.