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Designed to replace old, leaky, slow filling valves, the Fluidmaster 400AH PerforMAX Universal High Performance Toilet Fill Valve is the most powerful toilet fill valve on the market (*also known as the 400ARHR). With quick and easy installation, this fill valve design eliminates noise while generating 2X greater refill rates than standard fill valve designs. A universal toilet repair part that fits most toilet models, the fill valve features a height adjustable valve shank design to adjust between 10 – 15 inches. Built to last, this replacement toilet fill valve features quality construction and a water-saving roller clamp to help save water and money by optimizing your toilet’s water usage. Best for use with high efficiency 1.28 and 1.6 gallons per flush toilets (including dual flush) and can be used with pre-1994 3.5 gallons per flush toilets. Combine with a Fluidmaster toilet flapper or flush valve for complete fill and flush optimization..
From the Manufacturer
The Fluidmaster 400AH PerforMAX Toilet Fill Valve sets the high performance standard. Designed to replace old and leaky fill valves the PerforMAX fill valve is the most powerful toilet fill valve on the market (*Also known as the 400ARHR). With quick and easy installation this fill valve design eliminates noise, while generating 2X greater refill rates than standard fill valve designs. A universal toilet repair part that fits most toilet models, with a height adjustable valve shank design. Best with 1.28 HET and 1.6 GPF toilets, including dual flush and can use with pre-1994 3.5 GPF. The water-saving roller clamp helps save water and money by optimizing your toilets water usage. Built to last this replacement toilet fill valve features quality construction with a 7 year warranty. Combine with a Fluidmaster toilet flapper, or flush valve for complete fill and flush optimization. PerforMAX the top solution for enhancing your toilets power, and eliminating noise.
KingSmitty24
Reviewed in the United States on April 14, 2025
product as described
MorrowindmaN
Reviewed in the United States on December 28, 2024
Came on time and works well !
Martin Lacombe
Reviewed in Canada on July 23, 2022
Receive 15 hours after ad place my order, easy installation in less than 10 minutes, work perfectly. Amazing product for the price, do not ask any particular skills to install. Just the instruction video explain everything
Mr. Le
Reviewed in Canada on October 25, 2022
My toilet valve gave out on me. I read the reviews of Fluidmaster products and decided to go with them. The build is very good and it's easy to install. Don't make the mistake I made, and make sure it fits your toilet. This toilet valve was a bit taller so it was hitting the top of the toilet cover. I ended up returning it and getting another Fluidmaster one that fit perfectly.
Adam
Reviewed in the United States on February 13, 2020
Oddly enough, I had the toilet fill valve go bad in ALL three of my toilets in about a 3-month period. The toilets weren't too old at only six years since the house was built, but nonetheless they needed replacements all around the same time.We picked this one up on Amazon as I had already bought one from another store and didn't realize that all three ere going to go out around the same time period. This price to this was comparable to other stores and with the convenience that I didn't have to go pick it up.Installation was a breeze. Turn off water, flush, and disconnect the water line. I did have to adjust the height slightly to make the fill hose align more correctly, but that's easily accomplished with this valve.I can't tell that filling is any faster than my old valve, but I will say it's much quieter! My old valves still worked, but were causing my toilet to run occasionally and also had a random "groan" occasionally. Now there's no running and they're all nice and quiet.Pro-tip: Make sure you don't also need a flapper to go along with the valve. I had one flapper that was pretty deformed and was causing the toilet to run. (The valve still needed to be replaced to fix the loud groans though).Overall, pretty happy with this buy. Super easy to install and solved my problem. Hopefully I can get another 6 years out of this before having to replace again.
K.A.
Reviewed in Canada on December 16, 2020
I installed it inside a Mansfield toilet to replace its float fill-valve that was getting stuck. It got in easy, it did the job, the toilet appears to be shutting off now and is not leaking. The hardest part was getting the old fill valve out.The old fill valve managed to last ~20-25 years. I don't think this thing will last quite as long: it is more complex with more moving parts. I don't find it noisier than the one it replaced, but it is noticeably slower. Not a big deal for me, and in any case I am not getting it out of there until it breaks. Which is hopefully never.
Nonzama
Reviewed in Canada on October 8, 2020
Works great so far ,easy to install and very adjustable fits almost every reservoir and price was good no complaints would definitely recommend. Will update if anything goes wrong.
James
Reviewed in the United States on October 9, 2018
I have never done any sort of plumbing repair work ever. I opened this up, turned off the water to my toilet, dropped some towels behind the toilet, and got to work. It was super easy to install, the instructions are well written, and my toilet is quieter now. All around a perfect product.I have a few points that I'd like to make about the instructions. The instructions say that you'll need a sponge and some scissors. I never needed the scissors. To handle the remaining water in the tank, I used the towels.Equipment that I used that wasn't mentioned in the instructions:Vice Grips. They come in handy during this project. If the bolts on your toilet are too tight to twist off with your hands, you'll need something like vice grips to take those bolts on and off. Even if you aren't repairing a toilet, get yourself some vice grips anyway. They are useful around the house.A mirror. I used a mirror with a stand so that I can see the bottom of the toilet. I used my wife's vanity mirror. It worked great! (Don't tell her.)Anyway, I didn't time myself on this repair job, but it was easily less than an hour, and (mind you) I have no experience with this sort of thing.
EvA
Reviewed in the United States on August 17, 2016
I wish it looked more fancy but it doesn't matter as it works great on my duo flush toilet!I ordered it for my very compact whitehouse toilet thinking, that since it works with "all toilets", it will fit in mine and be breeze to install...well I was just partially right. The installation is easy and effortless, problem was with the hight of the valve- it stocked up above toilet's tank rim. I could still close the lid on top of the tank, but the fact of elevation itself, was driving me mad. I almost wanted to return it when I realized that my other dual flush toilet (GlacierBay), has very deep tank with small flusher inside. So I swapped the fill valves and now both toilets work efficiently.I can't believe the price. Yes, the design of valve might seem very basic and outdated, but it delivers. I spent may be a week looking for a dual flush fill valve, and not only there is just handful numbers] of them available, but they are pretty expensive. I'm glad I took a gamble on this one.Water does fill quickly and seamlessly, without prolonging or annoying sound and so far (3 months), it is holding just fine.~~~*FPN:^ minimum size- almost 10"H, maximum opening 15"H,^^ good for all toilets (especially ones made after 1994), with adjustable water level and filling pressure, dual or single flush :)^^^ comes with everything necessary for installation,^^^^ assembled in Mexico
Just Jim
Reviewed in the United States on February 21, 2016
I usually purchase a 400A but I thought I would give this newer model a try. It's every bit as good as the 400A. It has excellent instructions for those who are new to changing a fill valve. The instructions are expanded over the 400A's to include using with 3" and Duo Flush valves in addition to the more traditional 2" valve. .As others have said, it is the unit is the same as the 400A with the exception of the roller clamp and hose clamps on the refill tube as well as a spiffy-looking blue cap replacing the black cap. If the internals have changed I can't tell, but it does still use the 242 replacement seal in case you are wondering. The main benefit of this valve is you can adjust the amount of water that goes into the overflow pipe. This is the water that refills the bowl after a flush. If you let too much water flow you will waste water. You need only enough water to fill the bowl. If you don't allow enough water the toiler may not flush correctly the next use. I found that I had to set the clamp down a notch to properly fill my bowl. Previously I was probably only wasting a few ounces of water but why waste if you don't have to?The 400A is a bit cheaper but this is a very worthy alternative in my opinion. This one does seem to fill a bit more quickly and slightly quieter than the replaced unit, hower the replaced one may have been a bit clogged. We have super hard water where I live and these fill valves have a rough life and plug up regularly and need cleaning out to work well again.
Phil
Reviewed in the United Kingdom on January 28, 2016
Returned as the thread is not compatable with UK threads
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