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Fluidmaster 400LS Leak Sentry Pro Fill Valve
From the Manufacturer
"Locking" action alerts users to leaks before money and water are wasted. Ideal for multi-housing applications. Toilet remains fully operational.
Dan C
Reviewed in the United States on February 12, 2025
When it is time for me to replace the guts that came with the tank, I always go to Fluid Master. Simple to install, long lasting, has fit every tank I have worked on (mom, kids, mine).Highly recommend
White horse
Reviewed in Canada on April 9, 2025
This item surpasses expectations in quality and offers excellent value. Its robust construction ensures durability and reliability, making it a wise choice for any use.
G Goode
Reviewed in the United States on December 18, 2024
You NEVER know when a flapper gets dislodged, or even just a tiny fleck of sand gets on the sealing edge, and your toilet tank will slowly drain. Then the fill valve will fill it back up, and then drain again. You may have a basement toilet that does this a couple times a day and because it's rarely used, nobody notices that it's doing this. I tried the Korky ones and they all seemed to self-destruct one way or another after less than a year. Be careful with your pull chains on this one (make sure the chain that releases the self-discharge tab isn't too tight, when it is, it will destroy it over time), when you get them right this will last for many years.
Rangermenace
Reviewed in the United States on February 27, 2023
Our bedroom ceiling showed water damage and we thought it was a leak in the roof. Got worse over time but wasn't the roof turned out the upstairs bathroom tolite had a hair line fracture in bottom of the tank that wasn't noticable. After that i only use Fluidmaster Leak Sentry Pro Fill Valves instead of regular ones in all my toilets even when a friend ask me to replace theirs. I have one in first floor bathroom for many years and now replacing broken second floor with same model just in case anything happens like that again. It was spiriting water out from under the top cap while refilling the tank and i didn't know how long ago it was installed so time for new one. Old one showed it's age after I removed it just wore out.Update: After week replacing upstairs valve the down stairs failed so i ordered another. It was trickling water while refilling the tank and rust stains covered it so it did its job and couldn't remember when first installed it anyway. Short cut after removing old valve just use it to size replacement so hight will be perfect and good to put Teflon tape on threads to stop any leak. Nothing worse than spending extended time from home just to return and find the tolite tank cracked and flooded your home or find a letter from the water authority saying you are using to much water along with a sky high bill. This device is insurance against that happening to you.
Humberto Picardi
Reviewed in the United States on October 2, 2023
Flo master has a bunch of models but this one, at almost the same price as the basic one, has a brilliant feature! It will alert you if your tank is leaking water and, while you address it (if ever) the most you will lose is one tankful between flushes! This is how it works, when the tank empties, it differentites between a flush and a slow leak. if it's a flush it will refill immediately. if it's a slow leak , it won't refill until you attempt to flush the next time (you'll have to push the lever twice -first time it will refill; 2nd time it will flush- you will have to wait typically under 60 seconds, get it? It works with most standard toilets that have a chain and a flapper (I recently tried to install one at a friend's house and it does not work with the advanced one that have tewo buttons on top to choose between a small flush and a large flush)
Joanne Amendola
Reviewed in the United States on October 10, 2022
This is how they came all loose boxes all torn look like they were in a fight, both sides of the boxes were loose three of them were damaged it’s a great product but the way they shipped it was despicable
Claire H
Reviewed in Canada on September 23, 2021
Relatively easy install and a plus that I can adjust how much it fills. Instructions for install were helpful. Had it for a few months now & I can already see improvement in my water bill!
Anonymous
Reviewed in the United States on September 17, 2021
What separates this fill valve from the others is that it has a secondary chain that activates the valve so it will not continuously/intermittently fill if you have a leaky flush valve. The worst that can happen is you go to flush and the tank is empty, and activating the lever slightly start to refill it, of which it will not turn on/off after it is initially full until you touch the lever again.This model "Leak sentry" 400LS, is listed online with typical retailers, although none of the stores actually have these in stock, despite showing they are online.If you need to fix your toilet, get this, and a replacement flapper kit, and that should be all you need. An inexperienced person can do it in about an hour. After I did one, the second one took less than 15 mins. Well worth it.
Hayden
Reviewed in Canada on July 23, 2021
Good product
T. McGinnis
Reviewed in the United States on July 13, 2021
When properly installed and adjusted, this valve will prevent the flow of water in the event that the valve to the bowl leaks, which is very common. The tank might leak till it's empty, but the Leak Sentry Pro won't let the tank refill until you push the flush handle. Then it would fill up the tank, but in the meantime you haven't lost hundreds of gallons of water. I had my first one installed before I started digitizing receipts in 2012, so I've had it a long time. It started letting water into the tank when the bowl valve developed a leak, so I replaced it with another Leak Sentry Pro, because that one lasted me at least 9 years. Just be patient and get the valve installed properly. It might require a couple of adjustments to get the fill level just right and both chains the right length, but it's worth the effort.
Customer
Reviewed in Canada on October 4, 2016
I have put these in my unit and my rental units. So far so good. It is nice to know water is not being wasted and my money is no longer literally going down the toilet anymore.
Ludovick Valera
Reviewed in Canada on June 19, 2013
I bought this to replace my worn valve for a dual flush system. It is easy to install and the adjusment is not complicated. I disabled the leak sentry because you don't need this in a dual flush system. I just removed the little moving bracket which is under the float.This new unit fills faster and quieter than my older one and my older one was only 14 month old.
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