Model # 242

Internet #100580550

Store SKU #147982

Fluidmaster Replacement Seal for Model #400A Fill Valves


Replacement Seal for Model #400A Fill Valves

$275 /each
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Frequently Bought Together

Product Overview

The Fluidmaster Replacement Seal for Model #400A Fill Valves is a great way to repair a Fluidmaster 400A fill valve without needing to purchase a new fill valve. The seal can also be used with the Home Depot-exclusive Whisper series of fill valves.

  • Durable rubber construction
  • Replaces the seal on Fluidmaster model #400A fill valves without needing to replace the entire fill valve
  • Fits The Home Depot-exclusive Whisper series of fill valves
  • Extends the life of the fill valve
  • Easy to repair

Info & Guides

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Warranty / Certifications

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Customer Questions & Answers

Will this seal work for a fluidmaster 300? I don't seem to be able to find any information on this series?

Asked by: Cuando
No, it doesn't work.
Answered by: Rainbow
Date published: 2017-05-30

Toilet fill valve seal

My toilet fill valve seal is not under the cap of my Fluidmaster 400A TOILET FILL VALVE. Can I change the toilet fill valve seal with this model ?
Asked by: pabloss
after you remve the cap, you must also remove the plastic retainer. It has two tabs that you must pry up slightly, then turn the retainer CCW. The seal is under the retainer.
Answered by: cgincolo
Date published: 2017-05-01

will this seal fit

will the fluid master 400a fit a Mansfield 208 flush valve
Asked by: kenya
Yes, this fits the fluidmaster 400A, the mansfield isn't a flush valve it's the tower or flapper like thing. I had a friend who had a $700 Kohler toilet that kept running, he didn't know the fill valve was a fluidmaster(it looked completely different then the 400a model) but when I took it apart it was the same washer inside. I have a feeling this is used in the entire line of products.
Answered by: James
Date published: 2015-11-07

We have a Replacement Seal But the pin goes all the way through is that the way it's supposed work

Asked by: ed
Thank you for your question concerning Replacement Seal for Model #400A Fill Valves. Yes! On our 242 Replacement Seal the stainless steel pin will protrude through the center. For additional questions on the Replacement Seal for Model #400A Fill Valves or any Fluidmaster product please contact us at your earliest convenience. Fluidmaster’s Technical Service Department is available Monday through Friday from 5:30 AM through 5:00 PM Pacific Standard Time. Contact options include: Chat E-Mail and Toll Free 800-631-2011.
Answered by: FluidmasterSupport
Date published: 2017-05-27
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Customer Reviews

Replacement Seal for Model #400A Fill Valves is rated 4.5 out of 5 by 20.
Rated 5 out of 5 by from Toilet was flushing fine but tank wouldn't fill up as normal.....the water would very slowly fill... Toilet was flushing fine but tank wouldn't fill up as normal.....the water would very slowly fill up. This was a nice easy and inexpensive fix. Plenty of youtube video's to walk you through it.
Date published: 2017-03-28
Rated 3 out of 5 by from Replacement part to fit special design. Replacement part to fit special design.
Date published: 2017-05-30
Rated 5 out of 5 by from Easy 30-second Fix If you're having issues with your tank refilling after flushing then this is probably the part you need. Both of my fill valves went bad about a month apart, roughly 2-3 years after I installed each of them. It's a shame the part wears out so quickly, but at least it's a cheap and easy repair.
Date published: 2013-05-23
Rated 5 out of 5 by from You need this! If you already have one of the 400 series valves installed you want a few of these on hand. It seems like every three years or so the valves start leaking from use and chlorine in the city water. In the past, I would go get a whole new valve for $12-14 and spend a half hour or so laying under the toilet replacing everything then dealing with the obligatory spot leaks. This seal is normally the culprit and can be replaced in just a minute with no tools and its right at the top of the tank. I keep a full 400 kit on hand with the flapper [the other part that gets hard from the chlorine] but most of the time its this seal. Pop a new one in and DONE! Then I pick up another spare on my next run to the store for next time.
Date published: 2014-03-04
Rated 5 out of 5 by from This Is The Genuine Replacement Part ... I Reccomend Having This Piece At Home For A Spare ... When The Seal Goes Bad , It Only Takes A Minute To Repair The Fill Valve ...
Date published: 2011-12-06
Rated 5 out of 5 by from Easy fix This is an easy fix for Fluidmaster not functioning properly.
Date published: 2011-09-06
Rated 5 out of 5 by from Very easy to install My toilet was very slow to fill, so I watched a youtube video to get an idea of what might be wrong. I followed the instructions on how to remove the top of the Flushmaster fill valve and checked the seal. Sure enough, it had a hole in it. The installation of the replacement seal was a breeze, and the toilet is back to normal. I can't rate quality or value, yet, because I just replaced the seal 15 minutes ago. So far, so good!
Date published: 2015-06-06
Rated 1 out of 5 by from No It Does Not Work 7-24-2016 the fill valve of guest toilet is leaking and unfortunately I have to replace the seal and all I can say it does not work at all. Tried it again and still leaks. So I check and re-check how the seal works and seems like the plunger that pushes the seal down is going thru the seal. Look at my old one and looks the same. Off to Home Depot and luckily there are 2 blister pack that was open and further investigation the seals look like the one I bought and my old. They all have the same"discrepancy" the hole for the plunger is thru. So I decided to change the fill valve. I noticed that there are at least 4 boxes of fill valve that were open and all have the same "discrepancies" the plunger for the seal is thru. I decided not to buy the Fluidmaster Universal toilet fill valve and bought Korky QuietFill Platinum Fill Valve instead, and it's been a week and still no problem yet.
Date published: 2016-07-31
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