Toilet Fill Valves

Products > Toilet Fill Valves

Toilet Fill Valves

BUY ONLINE

The 400A - Universal Fill Valve is available online, from our following retail partners.

IN THE UNITED STATES:

IN CANADA:

400A - Universal Fill Valve

Fluidmaster 400A Toilet Fill Valve

Click & drag to spin image (Shift + drag if zoomed in). Click to zoom in. Click thumbnail to reset.

Click & drag to spin image (Shift + drag if zoomed in). Click to zoom in. Click thumbnail to reset.

Read More

Fluidmaster®’s 400A Universal Toilet Fill Valve is the #1 best-selling fill valve in the world! A universal design, with an adjustable height from 9″ to 14″ to fit most toilets. The 400A offers quick refill rates and replaces ballcocks and other toilet fill valves. A trusted and proven toilet fill valve, the 400A is built to last from corrosion-resistant materials for a long lifespan. This code approved, anti-siphon design, won’t contaminate the fresh water supply. Some toilet models not supported: Glacier Bay® or Niagara® Flapperless Toilets, One Piece Toilets. Does not replace Side Entry Valves. Fluidmaster’s late Founder invented the fill valve technology in 1957.

The original 400A was first introduced in 1975
The #1 selling fill valve in the world
The #1 solution to fix noisy toilets
Easy to install, Universal fit
EZ-Twist height adjusts from 9″ to 14″ to fit most toilets
Trusted by toilet manufacturers and plumbers worldwide
5 year warranty

To download our free guide to fix common toilet problems please click here: Fluidmaster Toilet Repair Guide

For best performance of your toilet, consider replacing the flapper along with the fill valve. Fluidmaster recommends the 400CR Repair Kit that has both the 400A fill valve as well as the 2 inch 501 flapper.

Show Less

If your fill valve runs continuously or you hear a constant hissing sound, you may have debris trapped in the valve. This video will show you how to properly remove debris from the 400A fill valve:

If removing the debris from the 400A fill valve did not solve your problem, then the next step would be to remove and replace the cap assembly of the 400A fill valve. This video will show you how to remove & replace the cap assembly:

Watch this video on how to install the Fluidmaster 400A Fill Valve:

If you are wondering what is the difference between the 400A and the 400AH PerforMAX® fill valve, we have just the right video for you:

To check your toilet’s flush volume, please click here.

400A - Universal Fill Valve

Download Installation Instructions

Fluidmaster Recommends

Upgrade
Also Replace
Enhance

Frequently Asked Questions

What toilets will the 400A work with?
- The 400A will work in older toilets dating as far back as the 1950’s. The 400A is one of the fastest filling valves in the market and will replace most antiquated technologies like Korky, Burlington Ballcocks, Delta Pro, Danco, and many others. Top toilet brands including: American Standard, Kohler, Gerber, Briggs, Mansfield, Vortens, Eljer, Western Pottery, Jacuzzi, and many more make 2 pc toilets (and some one piece toilets) that will fit the 400A.
How do I raise the water level inside the tank after I installed the 400A?
- Once the fill valve is installed you can adjust the water level by twisting the “Tank water level adjustment screw”. Turn Clockwise for more or a higher water level and Counterclockwise for less or a lower water level.
Why does my 400A keep turning on and off throughout the day & night?
- The fill valve is working properly and is not failing this action or sound is called the “Water Waste Signal”, you may know this more commonly as “Ghost Flushing”. This is the fill valves alert system and it is alerting you that the water inside the tank is leaking out on its own. To learn more about “Ghost Flushing” click here: How to Fix a Toilet Flushing on its own or Ghost Flushing
Are there any repair parts available for my 400A?
- Yes there is, we have two repair or replacement parts available for the 400A and they are:
  
  Replacement Top Cap Assembly (model 385)
  
  Replacement Seal (model 242)
  
  Toilet Fill Valve Hardware (model 250)
Will the 400A work with my flapper?
- The 400A works independently from the flapper and will work with flapper valves
How can I tell if the 400A will work in my toilet?
- To ensure your toilet will work with the 400A simply measure the flush valve (overflow) pipe in the center of the tank. Measuring from the bottom of the tank to the top of the pipe. If the measurement is 6 inches or taller the 400A will fit the tank.
Can I use a filter with my 400A?
- Yes you can but Fluidmaster recommends against it. The 400A will let debris such as solder, rust, dirt and other minerals pass right through the valve. In situations where debris gets trapped inside the valve the top cap can be removed to purge or flush the contaminants out of the valve. To learn how to remove the top and clean the valve click here: Flushing Debris from the 400A toilet fill valve
How can I get a replacement under the warranty?
- You can request a warranty through our website page. Please view the procedure on how to file a warranty replacement here: Warranty Replacement

Problems It Fixes

WARNING:

Cancer and Reproductive Harm - www.P65Warnings.ca.gov.

BUY ONLINE

The 400A - Universal Fill Valve is available online, from our following retail partners.

IN THE UNITED STATES:

IN CANADA:

Privacy Overview

This website uses cookies to improve your experience while you navigate through the website. Out of these cookies, the cookies that are categorized as necessary are stored on your browser as they are essential for the working of basic functionalities of the website. We also use third-party cookies that help us analyze and understand how you use this website. These cookies will be stored in your browser only with your consent. You also have the option to opt-out of these cookies. But opting out of some of these cookies may have an effect on your browsing experience.

Necessary

Always Enabled

Functional cookies help to perform certain functionalities like sharing the content of the website on social media platforms, collect feedbacks, and other third-party features.

Cookie	Duration	Description
_scid	1 year 1 month	This cookie is set by Snapchat to store Snapchat Pixel unique ID of the User.
X-AB	1 day	Cookie associated with embedding content from Snapchat.

Performance cookies are used to understand and analyze the key performance indexes of the website which helps in delivering a better user experience for the visitors.

Cookie	Duration	Description
_uetsid	1 day	Bing Ads sets this cookie to engage with a user that has previously visited the website.
_uetvid	1 year 24 days	Bing Ads sets this cookie to engage with a user that has previously visited the website.
SRM_B	1 year 24 days	Used by Microsoft Advertising as a unique ID for visitors.

Analytical cookies are used to understand how visitors interact with the website. These cookies help provide information on metrics the number of visitors, bounce rate, traffic source, etc.

Cookie	Duration	Description
_ga	2 years	The _ga cookie, installed by Google Analytics, calculates visitor, session and campaign data and also keeps track of site usage for the site's analytics report. The cookie stores information anonymously and assigns a randomly generated number to recognize unique visitors.
_gat_gtag_UA_27441357_1	1 minute	Set by Google to distinguish users.
_gat_gtag_UA_27441357_5	1 minute	Set by Google to distinguish users.
_gat_UA-27441357-1	1 minute	A variation of the _gat cookie set by Google Analytics and Google Tag Manager to allow website owners to track visitor behaviour and measure site performance. The pattern element in the name contains the unique identity number of the account or website it relates to.
_gid	1 day	Installed by Google Analytics, _gid cookie stores information on how visitors use a website, while also creating an analytics report of the website's performance. Some of the data that are collected include the number of visitors, their source, and the pages they visit anonymously.
CONSENT	2 years	YouTube sets this cookie via embedded youtube-videos and registers anonymous statistical data.

Advertisement cookies are used to provide visitors with relevant ads and marketing campaigns. These cookies track visitors across websites and collect information to provide customized ads.

Cookie	Duration	Description
_fbp	3 months	This cookie is set by Facebook to display advertisements when either on Facebook or on a digital platform powered by Facebook advertising, after visiting the website.
ANONCHK	10 minutes	The ANONCHK cookie, set by Bing, is used to store a user's session ID and also verify the clicks from ads on the Bing search engine. The cookie helps in reporting and personalization as well.
fr	3 months	Facebook sets this cookie to show relevant advertisements to users by tracking user behaviour across the web, on sites that have Facebook pixel or Facebook social plugin.
MUID	1 year 24 days	Bing sets this cookie to recognize unique web browsers visiting Microsoft sites. This cookie is used for advertising, site analytics, and other operations.
sc_at	1 year 24 days	The cookie is set by Snapchat to show relevant ads to the users by tracking user behaviour on Snapchat.
test_cookie	15 minutes	The test_cookie is set by doubleclick.net and is used to determine if the user's browser supports cookies.
VISITOR_INFO1_LIVE	5 months 27 days	A cookie set by YouTube to measure bandwidth that determines whether the user gets the new or old player interface.
YSC	session	YSC cookie is set by Youtube and is used to track the views of embedded videos on Youtube pages.
yt-remote-connected-devices	never	YouTube sets this cookie to store the video preferences of the user using embedded YouTube video.
yt-remote-device-id	never	YouTube sets this cookie to store the video preferences of the user using embedded YouTube video.
yt.innertube::nextId	never	This cookie, set by YouTube, registers a unique ID to store data on what videos from YouTube the user has seen.
yt.innertube::requests	never	This cookie, set by YouTube, registers a unique ID to store data on what videos from YouTube the user has seen.

Others

Other uncategorized cookies are those that are being analyzed and have not been classified into a category as yet.

Cookie	Duration	Description
_clck	1 year	No description
_clsk	1 day	No description
_pin_unauth	1 year	This cookie is placed by Pinterest Tag when the user cannot be matched. It contains a unique UUID to group actions across pages.
_schn	session	No description available.
eId	6 days 17 hours 20 minutes	No description available.
SM	session	No description available.
wp-wpml_current_language	session	No description available.