Name: Adjustable Anti-siphon Toilet Fill Valve, Fluidmaster, 400A
Brand: Fluidmaster
SKU: 20RJNV4TMX1A
Price: 56.7 CAD
Availability: InStock
Rating: 4.7 (1102 reviews)

Walmart US Ecommerce Website

GENERAL MERCHANDISE

PHARMACY

GROCERIES

VUDU

SPARK

PHOTO

ADVERTISING

SAVINGS CATCHER

GIFTCARDS

INHOME

AFFILIATE

ONEAPP

LOTUS

HELP

SMART_REORDER

GROCERY

CONV_COMMERCE

Shop

The Home Event PIP banner dWeb Wk 14-15 2026

Buy Box Ad Container Module for Desktop

Custom HTML Module - About Klarna

Custom HTML Module - About SalesFinancing - Second update

You'll choose a plan at checkout.

#515357

I want delivery savings with Delivery Pass

#0071dc

NEW Fulfillment Tue Apr 15 2025 2:17 PM EDT

MTZ Team | Marquee 1 Ad | Item Page

MTZ Team | Marquee 2  Ad | Item Page

MTZ Team | Skyline Ad | Item Page

Other products of interest

MTZ Team | Sponsored Product Carousel - Item Page

More items to explore

MTZ Team | Sponsored Product Carousel - Item Page Broad 

NEW AddonServicesRedesign Fri Jul 18 2025 1:30 PM EDT

NEW AddToCart Mon Jul 14 2025 3:50 PM EDT

NEW AddToCart Tue Apr 15 2025 2:19 PM EDT

NEW BrandBoxDisplayAd Mon Jul 14 2025 9:14 PM EDT

NEW BrandLink Wed Apr 23 2025 12:07 AM EDT

NEW Breadcrumb Mon Apr 07 2025 8:23 PM EDT

Walmart Rewards Mastercard

NEW FinancingOptions Tue Dec 10 2024 3:32 PM EST

I want shipping & delivery savings with

NEW Fulfillment Mon Jul 14 2025 4:00 PM EDT

New Item Page - Nutrition Value Placeholder Module, Wednesday, February 08, 2023, 5:11:53:90 pm

New Item Page - Product Description Placeholder Module, Wednesday, February 08, 2023, 5:14:04:38 pm

New Item Page - Product Ingredients Placeholder Module, Friday, February 10, 2023, 10:34:23:79 am

New Item Page - Product Specifications Placeholder Module, Wednesday, February 08, 2023, 5:15:29:61 pm

New Item Page - Reviews Placeholder Module, Wednesday, March 22, 2023, 10:04:29:34 am

New Item Related Shelves Module, Thursday, June 15, 2023, 6:08:51:10 am

 Price Match Policy

Prices, terms, and availability may vary online, in stores, and in–app. If the advertised price is not shown here, inventory at the advertised price may now be sold out. Please see the other offers, if available, while quantities last. Some items may be available from Marketplace Sellers, who set their own prices, and are not eligible for price match. Items sold in store by Walmart may be eligible for a price match to online items shipped and sold by Walmart. For variable weight items, price shown is an estimated price only – you will be charged for the actual weight of the item. See our

NEW LegalPriceDisclaimer Mon Jul 14 2025 4:11 PM EDT

NEW LegalPriceDisclaimer Wed Apr 30 2025 12:13 AM EDT

NEW ListsAndRegistries Tue Apr 15 2025 4:50 PM EDT

NEW PaymentPlans Mon Jul 14 2025 4:15 PM EDT

NEW PaymentPlans Tue Apr 15 2025 1:31 PM EDT

NEW PriceInformation Tue Apr 15 2025 1:30 PM EDT

NEW ProductDescriptionPlaceholderATF Tue Jul 08 2025 11:41 PM EDT

NEW ProductFlags Thu Apr 10 2025 11:42 PM EDT

NEW ProductHighlightsPlaceholder Wed Jul 02 2025 12:43 AM EDT

NEW ProductImages Tue Apr 15 2025 2:13 PM EDT

NEW ProductName Tue Apr 15 2025 12:53 PM EDT

NEW ProductReturnPolicyDetails Tue Dec 10 2024 3:17 PM EST

NEW ProductReturnPolicy Mon Jul 14 2025 5:04 PM EDT

Return Policy

NEW ProductReturnPolicy Tue Apr 15 2025 2:28 PM EDT

NEW ProductStickyBuyBox Wed Jul 02 2025 12:55 AM EDT

NEW PromoDiscount Tue Apr 15 2025 6:53 PM EDT

New SellersSecondaryBuyBox Module, Tuesday, September 05, 2023, 4:02:21:76 pm

Shop Confidently

NEW ShopWithConfidence Thu Jan 15 2026 2:20 PM EST

NEW SocialProofMessage Tue Apr 15 2025 7:17 PM EDT

NEW SoldAndShippedBy Mon Jul 14 2025 5:04 PM EDT

NEW SoldAndShippedBy Tue Apr 15 2025 2:23 PM EDT

New!

More savings, less stress.

HSK_Subscribetosave_E_v2

NEW SubscriptionOptionsModule Tue Apr 15 2025 6:44 PM EDT

NEW SubscriptionPriceMessage Wed Apr 23 2025 6:48 PM EDT

NEW Variants Wed Apr 23 2025 11:01 PM EDT

[Sticky] BuyBoxAd Mon Aug 11 2025 3:59 AM EDT

[Sticky] PriceInformation Mon Jul 14 2025 4:03 PM EDT

Syndigo

True

dWeb: L1/L2- Comparison Chart- WK 07, 2026

#000000

Item Carousel - Rich Relevance 1

RR carousel

Item Carousel - Rich Relevance 2

RR carousel 2

Item Carousel - Rich Relevance 3

Adjustable Anti-siphon Toilet Fill Valve, Fluidmaster, 400A

<ul><li><strong>Prevents Water Contamination</strong>: Anti-siphon design prevents contamination of the household drinking water.</li><li><strong>Adjustable Height Fit</strong>: Shank adjusts valve height from 9" to 14" to fit most tanks.</li><li><strong>Flexible Flush Adjustment</strong>: Water lever adjusting screw for best flush.</li><li><strong>Damage-Resistant Installation</strong>: Torque Guard locknut prevents thread damage from overtightening the nut.</li></ul>

Valve Type

Size

Material

Brand

Features

Multipack Quantity

Color

Assembled Product Weight

Model

<div>The 400A fill valve revolutionized the toilet repair industry with pioneering innovation that works with, rather than against, water pressure.  Easy to install &amp; adjustable to fit most tanks &amp; comes with a 1-year warranty.  The 400A is engineered to last, and has all of the features you want, which has helped make it the #1 selling fill valve in the world.  Anti-siphon design prevents contamination of the household drinking water.  Water lever adjusting screw for best flush.  Shank adjusts valve height from 9&quot; to 14&quot; to fit most tanks.  Torque Guard locknut prevents thread damage from overtightening the nut.</div>

Manufacturer Part Number

Universal Product Code (UPC check)

fulfillment

title_shipToHome_date_free_delivery

<!DOCTYPE html>
<html>
   <head>
      <meta name="viewport" content="width=device-width, initial-scale=1">
      <link
         rel="stylesheet"
         href="https://unpkg.com/tachyons@4.12.0/css/tachyons.min.css"
         />
   </head>
   <body>
      <div class="flex flex-column justify-center w-100 ph3 normal lh-copy pt1">
            <div class="tc">
               <img src="https://i5.walmartimages.com/dfw/8822aef6-7abe/k2-_f4ee767f-a90a-4f70-be39-71e5d7b238a0.v1.jpg">
               <h3>4 equal payments</h3>
               <h4 class="gray">Buy what you love and split the cost. It's that easy. </h4>
            </div>
            <ul>
            <b>
               <li>Add item(s) to your cart.</li>
               <li>
                  Add items to checkout and choose 
                  <image height="14" width="auto" src="https://i5.walmartimages.com/dfw/8822aef6-7abe/k2-_f4ee767f-a90a-4f70-be39-71e5d7b238a0.v1.jpg"></image>
               </li>
               <li>Enter your debit or credit card information. </li>
               <li>Your first payment is taken when the order is processed, and the remaining 3 are automatically taken every two weeks.</li>
            </b>
            </ul>
            <p class="gray">Please note that a higher initial payment may be required for some purchases. Pay later in 4 <a href="https://cdn.klarna.com/1.0/shared/content/legal/terms/0/en_ca/paylaterin4" target="_blank">terms</a> available here. For Quebec residents, these Pay Later 4 <a href="https://cdn.klarna.com/1.0/shared/content/legal/terms/0/en_ca/paylaterin4_quebec" target="_blank">terms</a> are applicable. </p>
      </div>
   </body>
</html>

Ease Of Installation

Price

Instructions

Quality

Toilet

Value

Repair

Adjusting

Filling

Noise Level

Tank

Flush

Ease Of Use

Design

Has an accurate fit on most toilet tanks.

Simple installation process with minimal effort.

Offers lower cost compared to similar products.

I've used this universal repair valve for a while now whenever I have issues flushing.
Never had issues installing it. Always fit the different toilet tanks. Takes around 15 minutes to install (probably most of the time is used to removed the old one which could be 'stuck'). Would recommend it.

Great universal valve

walmart.com

I got this for my toilet that was constantly running. This was an extremely straightforward Repair. Add a picture of my old filled valves, which was different. However, these are apparently more straightforward and less likely to break in the future. Very easy to adjust the level. Came with instructions and everything was present that I needed. Longest part was just emptying the water.

Perfect fit!

moms toilet was tore up bought this it was very easy to put in back of tank and worked the first time

bathroom fixtures leaking

Toilet problems? Do not be afraid, for they. are ready to serve  -  and they service what you get -  fluidmasters product -  Do not be afraid and watch the tube videos on how and watch how you mas

Fluidmaster has your part - U-M-A-DIY'r!

Very easy to replace the unit. Adjusting to fix perfectly and set tank  water level is very easy to accomplish. Makes you look like a master plumber.  Great instructions.

Easy Fix.

We had  a water leak that was running in the bowl of the toilet and we used this product and it fixed the leak no more leaking toilet! Very happy customer!

No more running water

At first I was nervous it was going to fit. But I gave it a try because my toilet is a standard size and yeah it worked! Now I can just flush my toilet without it constantly running all day and all night. Also now my water bill won't be high anymore lol

Great

After using two low flow regulators which both leaked continuously, I bought this and installed it. leak stopped, at least for now. This is a very SLOW fill valve,  you can't flush twice without  waiting ten minutes for a refill. Installation is easy enough, simple tools and and about forty five minutes and done.

I have used Fluidmaster many times over the years. But this one does not fit quite right. It hits the tank lid even though I put it as low as possible without cutting the main tube.

Doesn't fit will.

Within the one month of installation , my water bill jumped because the valve never shut off after flushing.   The fill was so quiet I didn't immediately realize the water was still running.  Changed the flapper when I heard the toilet flush itself but found out that wasn't the problem.  So I wasted money with that.   With the constant shutting on and off of the water the stop valve sprang a leak and also had to be replaced.   All is well with a new but different style water fill valve.

Simple fix made bigger by defective part.