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Internet # 100580550

Model # 242

Store SKU # 147982

Replacement Toilet Fill Valve Seal for 400A Fill Valves

$3.48
  • Restore the performance of your toilet fill valve
  • Easy to install DIY replacement toilet fill valve seal
  • Built durable with a 1 year warranty
  • View More Details

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Return this item within 90 days of purchase.

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Product Details

About This Product

The Fluidmaster 242 Replacement Seal for model 400A, 200 and 747 Fill Valves is a quick and easy way to restore your toilet fill valves performance. A direct replacement seal which fits the universal Fluidmaster 400A toilet fill valve, the No. 1 selling toilet fill valve worldwide, and other 200 valves and 747 valves. This replacement toilet part offers an easy way to solve common toilet fill problems. Use this design to extend the life of an otherwise effective fill valve. Built with quality in mind this design comes with a 1 year warranty. The Fluidmaster Toilet Fill Valve Seal and simple DIY solution to common toilet fill problems.

Highlights

  • Extend the lifespan of your Fluidmaster toilet fill valve
  • Easy to install, quick and simple DIY replacement part
  • Direct replacement seal for the universal design 400A fill valve, 200 fill valve models and 747 fill valve models
  • Built to last from high quality rubber
  • Fix a broken toilet valve seal without purchasing another fill valve
  • 1 year warranty
  • Return Policy
  • California residents
     see Prop 65 WARNINGS

Product Information

Internet # 100580550

Model # 242

Store SKU # 147982

Additional Resources

Shop All Fluidmaster
DIY Projects & Ideas

Specifications

Dimensions

Outside Diameter (in.)

.5 in

Product Width (in.)

3.75 in

Details

Color/Finish Family

Black

Features

Chemical Resistant

Material

Plastic

Pack Size

1

Plumbing Part Type

Toilet Flush & Fill Valve

Returnable

90-Day

Seal Type

Fill Valve Seals

Warranty / Certifications

Manufacturer Warranty

1 Year

Questions & Answers

does this part fit valve actuating unit
ByAug 3, 2026
1 Answer | 
Answer This Question

Based on the limited information provided we are unable to determine whether this product will fit your specific device. More information is required. For additional information or help with your product contact Fluidmaster’s Technical Service Department as we are available Monday through Friday from 5:30 AM through 5:00 PM Pacific Standard Time. Contact options include: Chat www.fluidmaster.com/support E-Mail techsupport@fluidmaster.com and Toll Free 800-631-2011.

By|Aug 5, 2026


    does it fit Glacier Bay model n2450e fill valve
    ByJul 22, 2026
    1 Answer | 
    Answer This Question

    If the fill valve that's installed in this Glacier Bay toilet is a Fluidmaster 400 series then yes it will fit. For additional information or help with your product contact Fluidmaster’s Technical Service Department as we are available Monday through Friday from 5:30 AM through 5:00 PM Pacific Standard Time. Contact options include: Chat www.fluidmaster.com/support E-Mail techsupport@fluidmaster.com and Toll Free 800-631-2011.

    By|Jul 24, 2026


      Does this fit a model 300
      ByJul 20, 2026
      1 Answer | 
      Answer This Question

      If you are referring to the Fluidmaster model 300 then no. The 300 does not have replacement parts. For additional information or help with your product contact Fluidmaster’s Technical Service Department as we are available Monday through Friday from 5:30 AM through 5:00 PM Pacific Standard Time. Contact options include: Chat www.fluidmaster.com/support E-Mail techsupport@fluidmaster.com and Toll Free 800-631-2011.

      By|Jul 23, 2026


        Will this valve work on an American Standard Toilet?
        ByJul 8, 2026
        1 Answer | 
        Answer This Question

        Based on the limited information provided we are unable to confirm. More details are required. For additional information or help with your product contact Fluidmaster’s Technical Service Department as we are available Monday through Friday from 5:30 AM through 5:00 PM Pacific Standard Time. Contact options include: Chat www.fluidmaster.com/support E-Mail techsupport@fluidmaster.com and Toll Free 800-631-2011.

        By|Jul 10, 2026


          Will this replace the seal on a Kohler Class Five fill valve? Fill valve cap is red with the number 1033131 and Kohler Class Five stamped on it. The float is stamped Fluidmaster. Thanks!
          ByMay 29, 2026
          1 Answer | 
          Answer This Question

          Yes it will. For additional information or help with your product contact Fluidmaster’s Technical Service Department as we are available Monday through Friday from 5:30 AM through 5:00 PM Pacific Standard Time. Contact options include: Chat www.fluidmaster.com/support E-Mail techsupport@fluidmaster.com and Toll Free 800-631-2011.

          By|Jun 1, 2026


            Does this seal a replacement for the seal in a korky fill valve?
            ByMay 22, 2026
            1 Answer | 
            Answer This Question

            . For additional information or help with your product contact Fluidmaster’s Technical Service Department as we are available Monday through Friday from 5:30 AM through 5:00 PM Pacific Standard Time. Contact options include: Chat www.fluidmaster.com/support E-Mail techsupport@fluidmaster.com and Toll Free 800-631-2011.

            By|May 26, 2026


              Will it fit with the Fluidmaster 300?
              ByJan 12, 2026
              1 Answer | 
              Answer This Question

              The 300 does not have any replaceable parts as it's a starter valve and not available for retail. If you are having issues we recommend to clean the original seal and add a lubricant like a plumbers grease or silicone spray to help it out. If that still doesn't help then we recommend to replace the valve altogether with the 400 series. For more informatio you can reach at our email techsupport@fluidmaster.com, chat service at fluidmaster.com, or call us direct at 800-631-2011. We are open from Monday - Friday 5:30am - 5pm pacific.

              By|Mar 8, 2026


                Does this Fluidmaster replacement seal also fit the Toto universal fill valve
                ByNov 15, 2025
                1 Answer | 
                Answer This Question

                No it does not. For additional information or help with your product contact Fluidmaster’s Technical Service Department as we are available Monday through Friday from 5:30 AM through 5:00 PM Pacific Standard Time. Contact options include: Chat www.fluidmaster.com/support E-Mail techsupport@fluidmaster.com and Toll Free 800-631-2011.

                By|Nov 17, 2025


                  Viewing 1-8 of 67

                  Customer Reviews

                  4.7 out of 5

                  • 4.7 out of 882 reviews
                  • 91% recommend this product
                  Filter by:
                  Showing 1-10 of 882 reviews
                  It didn't stop the squeak. I had cleaned before, but also squirted silicone after 2nd cleaning. Tried other brands and fancier models but find these very good and great value.
                  by
                  Amazing What a Difference a Little Piece of Rubber Can Make, Rather Than Replacing The Whole Valve Assembly. Came Free Delivery Next Evening, Less Than $5 Total “Out The Door”… ??? #GotToilet? ?? ? #WhenYaGottaGo… ?
                  by
                  This customer chose to rate the product and not provide text.
                  by
                  Hydroclean HC630 seal replacement
                  Works perfectly on Hydroclean HC630.
                  by
                    2 found this review helpful
                    It fits
                    Perfect fits for my fill valve fluidmaster 400 I replaced it in 30 sec! Wow! Photo is my old broken diaphragm.
                    by
                      • Recommended
                      Functions perfectly in the FluidMaster 703a series fill valve in my Glacier Bay toilet. Sadly, th...
                      Functions perfectly in the FluidMaster 703a series fill valve in my Glacier Bay toilet. Sadly, the rubber doesn't do well with my water, so I have to replace it every year or so. Luckily, it's a lot cheaper than replacing the whole fill valve. I tried coating it in silicone grease, hopefully it helps it last a little longer.
                      by
                        • Recommended
                        5 found this review helpful
                        Easy to install and it works... doesn't get any better than that!
                        by
                        • Verified Purchase
                        This customer chose to rate the product and not provide text.
                        by
                        • Verified Purchase
                        Good I love Home Depot never a problem
                        by
                        • Verified Purchase
                        This seal is Thinner than Original. Held side by side there is No drought. Would not seal. Still looking for correct thickness. Probably will have to buy complete unit now.
                        by
                        Response from FluidmasterSupportAug 5, 2026
                        This seal only works for Fluidmaster products. If the seals looked different in size it's because the used one has bloated due to the water affecting it. For additional information or help with your product contact Fluidmaster’s Technical Service Department as we are available Monday through Friday from 5:30 AM through 5:00 PM Pacific Standard Time. Contact options include: Chat www.fluidmaster.com/support E-Mail techsupport@fluidmaster.com and Toll Free 800-631-2011. FluidMaster
                        • Verified Purchase
                        Showing 1-10 of 882 reviews

                        Compare Key Features

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                        Product Snapshot

                        Ideal for customers who want to easily restore toilet fill valve performance with a 1-year warranty.
                        Ideal for earthquake-prone areas, ensuring a water-tight seal for faucets and toilets with easy installation.
                        Ideal for homeowners looking for a durable, chemical-resistant toilet seal, ensuring a leak-free and long-lasting repair.
                        Ideal for Champion 4 and Titan 4 toilets, ensuring a leak-free seal with durable silicone, lasting 10x longer.

                        Compatibility with multiple toilet brands/models

                        Fluidmaster 400A fill valve
                        Faucet and toilet riser installations
                        American Standard Champion 3, Kohler Class Five, and Kohler Class Six toilets
                        American Standard Champion 4 and Eljer Titan 4

                        Dimension/Size

                        3.75 in. W x 0.5 in. D
                        0.42 in ID, 0.63 in OD, 0.33 in D, 0.63 in H, 0.63 in W
                        3 in diameter
                        2.75 in. Dia (Inner), 4.3 in. Dia (Outer), 0.19 in. W, 7.32 in. D, 5.98 in. H

                        Chemical resistance

                        Chlorine and hard water resistant

                        Water-tight seal

                        Anti-microbial properties