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Internet # 100023407

Model # 528

Store SKU # 414944

QuietFill Toilet Fill Valve

$8.66
  • New technology replaces old style fill valves and ballcocks
  • Fixes: running, noisy, slow refill and weak flushing toilets
  • Easy and quick installation
  • View More Details

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Product Details

About This Product

Designed to fix no/slow refilling, running, and noisy toilets, the Korky QuietFILL Toilet Fill Valve is quieter than other fill valves. It has a universal design to fit all brands and features a wide range of adjustability to fit most 2-piece and 1-piece toilets. The QuietFILL Fill Valve is very easy to install and adjust; no tools are required. Simply remove your old fill valve or ballcock, insert your new Korky fill valve, and adjust. The innovative twist-lock adjustment makes installation easy. Designed to fit more toilets, the QuietFILL toilet fill valve adjusts to fit both large and compact toilet tanks. Easy to install, the 528 includes: Toilet Fill Valve, Refill Tube and Clip, Tamper Proof Key and Instructions.

Highlights

  • Fixes: running, noisy, no/slow refill and no/weak flush toilets
  • Easy to install and adjust
  • Strainer catches sediment in the water and allows valve to be serviceable
  • Replaces fill valve models: 400, 400H, GP1138930, GP1083167, 7381125-400.0070A, 99-300, GA711048, 2206, 300A, 350A, and 375A
  • Innovative twist-lock adjustment for easy installation
  • Replaces old technologies such as ballcocks
  • Proven quietest in lab testing
  • Enclosed float does not hang-up on toilet tank walls
  • 5-year warranty
  • Includes: toilet fill valve, refill tube and clip, and instructions
  • 5-year warranty
  • Included in kit: 1-fill valve, 1-refill tube, 1-metal refill tube clip, 1-mounting nut, 1-cone washer, 1-coupling nut, 1 and 1-instructions
  • Return Policy

Product Information

Internet # 100023407

Model # 528

Store SKU # 414944

Additional Resources

Shop All Korky

Specifications

Dimensions: H 10 in, W 4 in, D 2 in

Dimensions

Product Depth (in.)

2 in

Product Height (in.)

10 in

Product Width (in.)

4 in

Details

Adjustable Fit

Yes

Color/Finish Family

Black

Features

No Additional Features

Included

Hardware Included

Material

Plastic

Pack Size

1

Plumbing Part Type

Toilet Fill Valve

Returnable

90-Day

Valve Type

Fill

Warranty / Certifications

Manufacturer Warranty

5 year warranty

Questions & Answers

Will this fit any toilet?
ByOct 11, 2025
1 Answer | 
Answer This Question

Thank you for contacting Korky. We do have further questions for you, so if you can contact us direct. 1800-528-3553

By|Oct 14, 2025


    The water in bowl after Korky installation is lower than before. The water level in the tank is already align with the overflow level (can't get any higher). Is there a way to make water level in bowl higher?
    ByAug 23, 2025
    1 Answer | 
    Answer This Question

    Thank you for contacting Korky. We do have further troubleshooting questions for you, so if you can contact us direct. 1800-528-3553

    By|Aug 25, 2025


      After flushing it takes a half minute to just start filling the tank. The korky quiet fill is only 6 months old and just started doing this 4 days ago.
      ByApr 11, 2024
      1 Answer | 
      Answer This Question

      Thank you for contacting Korky products. I do have further troubleshooting questions for you, so if you can contact us direct. 1800-528-3553 Thank you!

      By|Sep 23, 2024


        Will this fit American standard 41924
        ByMar 20, 2023
        1 Answer | 
        Answer This Question

        Let us help! Are you able to contact our Technical Support Team? We would like the opportunity to learn more and quickly identify what product is compatible with your toilet. Please call 1800-528-3553 or email sales@lavelle.com. We are available Monday through Friday 7:30AM to 5:00 PMS C

        By|Mar 22, 2023


          Korky valve very noisy; water leaks from top and splashes down when filling.
          ByJan 29, 2023
          2 Answers | 
          Answer This Question

          I have had the same issue with this product.  In addition to this it takes a long time to refill the tank after flushing

          By|Jan 31, 2023

            These are very quiet valves. The only reason they would leak or spray water out of the top is it has been damaged or there is sand clogging the shutoff.

            By|Dec 15, 2025

              (3)

              Just installed Korky silent fill valve 528MP and valve makes a lot of noise refilling tank. Valve height is proper and refill stops as correctly. How to I make refill quieter. This is unacceptable and surprising after positive reviews of this valve.
              ByFeb 12, 2022
              3 Answers | 
              Answer This Question

              We’re sorry your having trouble with your fill valve. Our Technical Support Team would like to learn more and quickly identify a solution. Please consider calling us at 262-763-2434 or email us at sales@lavelle.com. We are available Monday through Friday, 7:30 AM to 5:00 PM CST. Your toilet fill valve is backed by a 5-year warranty and we want to ensure your 100% satisfaction.

              By|Feb 14, 2022

                The one I ordered that the minimum height is 7 3/4 inches. The one I received that the minimum length is 8.4 inches. Very frustrated.

                By|Jun 30, 2022

                  I had a similar issue. What I did is adjust the water valve from the wall to the toilet to adjust the water speed and amount. Mine was too low. Once I increased the water speed/amount, the noise went away and it quickly filled.

                  By|Sep 12, 2026

                    (2)

                    It fills a little bit then pauses and makes some bubbling noises likes it's taking a breath, then fills another little bit and then repeats the same behavior about two or three more times before the tank fills and the valve shuts off.
                    BySep 29, 2020
                    2 Answers | 
                    Answer This Question

                    Fast delivery, works as advertised

                    By|Mar 30, 2024

                      (1)

                      Did you know that Korky valves are serviceable? We can show you how to take a few parts out and rinse them off to get your valve working like new again. Please call our Technical Support team at 800-528-3553 or email us at sales@lavelle.com. We are available Monday through Friday, 7:30 AM to 5:00 PM CST. This fill valve is backed by a 5 year warranty and we want to ensure your complete satisfaction.

                      By|Jun 24, 2024

                        (1)

                        Hi, can someone tell me how to adjust the water level in my tank with this fill valve? Does the 3 inch rule apply when installing it? Thanks
                        BySep 17, 2020
                        2 Answers | 
                        Answer This Question

                        While the tank is mostly empty, grab the top of the valve and twist counter-clockwise. This will unlock it so you can make your height adjustment. Pulling up will increase the water level. Pushing down will decrease the water level. Once you have things adjusted to your satisfaction, twist the top of the valve clockwise to lock it again. If you have further questions, please call our Technical Support team at 800-528-3553 or email us at sales@lavelle.com. We are available Monday through Friday, 7:30 AM to 5:00 PM CST.

                        By|Sep 12, 2026

                          (5)

                          The float is inside the top part. It moves up and down on the tube to set the "full" level shutoff. The tank may have a inscribed mark of the back to indicate fill level.

                          By|Dec 15, 2025

                          (1)

                          Viewing 1-8 of 24

                          Customer Reviews

                          4.1 out of 5

                          • 4.1 out of 391 reviews
                          • 73% recommend this product
                          Filter by:
                          Showing 1-10 of 391 reviews
                          Works great, Good item for the price, easy to install. Very fast delivery.
                          by
                          Non-stop flow ruined ceiling below toilet!
                          I installed 3 of these about 18 months ago when I replaced the flappers, upgrading from "old technology". They worked o.k. until the toilet upstairs emitted a sound of water flowing last week. The tank water level was at the overflow tube top, but the valve didn't shut off after the last flush. I flushed the toilet several times, the sound was gone, tank level o.k. This morning the ceiling below the toilet was ruined from water damage from non-stop valve flow upstairs.
                          by
                          Response from Korky Toilet GeniusNov 27, 2023
                          We apologize for this inconvenience. Are you able to contact our Technical Support team? Please call 262-763-2434 or email Sales@Lavelle.com. We are available Monday through Friday, 7:30Am to 5:00PM CST. Korky
                            2 found this review helpful
                            Messes up in 30 days or less
                            When I first installed the korky 528. I was happy I bought an American product. Literally 40 days later I keep hearing a small running sound. I would hit on the top of the korky, the sound would stop. After doing that for several months I said heck with this I will go buy something else. Having to take the lid off of the toilet was day I had it.
                            by
                            Response from Korky Toilet GeniusJan 4, 2023
                            Let us help! Are you able to contact our Technical Support team? We would love the opportunity to learn more and quickly identify a solution. Your toilet fill valve is backed by a 5 year warranty and we want to ensure your complete satisfaction. Please call 262-763-2434 or email Sales@Lavelle.com. We are available Monday through Friday, 7:30 AM to 5:00 PM CST. Korky
                              2 found this review helpful
                              Water in doesn't stop. Water keeps pouring in the tank quietly after reaching the water line. It ...
                              Water in doesn't stop. Water keeps pouring in the tank quietly after reaching the water line. It has quietly increased my water bill about 30% for months. Unable to fix.
                              by
                              Response from Korky Toilet GeniusFeb 18, 2019
                              We apologize for the inconvenience this has caused you. Are you able to contact our Customer Service team? We would love the opportunity to learn more and quickly identify a solution. Your fill valve is backed by a 5 year warranty and we want to ensure your 100% satisfaction. Please dial 1-800-528-3553 or email us at sales@lavelle.com. We are available Monday through Friday, 7:30 AM to 5:00 PM CST. Korky
                                4 found this review helpful
                                We use this as the autofill outlet in our swimming pool and it works perfectly.
                                We use this as the autofill outlet in our swimming pool and it works perfectly.
                                by
                                • Verified Purchase
                                • Recommended
                                5 found this review helpful
                                I have had several of these and will not have anymore. No matter the toilet in the house that I...
                                I have had several of these and will not have anymore. No matter the toilet in the house that I have put them in, they fail within a year or so and really never work completely satisfactorily even from the start. The unit in the photo is about to be replaced as it leaks through the valve - even after having fully disassembled, cleaned, serviced, and carefully reassembled it - constantly resulting in dripping, hissing, and outright howling/screaming when not in use. Running up my water bill nonetheless... It is hard to tell from the photo but the unit is COMPLETELY submerged and water is draining down the overflow pipe. The float in the unit moves freely; it just simply fails to shut the fill valve off. I'm done with Korky products and recommend others stay away from them. Avoid wasting your money and a lot of your time messing with something that is likely never going to work. At least that's been my experience with no less than 3 of their units. I'd be remiss not to share if I can help you save $ and time.
                                by
                                Response from Korky Toilet GeniusSep 15, 2017
                                We are sorry to hear your disappointment and apologize for the inconvenience the fill valves have caused you. Would you be willing to contact our customer service team? We would like to learn more about your toilet and help to quickly identify a solution. Your fill valves are backed by a 5 year warranty and shouldn't be failing in just one year. Please dial 1-800-528-3553 or email us at sales@lavelle.com. We are available Monday through Friday, 7:30 AM to 5:00 PM CST. We want to ensure your 100% satisfaction! Korky
                                  14 found this review helpful
                                  it is really quite and well manufactured! i will order...
                                  it is really quite and well manufactured! i will order another two for the my other bathrooms...
                                  by
                                  • Verified Purchase
                                  1 found this review helpful
                                  More compact, the float ball is in the assembly.
                                  Installing this flush valve took me ~ 20 minutes total. No special tools needed and all the parts were in the box. I'll need to admit that I 'cheated a bit' on the time estimate since I got my bucket, towel, sponge and channel lock pliers (just in case) ready to go for the project the night before. This installs just like any other flush valve I've replaced, more than 10 in the last 30 years. I'll offer some hints that may be of help: 1) You may need the channel lock pliers to shut off the water supply line. I've installed jacketed flexible supply line long ago, and I'd suggest you install one. This makes subsequent repairs much easier than a solid copper / plastic line... and they always line up! 2) Just in case you need to know, the nut holding the flush lever has left hand threads. Why, I don't know. 3) If you are replacing a similar fill valve pre-set the height and float valve on a table before installing it in the tank. This one has an index line to set the proper fill level. I also install the bowl fill tube and clip before installing it in the tank. Just easier that way. 4) Most tanks have a 'fill line' already indicated in the tank. Use it to set the water level if in doubt. 5) I'd also suggest replacing the 'flapper valve' at the same time. Since you have +90% of the effort done, the tank is empty and clean, another $5-$9 part is a worth it. It's quiet and quick filling.
                                  by
                                  • Recommended
                                  2 found this review helpful
                                  works as advertised
                                  The product was easily installed as the instructions are simple and they give you everything you need.
                                  by
                                  • DIY
                                  • Verified Purchase
                                  • Recommended
                                  1 found this review helpful
                                  Adjustable Height Fill Valve
                                  I have an old Case toilet that I refurbished. Case went out of business decades ago and parts are expensive. The tank is only 10 inches tall and I needed an adjustable valve. I 'Watney'd' the tank with my Dremel, installed this, and it works great.
                                  by
                                    • Recommended
                                    3 found this review helpful
                                    Showing 1-10 of 391 reviews

                                    Compare Key Features

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                                    Product Snapshot

                                    Ideal for fixing noisy or slow-filling toilets, with quiet operation and easy twist-lock installation. Perfect for DIYers.
                                    Ideal for homeowners looking for a quiet fill valve, making toilet repairs easier and more efficient.
                                    Ideal for water-conscious homeowners, this fill valve detects leaks, adjusts water levels, and cleans with every flush.
                                    Ideal for upgrades with quiet, powerful flushes, easy install, and water saving features. 7-year warranty included.

                                    Adjustable Height

                                    Anti-Siphon Protection

                                    Water Flow Rate

                                    Refills quickly
                                    2X greater bowl refill

                                    Water Efficiency

                                    Water-saving with adjustable refill level
                                    Adjustable tank and bowl water levels

                                    Material Quality

                                    Plastic
                                    Plastic
                                    Acrylonitrile Butadiene Styrene (ABS)
                                    Plastic