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FLT231 HydroStop® Toilet Tank Flapperless Alternative

The HydroStop® replaces flimsy rubber flappers with a sturdy tower, it is engineered to eliminate the most common toilet problems. Unlike the angled, floating close of a flapper, the HydroStop® drops vertically and solidly onto the flush valve opening to create a better seal and eliminate the possibility of leaks. The EPA estimates that 20% of all toilets leak up to 200 gallons of water a day, mostly because of faulty flappers. While ordinary flappers are connected to the handle with a thin chain that is subject to improper tension tangles and breakage, the HydroStop® features a durable stainless steel cable that is stronger, lasts longer and is less likely to break. The HydroStop® also features patented S.T.O.P. Technology (Safe Toilet Overflow Protection) that helps prevent bowl overflows. In the event of a clog, lifting up on the handle immediately drops the HydroStop® tower and closes the flush valve so that water does not continue to drain from the tank into the bowl.

Model # FLT231T
Plumber Pick Water Saving
3 out of 5 based on 14 customer ratings
14 customer reviews Write a review

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Product Description

The HydroStop® replaces flimsy rubber flappers with a sturdy tower, it is engineered to eliminate the most common toilet problems. Unlike the angled, floating close of a flapper, the HydroStop® drops vertically and solidly onto the flush valve opening to create a better seal and eliminate the possibility of leaks. The EPA estimates that 20% of all toilets leak up to 200 gallons of water a day, mostly because of faulty flappers. While ordinary flappers are connected to the handle with a thin chain that is subject to improper tension tangles and breakage, the HydroStop® features a durable stainless steel cable that is stronger, lasts longer and is less likely to break. The HydroStop® also features patented S.T.O.P. Technology (Safe Toilet Overflow Protection) that helps prevent bowl overflows. In the event of a clog, lifting up on the handle immediately drops the HydroStop® tower and closes the flush valve so that water does not continue to drain from the tank into the bowl.

  • Handle activates spring loaded S.T.O.P. Technology to immediately prevent overflows
  • Eliminates the guesswork about buying the right type and size of flapper
  • Permafit silicone seal is chemical resistant and will not warp
  • Drop-in installation with no tools or tank removal needed
  • Lighttouch™ Handle allows for an easier flush
  • Fits standard 2″ to 2-1/2″ flush valves

Specifications

  • PKG Height (in.)8.19
  • PKG Width (in.)3.54
  • PKG Length (in.)5.51
  • PKG Weight (lb.)0.74
  • OEM BrandUniversal
  • Product Height(in).7.75
  • Product Width(in).3.15
  • Product Length(in).3.15
  • MaterialPlastic
  • Product TypeFlapper

How to video

  View Instructions FLT231T Download Instructions

14 reviews for FLT231 HydroStop® Toilet Tank Flapperless Alternative

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  1. 4 out of 5

    Very easy to install and really works great. I have them installed in two bathrooms and would like to install in additional ones. However, I also have had problems with the handle breaking. I had one break last month and was forced to purchase a whole new Hydrostop kit. Now, j...Read More

    • Danco

      Good Morning Gary,
      The issue was resolved about a year ago. We’ve reinforced both the shaft inside the handle and the tip of the handle that goes into the control box. Unfortunately, there are still some of the older models out there. We would be happy to send out a re...Read More

  2. 4 out of 5

    I feel basically the same as other reviewers. Handles breaking has been main issue. Where and when is this going to be resolved?

    • Danco

      Good Afternoon Rob,
      The issue was resolved about a year ago. We’ve reinforced both the shaft inside the handle and the tip of the handle that goes into the control box. Unfortunately, there are still some of the older models out there. We would be happy to send out...Read More

  3. 1 out of 5

    After I installed this product, I noticed a leak indicating that the gasket was not sealing properly. I have uninstalled and reinstalled the FLT231 several times, paying careful attention to the instructions, but I am still unable to get a secure fit. I decided to reinstall my...Read More

    • Danco

      Good Afternoon Rich,
      I am sorry to hear about the inconvenience you are having regarding the FLT231. An unsuccessful DIY installation can be frustrating. Our excellent Product Support team is just a phone call away and they would love to provide some troubleshooting tips...Read More

  4. 1 out of 5

    I replaced all of the valves on all 3 toilets in the house. They worked flawlessly until about the 8 month mark when all of the handles started breaking. I have had to replace all three and had to purchase the entire kit just to get the handle. Contacted customer service who s...Read More

    • Danco

      Good Afternoon Steven,
      We are sorry to hear about this experience you had. I have passed along your concern to our Senior Product Support Member and they should be in contact with you soon. We would be happy to send you replacement handles. We understand your reluctance ...Read More

  5. 5 out of 5

    I’m rating the customer service and the engineering upgrades. The fact that Danco has recognized and addressed the undersized stem issue of the handle on the HydroStop FLT231 system is top notch as compared to most companies these days. The handle stem was the weak l...Read More

  6. 3 out of 5

    System works great, just wish you could order just the gasket and not the entire Flapperless Flush System. I am stockpiling a bunch of spare parts.

    • Danco

      Good Morning Tom,
      Thank you for your feedback. We are happy to hear about your satisfaction with the FLT231. We understand your frustration regarding needing one part this available as a stand alone and therefore having to buy the product all over again. We will share yo...Read More

  7. 1 out of 5

    It doesn’t fit TOTO one Piece toilets

    • Danco

      Good Afternoon Norman,
      Most TOTO toilets have 3″ flush valves, which are larger than the standard 2″ to 2-1/2″ flush valves that the FLT231 fits. There are always exceptions when it comes to universal products and unfortunately your toilet just happens to be one of...Read More

  8. 3 out of 5

    I’m very satisfied with this product .
    Used it for many years .
    Only problem is the handle. This is the 3rd handle that broke and no replacement part available .
    I ended up buying whole new sets just for the handle .
    Now I have 2 unused flus...Read More

    • Danco

      Good Afternoon Bernard,
      Unfortunately, we do not sell a single handle replacement (we once did at retail). I will pass on your concern to our Engineering Team so that they can be aware of the issue you experienced and push for a replacement handle to get back on the shel...Read More

  9. 5 out of 5

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  10. 5 out of 5

    Works very well, easy to install, just a pair of pliers needed. I have 2 so far in my house and going to do one more,every thing works smooth and a FULL flush without having to stand and hold the handle down, one push does the job.

  11. 3 out of 5

    Easy to install. Works great, I have installed in both bathrooms. I have also had the handle break twice and cannot find the handle by itself.

    • Danco

      Good Morning Marc,
      Thank you for letting us know about the experience you have had with the FLT231T. We apologize for the inconvenience you have experienced regarding the handles on the HydroStop Toilet Tank Flapperless Alternative. We have recently made improvements to ...Read More

  12. 4 out of 5

    Have had your product in one toilet for several years. It recently started leaking. Found I could not buy a gasket had to buy a whole new installation. We have lots of chemicals in our water so suspect that caused the seal to fail. I see on the new set box that the silicon...Read More

  13. 1 out of 5

    Easy installation and the product works well, but the handle is of cheap design (plastic) and will break within the year. I have replaced both toilets with this product and I have replaced both handles within a year. The price of the whole product is so cheap that you will end...Read More

    • Danco

      Good Morning Brad,
      Unfortunately, we do not sell a single handle replacement (we once did at retail). I will pass on your concern to our Engineering Team so that they can be aware of the issue you experienced and push for a replacement handle to get back on the shelves. ...Read More

  14. 2 out of 5

    Works great! Until the handle breaks. Unable to find replacement handles. Good design ruined by poor construction

    • Danco

      Good Morning Warren,
      Thank you for your feedback and letting us know of the situation you had. We will pass it along to our engineering team so that they can look at the problem. If you have anymore question or concerns about the FLT231 we have an excellent technical sup...Read More

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