The product you chose is discontinued, but we found something similar you might like.
Duo Flush System Toilet Converter
  • Fluidmaster
  • Model 550DFRK-3
  • Internet #204667552
  • Store SO SKU #1000028233

Duo Flush System Toilet Converter

$2498 /each
Discontinued Model:

Model # 550DFRK-1

Internet #203682806

Fluidmaster Duo Flush System

Discontinued Fluidmaster

Duo Flush System

Frequently Bought Together

Product Overview

The Fluidmaster Duo Flush System allows you to quickly convert your existing toilet into a Dual Flush toilet. Duo Flush enables you to use less water by offering two different flush settings, one for liquids and one for solids, and with Duo Flush technology you save water without sacrificing flush performance. Duo Flush replaces the toilet flapper, thus eliminating potential leaks in the future. The DUO FLUSH System also comes with PerforMAX Fill Valve to maximize your toilet performance and water savings. The PerforMAX Fill Valve is the quietest and most powerful fill valve sold.

  • Made of durable corrosion resistant materials
  • Use up to 45% less water
  • Fits more toilets than any other dual flush conversion valve
  • Easy adjust top mounted dials allow for easy water level adjustment and eliminate the need to remove the valve while making adjustments
  • Fits most toilets with a 2 in. flush valve (not compatible with Mansfield or toilets with 3 in. flush valves)
  • Installs in less than 10 minutes with snap-on swivel mount for tool free installation with no tank removal
  • Includes chrome dual action tank lever and all necessary hardware




Warranty / Certifications

More Products With These Features


Customer Questions & Answers


Is this a universal item. Will it fit all toilets?
Asked by: flaco
It comes with various adaptors to fit most toilets. But it does not WORK universally, despite fitting. See my review.
Answered by: NotSavingWater
Date published: 2015-09-21

Is the Fluidmaster Duo Flush System in stock at my local Home Depot ?

Asked by: Anonymous
I would say that it is most likely, as it is in my area, it's in stock at all of them or at lease normally stocked. Within 25 miles.
Answered by: Retired297
Date published: 2015-11-07

Does the flush handle come in bronze color?

I have only seen chrome colored flush handles, do they come in bronze as this better matches my decor?
Asked by: Picky
Unfortunately, no. That was my initial hesitation, since we have all custom hardware in our bathrooms. Still, it is a clean appearing handle if it doesn't clash too severely. I contacted the company and they indicated that they don't currently offer any options. (Not holding my breath, but if enough people raise the issue, maybe they will consider answering the call.) No shame in being picky! Hey, I'm also picky too or I wouldn't have spent bucks for custom hardware in the first place.
Answered by: Dave
Date published: 2016-04-07


I have installed this item and used it for a couple of years. The cable has broken where it attaches inside the flushing mechanism. I see a statement of a five year warranty, how do I get a replacement?
Asked by: wrs44
I cannot answer this call the makers
Answered by: Toptheo
Date published: 2016-07-16
  • y_2017, m_6, d_21, h_1CST
  • bvseo_bulk, prod_bvqa, vn_bulk_1.0.0-hotfix-1
  • cp_1, bvpage1
  • co_hasquestionsanswers, tq_9
  • loc_, sid_203682806, prod, sort_[SortEntry(order=NUM_ANSWERS, direction=DESCENDING), SortEntry(order=SUBMISSION_TIME, direction=DESCENDING), SortEntry(order=LAST_APPROVED_ANSWER_SUBMISSION_TIME, direction=DESCENDING), SortEntry(order=LAST_APPROVED_ANSWER_SUBMISSION_TIME, direction=DESCENDING), SortEntry(order=BEST_ANSWER_FEEDBACK_COUNT, direction=DESCENDING), SortEntry(order=POSITIVE_ANSWER_FEEDBACK_COUNT, direction=DESCENDING), SortEntry(order=NUM_ANSWERS, direction=DESCENDING)]
  • clientName_homedepot
  • bvseo_sdk, java_sdk, bvseo-3.1.1
  • CLOUD, getContent, 25ms

Customer Reviews

Duo Flush System is rated 2.6 out of 5 by 91.
Rated 4 out of 5 by from Wonderful Idea I like the concept of saving water. The option of flushing for liquid waste using about half the water opposed to solid waste. Is a good idea. The instructions on how to install the flapper modification was difficult to understand initially. May have just been me, but the install was easy other than that. The cost is more than a conventional float system, but the environmental impact is with the cost for me. Not sure I'll save money because I don't think my water company reads my meter. Setting the system for the amount of water you need to flush was easy and effective.
Date published: 2017-06-10
Rated 5 out of 5 by from Great change from previous versions, perfect refit kit I've used a number of these kits in the past, each of them required the full dissasembly of the toilet to replace the connection of the bowl to the tank in order to work. Instead, this came with a clip and seal that attaches to the old flap base, and the new flush mechanism clips to that. I'm a bit worried that the seal will degrade causing the toilet to run / flush constantly, but there's no actual sign of that yet.
Date published: 2017-06-09
Rated 4 out of 5 by from Easy to use flush conversion system This product idea is a very good idea. I think it is not widely known. We put this in the main bathroom because we wanted to use it. However we constantly found ourselves telling people how to use it. Which can be a little awkward. I would recommend putting this in a personal bathroom. That being said it was relatively easy to install. Once installed it works very well. As a result I would recommend this product.
Date published: 2017-06-09
Rated 4 out of 5 by from Very innovative product It is a very nice plug and play unit. Comes with a extra mount on the fill valve to accommodate most toilets. It has plenty of flushing power in both modes. It is adjustable but I didn"t have to change the settings at which they were set at out of the box. I would definitely recommend to others . Hopefully it saves as much water as estimated.
Date published: 2017-06-09
Rated 5 out of 5 by from Saves me money It's amazing! I got a complete set and easy to install. Instructions are there. Very functional product and must buy. It could save money and water. It was really worth it!
Date published: 2017-06-08
Rated 4 out of 5 by from It's ok We put the dual flush in our bathroom on the main floor. Where it will get used the most. The idea is good, but it doesn't flush the best. We are going to keep using it.
Date published: 2017-06-14
Rated 5 out of 5 by from Fast and easy way to save some $$ on water This is a neat new invention that is a great way to save water in the bathroom. Its easy to install. Does not take up a lot of space.
Date published: 2017-06-05
Rated 5 out of 5 by from Great Products This is a very good way to conserve water usage with this dual flush system is eco friendly and money saving
Date published: 2017-06-09
  • y_2017, m_6, d_21, h_3
  • bvseo_bulk, prod_bvrr, vn_bulk_1.0.0-hotfix-1
  • cp_1, bvpage1
  • co_hasreviews, tv_0, tr_91
  • loc_, sid_203682806, prod, sort_[SortEntry(order=RELEVANCE, direction=DESCENDING)]
  • clientName_homedepot
  • bvseo_sdk, java_sdk, bvseo-3.1.1
  • CLOUD, getContent, 14ms