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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
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Customer Reviews

Duo Flush System is rated 2.5 out of 5 by 83.
Rated 1 out of 5 by from weak flush cable connection fails within three years or sooner. I loved the idea of saving water, however i would expect the product to survive the warranty period. a weak connection from the flush handle to the apparatus fails. I have three toilets, had the system installed on two, had the first one fail, used the remaining one, only to have the second one fail. They say using bleach will void the warranty. No bleach used and still a failure. Buy the DUO Flush system and you will be better off. if i could i would not have given any stars!
Date published: 2015-12-09
Rated 1 out of 5 by from Let me down twice. I have now had two of these flush valves fail on me. Between the two I don't think I have had three years of service. Both times same failure. The connection between the the handle and the valve broke. When I have tried to call for warranty support both times they were not there during their published hours. Lousy product and worse service.
Date published: 2015-12-31
Rated 2 out of 5 by from Piece of junk. Wish I'd read these reviews before I purchased this loser. Same as all of the rest, my connection cable broke. I've spent enough time trying to fix it since it never really functioned properly in the first place. It's a nice thought to try and conserve water but this piece of junk isn't the answer.
Date published: 2016-01-12
Rated 1 out of 5 by from Cheaply Built, Hard to Install, Breaks within 12 months I put one of these in and really liked it. When a second toilet started leaking I put a second one in. Within 12 months both have broken. The wire from the flush handle to the valve breaks and the toilet won't flush. I had to take the whole bowl off to install the valve seat. Now I have to do it all again to replace these 2. This is a total waste of money.
Date published: 2015-12-29
Rated 2 out of 5 by from Lasted about 6months somethingTitle says it all. It started to not flush and fill properly over time. The toilet started to constantly run until one day the handle just broke as I went to flush. Definitely not going to replace it with another... Going with something else that is a bit more worth the money
Date published: 2016-01-09
Rated 1 out of 5 by from Don't waste your money on this piece of junk Don't waste your money. I installed this a year ago to try to cut down on water usage. The cable connecting the handle to the 'flush unit' broke and you can't find any replacement parts at the store. The employees at Home Depot will just shrug and tell you to contact the manufacturer. They don't cary parts and don't know how to fix these.
Date published: 2016-01-30
Rated 1 out of 5 by from Water bill without lawn watering came in. There was never a cure for the ghost flushing. After going through over and over checking that it was properly installed, I gave up and left it alone just to see if there was really a water loss. Now that the lawn watering season is over, I'd estimate approximate one hundred dollar water loss in a month of use. I know that out of two of the duo flush units I tried, they both had the same problem with the unit not entirely sealing over the flush valve. I even installed a new Fluidmaster flush valve to see if it would work with a valve that was manufactored by the same company. This product is hopeless and deserves a refund and a apology to consumers that have wasted so much money and time trying to get something like this to work.
Date published: 2015-11-27
Rated 1 out of 5 by from Cheap flush cable connection Brought 2 of these for both home toilets. Both failed within 12 months due to cheap and poorly design flush cable broke at either end.
Date published: 2016-01-01
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