Fluidmaster Duo Flush Valve-550DFRP6 - The Home Depot
Message to Our Customers


Model # 550DFRP6

Internet # 203145071

Store SKU # 742478

Duo Flush Valve

Fluidmaster Duo Flush Valve

This item has been discontinued.
The Home Depot no longer carries this specific product.

$21.98 / each


Model # 550DFRP6

Internet # 203145071

Store SKU # 742478

The Fluidmaster Duo Flush Valve 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.

  • 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, 3 in. flush valves, or toilets with ballcock fill 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

Info & Guides

You will need Adobe® Acrobat® Reader to view PDF documents. Download a free copy from the Adobe Web site.


Product Depth (in.) 
Product Height (in.) 
Product Width (in.) 
Adjustable Fit 
Yes-fits standard 2" flush valves (standard, angle seat, and brass) 
Dual Flush 
Hardware Included 
Includes Flapper 
Plumbing Part Type 
Toilet Flush & Fill Valve 
Valve Type 
Warranty / Certifications
Manufacturer Warranty 
5 year 


Rated 1.6 out of 5 by 20 reviewers.
Rated 1.0 out of 5.0 by BROKE after months only! Cheap, flimsy, plastic Only months ago my friend installed this as a gift. I had an old heavy duty thing before which worked just fine. This is junk. Cheap plastic. Stopped operating effectively after a few months only. Then...very thin chain that looks like jewelry beading wire snapped & completely broke. I'm without toilet. Spent hours trying to snap this thing out to see what's going on & whether I could at least do a quick fix so I have a working toilet. So now..... totally broken, can't use toilet at all, only one in the house. What to do now????? As it was a gift I have no receipt, however I will still contacting the company very shortly. This is unacceptable given I had a perfectly working toilet for years before this install. Inconvenienced! March 26, 2015
Rated 4.0 out of 5.0 by My first one broke, and they promptly Fedexed me a replacement. My first one broke, and FluidMaster Fedexed me a replacement. Very impressed with the service and followup. It is currently working the way you expect it to work. It is actually working quite nicely. Keeping my fingers crossed that it will keep working. With this kind of service behind the product, I guess I might even get a couple of more and update all my flush valve's in the house. May 21, 2015
Rated 4.0 out of 5.0 by Awesome design, OK Quality The design is great. Unique adjustment on top allows "tuning" of your flush. It is super easy to install, but you must actually pay attention to the instructions. Fortuantley, the instructions are pretty clear and straightforward. Quality is just OK (cheaper plastic parts), but just glad I didn't have to take the toilet tank off for the retro-fit! Last time I did that with other products, could not find the right gasket to replace the one that was old and cracked. This no-tank-removal design elimantes that issue...nice! April 4, 2012
Rated 1.0 out of 5.0 by poorly designed and does not perform as promised and does not last My son purchased and installed the duo flush system about a year ago as a money saving gift. The system frequently leaks after flushing and yesterday the cable attached to the handle broke Inside the flush valve. I went to Home Dept and Loews...no parties . I had to purchase the entire duo flush kit to replace the flush valve. No parts because folks are replacing this failed system with the tried and true and simple less costly systems. The kit cost $30 +. I have read the many complaints from customers and fluid masters apologies and response. WHY is the problem Not remedied? Poor QC and CS. December 5, 2014
Rated 1.0 out of 5.0 by Poor Handle Design Prevents Consistent Performance The valve itself does save water and is a good idea. However, the handle design cannot withstand repeated use. Cheap, small diameter plastic gearing, thin gage actuation wire inside the mechanism and an inadequate locknut make handle performance unacceptable. Guests often push the handle with the force of a traditional toilet valve. The handle cannot withstand these forces. August 12, 2012
Rated 1.0 out of 5.0 by Don't waste your money Install was easy and straight forward and it worked for few months. Then it started constantly filling unless you juggled the handle. Next it stopped flushing. The issue here is there is a tiny cable from the handle to the flush unit. That comes loose or breaks which means you can't flush anymore. The cable is about as thin as a piece of thread, not a very good design for longevity. December 31, 2014
Rated 1.0 out of 5.0 by Do not buy. May work at first but fails later and costs you LOTS in water bills At first the duo flush will work great. I installed four. But then after some time the cable from handle will not work properly leaving the flush valve in the wide open position. I did not discover the issue until after turning off my irrigation system for the winter. My normal non irrigation months water bill is $65. My last two months October and November have been $164 and $241. Fluid master fully acknowledges the issue and will send tradional flapper replacements, new arm and handle free of charge no receipts required. HOWEVER the flapper replacement they sent is now causing the dreading slow leak refill every 8 to 10 minutes. I will be calling them back. Their explanation is that in certain applications (hard water) the minerals cause the cable to eventually stick. Well Ive lived in Kentucky, Georgia, Illinois, and now Tennessee and I've had some level of hard water in all those places. December 5, 2014
Rated 4.0 out of 5.0 by It Works Well Installs real easy, I had a leak at first between my angled valve seat and the supplied adaptor, but resolved it by pushing the adaptor on tighter. It would be better to simply replace the angled seat with a level one but I didn't want to take the tank off, but doing so would eliminate a potential leak point. I was able to get my 3.5 gallon flush down to 2.10 for full flush and 1.25 gallons for the light flush. Fluidmaster should upgrade the kit to a metal flush handle though, the plastic one is cheesy. I am going to buy another one for my other toilet. July 2, 2012
  • 2015-05-27T11:05:53.179-05:00
  • bvseo_lps, prod_bvrr, vn_prr_5.6
  • cp-1, bvpage1
  • co_hasreviews, tv_20, tr_20
  • loc_en_US, sid_203145071, prod, sort_default
2 >>


Store Exclusive. This item is available for purchase in select stores only.