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The Fluidmaster PRO550UK is a versatile, easy-to-install dual flush valve designed to fit both 1½" and 2" flush outlets. Featuring adjustable flush volumes and a flexible button mount (top, side, or front), it offers customizable water savings and overflow control. Crafted from durable brass and backed by a 4.6-star rating from over 1,400 users, it’s the smart upgrade for efficient, leak-free toilet performance.





| ASIN | B0060X5Q0A |
| Batteries Required? | No |
| Batteries included? | No |
| Best Sellers Rank | 28,090 in DIY & Tools ( See Top 100 in DIY & Tools ) 22 in Tap Valves |
| Certification | CE |
| Colour | White |
| Customer Reviews | 4.6 4.6 out of 5 stars (1,411) |
| Date First Available | 29 Oct. 2011 |
| Item Package Quantity | 1 |
| Item Weight | 299 g |
| Item model number | 550073 |
| Manufacturer | fluidmaster |
| Material | Brass |
| Number of Pieces | 1 |
| Part Number | 550073 |
| Product Dimensions | 29 x 15 x 10 cm; 299.37 g |
| Shape | Rectangular |
| Size | 5.9 inches x 11.4 inches x 3.9 inches |
| Style | Manual |
B**L
Easy to fit and a great price
Absolutely brilliant. Toilet started running constantly after every flush. Bought this as it was a direct replacement for the one I’d had installed for the last 5 years or so. Turn off water, flush the toilet. Unscrew the flush from inside the toilet and fit in reverse the new flush. Tighten screw for inlet pipe and job done. Now flushes perfectly and no more running after a flush. Probably took about 30 mins but that’s because I had to fiddle about undoing a stuck inlet nut and washer.
R**Y
Worked well
Fitted and worked easy
C**L
Having never done a job like this before I thought a review of the product ...
Amazon yet again have delivered, I received these on the same day as I ordered, delivery was by prime and as always very efficient. To the product: - Reason for purchase – When attempting to fix our toilet system after the flush had broken, the float also broke. So basically a new system was needed. Having never done a job like this before I thought a review of the product and how hard it was to do it was in order. The products comes in a retail box. It comes in a hassle free packaging so there's no need for scissors. It contains: - 1 x Dual flush system 1 x Dual button 1 x Large Spacer for button 1 x Rubber Gasket The product feels great, it a mini version of what I've seen before which is ideal as it needed to fit in the downstairs toilet where its a mini toilet. It fits in perfectly. Installation was much easier than I expected. Step 1 - Turn off the water to the toilet Step 2 - Empty the toilet system Step 3 - Undo the screws holding the toilet system to the toilet so you can get to the bottom of the system Step 4 - Unscrew the nut at the base of the toilet system that holds the flush to the toilet. Step 5 - Remove the old flush Step 6 - Repeat the above steps in the reverse order to assemble. Step 12 - Add the button to the toilet lid, using the space if required Step 13 - Click the cable into the button The device gives you the choice of how much is a short flush and how much is a large flush. I went for a 25% for short flush as thats enough for a number 1 It was maybe the simplest bit of DIY that looked daughting but it was easy. Even if you went wrong, you just turn off the water. All in all, a great product. *If you have any questions, then click my profile and drop me a message and I will be happy to help you. To understand my star rating please see my profile. *
N**R
Easy install and works perfectly
The lever operated flush mechanism on the cistern in one of our toilets failed. I replaced it with a modern lever operated unit but that gave trouble in that the lever would jam in the down position. Rather than mess about any more, I bought this button operated unit. It was easy to install and works perfectly. Well pleased with this unit
L**I
Easy install and quality item
Bought to replace my existing one. I didn’t need to replace the whole thing. An eighth of a turn and the old main flush part came out, made sure the base was clean, new part in with an eighth of a turn, all done. Bought another as a spare
M**S
Excellent flush valve replacement so far
Like all the Fluidmaster fittings I've used so far, seems no-nonsense and well designed and made. Relatively easy to fit for a DIY hack like me, not much adjustment to be done, doesn't seem to be temperamental after a month's use. Far better than the Opella Torbeck flush valve it replaced - flushes faster and more reliably. Only time will tell whether the button holds up better than the Opella (I was replacing the Opella's flush button about once every 9 months) but I prefer the button's design and it seems a little less plasticky. If I had a complaint, it would be that the supplied fitting instructions are pretty sparse, but even I managed to figure it out. There are instructional videos on YouTube if you want someone to walk you through it. If you've got a close-coupled toilet and are replacing an existing flush valve, you'll probably want to remember to get a replacement close-coupled toilet fitting kit as well; if it's more than a few years old, the old rubber O-ring seal is likely to not seal any more once you've taken the old valve out - mine was quite badly perished and fell apart in my hands as I took the old valve out. Also make sure you scrape/sandpaper off any sealant or plumber's putty off the cistern that may have been used to 'enhance' the seal between the old valve's washer and the cistern, or the new washer won't seal properly and you'll get a constant slight leak. I missed a bit first time round - rookie error - and had to take everything apart again a day later and do the job all over again.
A**R
Great item
A+++++
N**D
Great service from Plumbing Supermarket. Great price, fast delivery, and a quality product.
N**H
Good quality replacement for my leaking system. Good instructions and easy to install.
L**S
Dopo aver speso una fortuna in bollette acqua, causa perdita dallo sciacquone, e dopo accurata ricerca presso i negozi di idraulica, dove mi proponevano sempre prodotti carissimi e peraltro "niente de che...", ho voluto rischiare acquistando questo prodotto su Amazon. Ebbene! Montato con facilità (è pur vero che sono un discreto bricoleur...), risultato OTTIMO, decisamente superiore alle aspettative. Lo uso ormai da mesi e (incrociando le dita) devo dire che ne sono assolutamente soddisfatto; nonostante l'acqua nella mia città sia molto dura, con notevoli residui calcarei, il sistema di chiusura della valvola è ancora a totale tenuta. Infine, il pulsante parzializzatore dell'acqua funziona perfettamente. Molto soddisfatto
A**O
Es el segundo que compro y no me ha defraudado. Lo instalé en una cisterna Gala, pequeña, de las que tienen boya blanca de toda la vida y de unos 15 años de antigüedad. Con llenado de agua por pared, en vez de por el fondo como los Roca actuales. Las instrucciones son un poco liosas la primera vez que las ves y están en inglés!!!, pero con un poco de paciencia lo consigues instalar. Una vez que instales uno ya sabrás instalar todos. Vienen dos tipos de gomas de cierre según la anchura de tu agujero del fondo de la cisterna, una de goma si el hueco es pequeño y otra de espuma si es grande. En las instrucciones te dice cual usar según la medida que tengas. Para instalarlo debes separar la cisterna del váter quitando dos tornillos de fondo y desenroscar el anterior mecanismo. Luego pones el nuevo con la goma adecuada y enroscas fuerte de nuevo. Pones la cisterna en su sitio de nuevo con una goma de cisterna nueva (que no viene incluida) pero que vale 2 eur como mucho. También puedes reutilizar la vieja, si está en buen estado, con cuidado de colocar bien la cisterna sobre la goma y que ésta quede bien centrada. Aprietas los dos tornillos de fondo muy bien para que no gotee. Luego colocas el pulsador en si sitio, sobre la tapa de cisterna o sobre el lateral, según sea tu váter y ya está. Pros: Compacto y efectivo. Lleva dos pulsadores, uno de descarga corta y otro de descarga larga. Lleva adaptadores para el pulsador, para dejarlo integrado bajo la tapa o sobre la tapa, según sea tu cisterna. El primero que compré lleva 2 años funcionando sin problemas. Suavidad de los pulsadores. Puedes regular la cantidad de agua descargada tanto en el largo como en el corto. Se adapta bien tanto a las cisternas de boya antigua como a las de llenado por fondo. Solo que si la boya pelota blanca te roza un poco con el mecanismo puedes doblarle un poco la varilla para separarla. Si te roza también con la pared de la cisterna la lijas un poco y le quitas un poco de material y ya está. Contras: Las instrucciones vienen en inglés. No viene junta de apoyo de cisterna. No suele ser necesaria pero es aconsejable comprar una y cambiarla. La rosca de abajo del mecanismo es muy larga, y en váteres antiguos o pequeños es posible que casi te toque con el fondo. Yo lo arreglé recortando con un cuchillo 1 centímetro de rosca. 5 minutos y fácil. En otro váter no tuve que hacerlo porque había más espacio. Debes acordarte de regular la columna esa que está en la foto del producto, para darle la altura superior a tu nivel de agua que tienes con la cisterna llena. El nivel lo sabrás mirando la marca de agua de la pared o llenando la cisterna con la tapa quitada. Un buen producto y una instalación nivel principiante-medio Si te lías puedes ver vídeos en internet.
H**A
Perfect fit and as described, fast delivery however worked only for 14 months and then started to leak