Korky 528GT Universal Fill Valve for Toto Toilets, Blue

I used this to replace a similar model and it was very easy to do. The instructions are clear and it took me about 15 minutes to replace on my Toto toilet. Note that this is the 528GT model. I bought it because it has an additional valve to control the water flow and I thought that would be good. In fact, it really does nothing and I just took it off to make things more simple. I suppose you would use this (I suppose because I'm not a plumber or a mechanical engineer) if your water flow into the toilet is too strong and you need to cut down the rate of flow. Otherwise, you'll just leave the valve fully open and it serves no purpose other than to be something that could cause a problem. If your water pressure is not too high, save yourself some money and buy the 528T model. This is not the first Korky product that I have bought and they produce good products. I am very satisfied with this unit as I have been with the other products from them. And, btw the unit I replaced was also a Korky but it failed due to human (this human) error. It would probably have remained in place for the next 10 years if I hadn't tried to adjust it incorrectly.

Quite easy to install. Adjustment of height worked but does require some care. The control for filling the bowl was very convenient and was easy to adjust. It took about 30 minutes to remove the old one and install the new.

It's a toilet repair kit. Yeah. But it was easy to install and solved my problem. The quality appears to be good. Install took less than 5 minutes. Do test the instructing as the kit fits multiple models, but adjustment only takes a second.

The Korky 528 series is a great toilet fill valve kit in general. They are quiet, compact, and easy to install. Unlike the F-brand installed in most American toilets, it looks really clean without all the arms and buoy sticking out of it. The regular (white) 528 would be enough for most toilets, but if you need control of how much the bowl refills, you'll want to upgrade to the premium (silver) 528MP for a few more bucks. The 528MP comes with a bowl fill adjuster/restrictor that will allow you to dial-in the water height for the bowl. If you must keep the "Genuine TOTO" look of the tank with the blue cap, you will want to upgrade to the 528T, 528GT respectively. The 528GT comes with an adjustment tool that helps you adjust the restrictor without trial & error, but the different water pressure in every house never guarantees a perfect fill without trial & error. A warning for homes with "good" water pressure. The 528MP and 528GT may squeal worse than the old valve... DON'T CUT THE FILLER HOSE UNTIL THOROUGHLY TESTED. The 528 series QuietFill valve has a lighter rubber valve than the F-brand or the bigger older TOTO fillers. At high pressure, the valve may close and open abruptly with a high pitch sound. Any kink or back pressure on the bowl filler hose will also make the valve squeal. If opening and closing the restrictor affects the squealing remove the restrictor and see if that solves the problem. If that doesn't help or it messes up the bowl fill rate too much, close the supply valve gradually and lower the water pressure until the valve doesn't squeal any more.

Good product overall. Pretty easy to install. However, there is some leaking under the water tank ... I'd need to re-adjust or do it over again ...