Genuine TOTO Universal Fill Valve by Korky Installation 528GT Introducing the New Genuine TOTO Repair Parts Program from Korky. Authorized by TOTO to keep TOTO toilets running like new. We’ve updated our “Fits TOTO” line with Genuine TOTO by Korky products. The Universal Fill Valve replaces all TOTO fill valves. Simply adjust the height and refill adjustor to restore original performance. The innovative new flapper design replaces all TOTO 3” flappers. The flapper is fully adjustable to restore original performance. Korky Red rubber flappers are resistant to harsh water and proven longest lasting. Both Products come with a 5 year warranty. The New Genuine TOTO by Korky products fit most TOTO Toilets on the market and make selection and installation is easy. The New Genuine TOTO Repair Parts Program from Korky.