Description Toto TSU53A Fill Valve Upgrade for 2 Piece Models. TOTO Replacement Fill Valve by NuFlush Ariel Platinum, TOTO TSU51A, and European Type Toilet Replacement Fill Valve by NuFlush NuFlush Replacement Fill Valve for Toto TSU53A Fill Valve Upgrade for 2 Piece Models with Detachable Filter for Easy Cleaning, Universal Toilet Fill Valve Assembly For TOTO Toilets and Tanks TOTO Replacement Fill Valve by NuFlush Includes fill valve, refill tube and clip, mounting nut, cone washer and coupling nut Fits Toto Model number: TSU51A and many Bottom Water Fed Toilets. Quiet and fast fill valve with durable High Impact ABS Stem