Korky's 528T goes to 8 in and three other Korky valves to 8-1/2 in; four Fluidmaster valves stop at 9 in, and all eight reach 14 in.
Follow the toilet’s fit guidance.
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With no preferences selected: Glacier Bay / Niagara Fill Valve is one option to compare.
Your choices are compared with each model’s product details. A missing or conflicting value stays unknown and cannot satisfy a choice you select. The starting order helps you browse; it does not rate real-world performance.
Source dates appear with each link below. A source date does not confirm today's price or stock.
2X Long Life Toilet Fill Valve: Source 1 ↗ · September 26, 2026
Fits TOTO Toilet Fill Valve: Source 1 ↗ · September 26, 2026
Glacier Bay / Niagara Fill Valve: Source 1 ↗ · September 26, 2026
Leak Sentry Fill Valve: Source 1 ↗ · September 26, 2026
PerforMAX Fill Valve: Source 1 ↗ · September 26, 2026
PRO GRADE Toilet Fill Valve: Source 1 ↗ · September 26, 2026
QuietFILL Platinum Toilet Fill Valve: Source 1 ↗ · September 26, 2026
QuietFILL Toilet Fill Valve: Source 1 ↗ · September 26, 2026
Universal Fill Valve: Source 1 ↗ · September 26, 2026
Universal Fill Valve with Brass Shank: Source 1 ↗ · September 26, 2026
Tank identity is more useful than a universal label
Korky's QuietFILL Platinum adjusts from 8.5 to 14 in and carries a general-fit description. Fluidmaster's Leak Sentry adjusts from 9 to 14 in but carries exclusions even under its Universal label. Compare your tank model with the maker's fit chart before using height to narrow the choice.
Korky's TOTO replacement names G-Max, Power Gravity and E-Max families; Fluidmaster's Glacier Bay / Niagara option is for flapperless toilets only. Fit descriptions identify those intended toilets; installation performance and refill noise have not been measured. A height match cannot make an incompatible tank work.
Height, shank and warranty answer separate questions
Minimum adjustment heights with data span 8 to 9 in; maximum heights with data are 14 in. The ordinary Korky QuietFILL and the flapperless Fluidmaster have no height limits available here. Do not copy another valve's adjustment range onto either model.
Fluidmaster's brass-shank version is a separate configuration with a legacy fit description. Verify the exact variant, exclusions and construction before purchase. Maker warranty terms range from 1 to 10 years; that duration describes coverage, not measured service life.
Before you buy
Which fill valves carry the longest warranty?
Korky's 2X Long Life 528X carries 10 years. The PRO GRADE 528PRO, Fluidmaster's PerforMAX 400H and the brass-shank 400A carry 7 years, and five more carry 5 years. A warranty term is the maker's promise on paper, and it doesn't tell you how long a valve will last.
Will a universal fill valve fit my toilet?
Not every one. Fluidmaster says the 400A and 400LS don't support Glacier Bay or Niagara flapperless toilets or one-piece toilets, and don't replace side-entry valves. Korky calls its four general-fit valves universal, and Fluidmaster aims the brass-shank 400A at toilets made before 1994 that use 3.5 to 7 gallons per flush. Start from your tank model and the valve maker's fit chart; a height match alone won't settle fit. Korky's 528T goes to 8 in and three other Korky valves to 8-1/2 in; four Fluidmaster valves stop at 9 in, and all eight reach 14 in. Korky makes the 528T for TOTO G-Max, Power Gravity and E-Max toilets. Fluidmaster's 703A is made only for those, with a 1-year warranty.
Why do two valves have no height range?
The pages for Korky's QuietFILL 528 and Fluidmaster's 703A give no adjustment range, so any lowest-height choice leaves them out. That choice is an exact match too: picking the Fluidmaster minimum above shows the four Fluidmaster valves with a range, and nothing else.
