Methodology
How the Toilet Fill Valve Finder works
We compare published specifications; we have not tested these products.
Which details affect a match?
A model matches when its details meet every choice you select. Missing or conflicting values stay unknown. If nothing fits, the finder shows the closest option and what it misses.
- Which toilet family needs a replacement?
- What lowest adjustable valve height do you need (in)?
- Maker warranty (years)?
Order and links
The starting order helps you browse. Your choices determine which models match. When the first match has no product link, the finder identifies another linked match separately. Commission amounts do not determine a match.
Sources and limitations
Ten fill valves, five from Korky and five from Fluidmaster, taken from the makers' product pages on September 26, 2026; Fluidmaster's 400A appears twice because the brass-shank version is sold separately. Fit wording is each maker's own. Korky's QuietFILL 528 and Fluidmaster's 703A give no height range. Flush valves, flappers and repair kits aren't covered. We never put these valves in a tank.
The finder shows source links and the dates they were checked. Those dates do not establish today’s price or stock. Before ordering, confirm the model and variant on the seller’s page.
View the product sources