Fluidmaster’s 400A toilet fill valve is the #1 best selling fill valve in the world! This is an anti-siphon design-fill valve with adjustable height from 9″ to 14″. Replace your old style ballcock valve with this better performing Fluidmaster toilet fill valve. Fluidmaster invented the fill valve technology in 1958.

Replaces ballcocks

Easy to install

Height adjusts 9″-14″

Refills quickly

Universal fit for 1 and 2 piece toilets

Corrosion-resistant material

Anti-siphon operation, code approved

Won’t contaminate fresh water supply